Drive, reward sensitivity and the flattening of both.
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Ḥadīth
الحديث6 shownSound narrations only, and never matched by text. A narration appears here because a compiler filed it under a chapter this subject maps to, or because someone read it and anchored it. Each row says which.
حَدَّثَنَا هَدَّابُ بْنُ خَالِدٍ، حَدَّثَنَا حَمَّادُ بْنُ سَلَمَةَ، ح وَحَدَّثَنِي زُهَيْرُ بْنُ حَرْبٍ، حَدَّثَنَا مُعَاذُ بْنُ مُعَاذٍ الْعَنْبَرِيُّ، ح وَحَدَّثَنِي مُحَمَّدُ بْنُ عَبْدِ الأَعْلَى، حَدَّثَنَا الْمُعْتَمِرُ، ح وَحَدَّثَنَا إِسْحَاقُ، بْنُ إِبْرَاهِيمَ أَخْبَرَنَا جَرِيرٌ، كُلُّهُمْ عَنْ سُلَيْمَانَ التَّيْمِيِّ، ح وَحَدَّثَنَا أَبُو كَامِلٍ، فُضَيْلُ بْنُ حُسَيْنٍ - وَاللَّفْظُ لَهُ - حَدَّثَنَا يَزِيدُ بْنُ زُرَيْعٍ، حَدَّثَنَا التَّيْمِيُّ، عَنْ أَبِي عُثْمَانَ، عَنْ أُسَامَةَ بْنِ زَيْدٍ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " قُمْتُ عَلَى بَابِ الْجَنَّةِ فَإِذَا عَامَّةُ مَنْ دَخَلَهَا الْمَسَاكِينُ وَإِذَا أَصْحَابُ الْجَدِّ مَحْبُوسُونَ إِلاَّ أَصْحَابَ النَّارِ فَقَدْ أُمِرَ بِهِمْ إِلَى النَّارِ وَقُمْتُ عَلَى بَابِ النَّارِ فَإِذَا عَامَّةُ مَنْ دَخَلَهَا النِّسَاءُ " .
Usama b. Zaid reported that Allah's Messenger (way peace be upon him) said:I stood at the door of Paradise and I found that the overwhelming majority of those who entered therein was that of poor persons and the wealthy persons were detained to get into that. The denizens of Hell were commanded to get into Hell, and I stood upon the door of Fire and the majority amongst them who entered there was that of women
حَدَّثَنَا أَبُو كُرَيْبٍ، حَدَّثَنَا أَبُو أُسَامَةَ، عَنْ سَعِيدِ بْنِ أَبِي عَرُوبَةَ، سَمِعَ أَبَا رَجَاءٍ، عَنِ ابْنِ عَبَّاسٍ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم فَذَكَرَ مِثْلَهُ .
This hadith is narrated likewise through another chain of transmitters
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مَسْلَمَةَ بْنِ قَعْنَبٍ، حَدَّثَنَا سُلَيْمَانُ، - يَعْنِي ابْنَ بِلاَلٍ - عَنْ جَعْفَرٍ، عَنْ أَبِيهِ، عَنْ جَابِرِ بْنِ عَبْدِ اللَّهِ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم مَرَّ بِالسُّوقِ دَاخِلاً مِنْ بَعْضِ الْعَالِيَةِ وَالنَّاسُ كَنَفَتَهُ فَمَرَّ بِجَدْىٍ أَسَكَّ مَيِّتٍ فَتَنَاوَلَهُ فَأَخَذَ بِأُذُنِهِ ثُمَّ قَالَ " أَيُّكُمْ يُحِبُّ أَنَّ هَذَا لَهُ بِدِرْهَمٍ " . فَقَالُوا مَا نُحِبُّ أَنَّهُ لَنَا بِشَىْءٍ وَمَا نَصْنَعُ بِهِ قَالَ " أَتُحِبُّونَ أَنَّهُ لَكُمْ " . قَالُوا وَاللَّهِ لَوْ كَانَ حَيًّا كَانَ عَيْبًا فِيهِ لأَنَّهُ أَسَكُّ فَكَيْفَ وَهُوَ مَيِّتٌ فَقَالَ " فَوَاللَّهِ لَلدُّنْيَا أَهْوَنُ عَلَى اللَّهِ مِنْ هَذَا عَلَيْكُمْ " .
Jabir b. Abdullah reported that Allah's Apostle (ﷺ) happened to walk through the bazar coming from the side of 'Aliya and the people were on both his sides. There he found a dead lamb with very short ears. He took hold of his ear and said:Who amongst you would like to have this for a dirham? They said: We do not like to have it even for less than that as it is of no use to us. He said: Do you wish to have it (free of any cost)? They said: By Allah, even if it were alive (we would not have liked to possess that), for there is defect in it as its ear is very short; now it is dead also. Thereupon Allah's Messenger (ﷺ) said: By Allah, this world is more insignificant in the eye of Allah than it (this dead lamb) is in your eye
حَدَّثَنِي مُحَمَّدُ بْنُ الْمُثَنَّى الْعَنَزِيُّ، وَإِبْرَاهِيمُ بْنُ مُحَمَّدِ بْنِ عَرْعَرَةَ السَّامِيُّ، قَالاَ حَدَّثَنَا عَبْدُ الْوَهَّابِ، - يَعْنِيَانِ الثَّقَفِيَّ - عَنْ جَعْفَرٍ، عَنْ أَبِيهِ، عَنْ جَابِرٍ، عَنِ النَّبِيِّ صلى الله عليه وسلم . بِمِثْلِهِ غَيْرَ أَنَّ فِي حَدِيثِ الثَّقَفِيِّ فَلَوْ كَانَ حَيًّا كَانَ هَذَا السَّكَكُ بِهِ عَيْبًا .
Jabir reported Allah's Apostle (ﷺ) narrating a hadith like this with a slight variation of wording
حَدَّثَنَا الْمَكِّيُّ بْنُ إِبْرَاهِيمَ، أَخْبَرَنَا عَبْدُ اللَّهِ بْنُ سَعِيدٍ ـ هُوَ ابْنُ أَبِي هِنْدٍ ـ عَنْ أَبِيهِ، عَنِ ابْنِ عَبَّاسٍ ـ رضى الله عنهما ـ قَالَ قَالَ النَّبِيُّ صلى الله عليه وسلم " نِعْمَتَانِ مَغْبُونٌ فِيهِمَا كَثِيرٌ مِنَ النَّاسِ، الصِّحَّةُ وَالْفَرَاغُ ". قَالَ عَبَّاسٌ الْعَنْبَرِيُّ حَدَّثَنَا صَفْوَانُ بْنُ عِيسَى، عَنْ عَبْدِ اللَّهِ بْنِ سَعِيدِ بْنِ أَبِي هِنْدٍ، عَنْ أَبِيهِ، سَمِعْتُ ابْنَ عَبَّاسٍ، عَنِ النَّبِيِّ صلى الله عليه وسلم مِثْلَهُ.
Narrated Ibn `Abbas:The Prophet (ﷺ) said: "There are two blessings that many people are deceived into losing: health and free time
حَدَّثَنِي أَحْمَدُ بْنُ الْمِقْدَامِ، حَدَّثَنَا الْفُضَيْلُ بْنُ سُلَيْمَانَ، حَدَّثَنَا أَبُو حَازِمٍ، حَدَّثَنَا سَهْلُ بْنُ سَعْدٍ السَّاعِدِيُّ، كُنَّا مَعَ رَسُولِ اللَّهِ صلى الله عليه وسلم فِي الْخَنْدَقِ وَهْوَ يَحْفِرُ وَنَحْنُ نَنْقُلُ التُّرَابَ وَيَمُرُّ بِنَا فَقَالَ " اللَّهُمَّ لاَ عَيْشَ إِلاَّ عَيْشُ الآخِرَهْ، فَاغْفِرْ لِلأَنْصَارِ وَالْمُهَاجِرَهْ ". تَابَعَهُ سَهْلُ بْنُ سَعْدٍ عَنِ النَّبِيِّ صلى الله عليه وسلم مِثْلَهُ.
Narrated Sahl bin Sa`d As-Sa`idi:We were in the company of Allah's Messenger (ﷺ) in (the battle of) Al-Khandaq, and he was digging the trench while we were carrying the earth away. He looked at us and said, "O Allah! There is no life worth living except the life of the Hereafter, so (please) forgive the Ansar and the Emigrants
Classical works
كتب التراث6 shownArabic originals, reached through the subject’s Arabic senses. Interpretive sources, never proof of a ruling.
mukhtasar-minhaj §321mukhtasar-minhajArabic sense: الفتور, الكسل, فتور, كسل
ومن آدابه: أن لا يمتلئ من الطعام فى الليل، بل يأكل بمقدار، فانه ما ملأ ابن آدم وعاء شرا من بطن. ومتى شبع أول الليل لم ينتفع بنفسه فى باقيه، وكذلك إذا شبع وقت السحر لم ينتفع بنفسه إلى قريب من الظهر، لأن كثرة الأكل تورث الكسل والفتور، ثم يفوت المقصود من الصيام بكثرة الأكل، لأن المراد منه أن يذوق طعم الجوع، ويكون تاركا للمشتهى.
madarij §3757madarijArabic sense: الفتور, الكسل, فتور, كسل
بين القبض والبسط أي ينقطع إلى صحبة الحال وهو الوارد الذي يرد على القلب من تأثيره بالمعاملة السالب لوصف الكسل والفتور الجالب له إلى مرافقة الرفيق الأعلى الذين أنعم الله عليهم فينتقل من مقام العلم إلى مقام الكشف ومن مقام رسوم الأعمال إلى مقام حقائقها وأذواقها ومواجيدها وأحوالها فيترقى من الإسلام إلى الإيمان ومن الإيمان إلى الإحسان
wabil-sayyib §43wabil-sayyibArabic sense: الفتور, الكسل, فتور, كسل
فحقيقة التعظيم للامر والنهي ان لا يعارضا بترخص جاف ولا يعرضا لتشديد غال فان المقصود هو الصراط المستقيم الموصل إلى الله عز وجل بسالكه وما امر الله عز وجل بأمر الا وللشيطان فيه نزغتان اما تقصير وتفريط واما افراط وغلو فلا يبالي بما ظفر من العبد من الخطيئتين فانه ياتي إلى قلب العبد فيستامه فان وجد فيه فتورا وتوانيا وترخيصا اخذه من هذه الخطة فثبطه واقعده وضربه بالكسل والتواني والفتور وفتح له باب التاويلات والرجاء وغير ذلك حتى ربما ترك العبد المامور جملة
fawaid §490fawaidArabic sense: الفتور, الكسل, فتور, كسل
العزيمة فيصدقه في عزمه وفي فعله قال تعالى فإذا عزم الأمر فلو صدقوا الله لكان خيرا لهم فسعادته في صدق العزيمة وصدق الفعل فصدق العزيمة جمعها وجزمها وعدم التردد فيها بل تكون عزيمة لا يشوبها تردد ولا تلوم فإذا صدقت عزيمته بقى عليه صدق الفعل وهو استفراغ الوسع وبذل الجهد فيه وأن لا يتخلف عنه بشيء من ظاهره وباطنه فعزيمة القصد تمنعه من ضعف الإرادة والهمة وصدق الفعل يمنعه من الكسل والفتور ومن صدق الله في جميع أموره صنع الله له فوق ما يصنع لغيره وهذا الصدق معنى يلتئم من صحة الإخلاص وصدق التوكل فأصدق الناس من صح إخلاصه وتوكله
madarij §6757madarijArabic sense: الفتور, الكسل, فتور, كسل
فالإيمان بالصفات ومعرفتها وإثبات حقائقها وتعلق القلب بها وشهوده لها هو مبدأ الطريق ووسطه وغايته وهو روح السالكين وحاديهم إلى الوصول ومحرك عزماتهم إذا فتروا ومثير هممهم إذا قصروا فإن سيرهم إنما هو على الشواهد فمن كان لا شاهد له فلا سير له ولا طلب ولا سلوك له وأعظم الشواهد صفات محبوبهم ونهاية مطلوبهم وذلك هو العلم الذي رفع لهم في السير فشمروا إليه كما قالت عائشة رضي الله عنها من رأى رسول الله فقد رآه غاديا رائحا لم يضع لبنة على لبنة ولكن رفع له علم فشمر إليه ولا يزال العبد في التواني والفتور والكسل حتى يرفع الله عز وجل له بفضله ومنه علما يشاهده بقلبه فيشمر إليه ويعمل عليه
madarij §1930madarijArabic sense: الفتور, الكسل, فتور, كسل
قال الله تعالى : ففروا إلى الله الذاريات : 50 ] وحقيقة الفرار : الهرب من شيء إلى شيء وهو نوعان : فرار السعداء وفرار الأشقياء ففرار السعداء : الفرار إلى الله عز وجل وفرار الأشقياء : الفرار منه لا إليه وأما الفرار منه إليه : ففرار أوليائه قال ابن عباس في قوله تعالى : ففروا إلى الله الذاريات : 50 ] : فروا منه إليه واعملوا بطاعته وقال سهل بن عبدالله : فروا مما سوى الله إلى الله وقال آخرون : اهربوا من عذاب الله إلى ثوابه بالإيمان والطاعة وقال صاحب المنازل : هو الهرب مما لم يكن إلى من لم يزل وهو على ثلاث درجات : فرار العامة من الجهل إلى العلم عقدا وسعيا ومن الكسل إلى التشمير جدا وعزما ومن الضيق إلى السعة ثقة ورجاء يريد بما لم يكن الخلق وبما لم يزل الحق وقوله : فرار العامة : من الجهل إلى العلم عقدا وسعيا الجهل نوعان : عدم العلم بالحق النافع وعدم العمل بموجبه ومقتضاه فكلاهما جهل لغة وعرفا وشرعا وحقيقة قال موسى : أعوذ بالله أن أكون من الجاهلين البقره : 67 ] لما قال له قومه : أتتخذنا هزوا البقره :
Research library
المكتبة البحثية1,483 works heldPeer-reviewed work held with its DOI and abstract, labelled with the study design its publication types report. None of it has been read or assessed, so nothing here may be cited as showing anything. Retracted work is held for the record but never listed; a review that a later version replaced is listed under its replacement and marked.
10.1016/j.pnpbp.2021.110289Progress in neuro-psychopharmacology & biological psychiatry (2021)MEDLINE-indexed journal, not yet read by us; matched on Anhedonia, Motivation, Reward, Ventral Tegmental Area, anhedonia Anhedonia as a central factor in depression: Neural mechanisms revealed from preclinical to clinical evidence.: Anhedonia is one of the core symptoms of major depressive disorder (MDD), which is often inadequately treated by traditional antidepressants. The modern framework of anhedonia extends the definition from impaired consummatory pleasure or interest in rewards to a broad spectrum of deficits that impact functions such as reward anticipation, approach motivation, effort expenditure, reward valuation, expectation, and reward-cue association learning. Substantial preclinical and clinical research has
10.1016/j.jad.2024.09.007Journal of affective disorders (2024)MEDLINE-indexed journal, not yet read by us; matched on Anhedonia, Reward, anhedonia, reward sensitivity How to improve reward sensitivity - Predictors of long-term effects of a randomized controlled online intervention trial.: Background: Reward sensitivity is a central maintaining factor of depression. Current treatments fail at sufficiently and reliably modifying reward processing. Therefore, we employed interventions targeting reward sensitivity and evaluated the long-term efficacy of different online interventions, additionally exploring predictors of changes in reward sensitivity.
Methods: This four-arm randomized controlled trial (RCT) tested the long-term stability of treatment effects during a four-month follo
10.1016/j.brat.2023.104455Behaviour research and therapy (2024)MEDLINE-indexed journal, not yet read by us; matched on Reward, Anhedonia, anhedonia, reward sensitivity Effectiveness of behavioral activation and mindfulness in increasing reward sensitivity and reducing depressive symptoms - A randomized controlled trial.: Reward insensitivity is a potential key mechanism regarding the maintenance of depression. However, there is a lack of research examining and comparing the effectiveness of different psychological interventions in modifying reward insensitivity. This four-arm randomized controlled trial (RCT) investigated a two-week online intervention. After screening for eligibility, a total of 336 participants were randomized, and 224 participated per-protocol. Participants were assigned to either a) behavior
'We pledge to improve the health of our entire community': Improving health worker motivation and performance in Bihar, India through teamwork, recognition, and non-financial incentives.: Background: Motivation is critical to health worker performance and work quality. In Bihar, India, frontline health workers provide essential health services for the state's poorest citizens. Yet, there is a shortfall of motivated and skilled providers and a lack of coordination between two cadres of frontline health workers and their supervisors. CARE India developed an approach aimed at improving health workers' performance by shifting work culture and strengthening teamwork and motivation. Th
A systematic review and meta-analysis of the effort-reward imbalance model of workplace stress with indicators of immune function.: Objective: Despite considerable research into associations between the effort reward imbalance (ERI) model and various health outcomes over the past 20years, the underlying mechanisms responsible for the association remain unclear. Recently, ERI investigations have examined associations with immune sub-systems (e.g., leukocytes, cytokines and immunoglobulins). Synthesis of the amalgamated research evidence will aid clarity to this field of enquiry. We conducted a meta-analysis and reviewed the a
The utility of monetary contingency contracts for weight loss: a systematic review and meta-analysis.: Financial incentives to improve health have received increasing attention, but are subject to ethical concerns. Monetary Contingency Contracts (MCCs), which require individuals to deposit money that is refunded contingent on reaching a goal, are a potential alternative strategy. This review evaluates systematically the evidence for weight loss-related MCCs. Randomised controlled trials testing the effect of weight loss-related MCCs were identified in online databases. Random-effects meta-analyse
Research library, full list
1276 to 1300 of 1,483Han W, Tellez LA, Perkins MH, Perez IO, Qu T, Ferreira J, Ferreira TL, Quinn D, Liu ZW, Gao XB, Kaelberer MM, Bohórquez DV, Shammah-Lagnado SJ, de Lartigue G, de Araujo IE (2018)MEDLINE-indexed journal, not yet read by usCell542 citations A Neural Circuit for Gut-Induced Reward.
The gut is now recognized as a major regulator of motivational and emotional states. However, the relevant gut-brain neuronal circuitry remains unknown. We show that optical activation of gut-innervating vagal sensory neurons recapitulates the hallmark effects of stimulating brain reward neurons. Specifically, right, but not left, vagal sensory ganglion activation sustained self-stimulation behavior, conditioned both flavor and place preferences, and induced dopamine release from Substantia nigra. Cell-specific transneuronal tracing revealed asymmetric ascending pathways of vagal origin throughout the CNS. In particular, transneuronal labeling identified the glutamatergic neurons of the dorsolateral parabrachial region as the obligatory relay linking the right vagal sensory ganglion to dopamine cells in Substantia nigra. Consistently, optical activation of parabrachio-nigral projections …
matched on Reward (mesh)
Microglial dopamine receptor elimination defines sex-specific nucleus accumbens development and social behavior in adolescent rats.
Adolescence is a developmental period in which the mesolimbic dopaminergic "reward" circuitry of the brain, including the nucleus accumbens (NAc), undergoes significant plasticity. Dopamine D1 receptors (D1rs) in the NAc are critical for social behavior, but how these receptors are regulated during adolescence is not well understood. In this report, we demonstrate that microglia and complement-mediated phagocytic activity shapes NAc development by eliminating D1rs in male, but not female rats, during adolescence. Moreover, immune-mediated elimination of D1rs is required for natural developmental changes in male social play behavior. These data demonstrate for the first time that microglia and complement-mediated immune signaling (i) participate in adolescent brain development in a sex-specific manner, and (ii) are causally implicated in developmental changes in behavior. These data have …
matched on Reward (mesh)
Generalized trust predicts young children's willingness to delay gratification.
Young children's willingness to delay gratification by forgoing an immediate reward to obtain a more desirable one in the future predicts a wide range of positive social, cognitive, and health outcomes. Standard accounts of this phenomenon have focused on individual differences in cognitive control skills that allow children to engage in goal-oriented behavior, but recent findings suggest that person-specific trust is also important, with children showing a stronger tendency to delay gratification if they have reason to trust the individual who is promising the future reward. The current research builds on those findings by examining generalized trust, which refers to the extent to which others are generally viewed as trustworthy. A total of 150 3- to 5-year-olds in China were tested. Participants were given the opportunity to obtain one sticker immediately, or wait for 15 min for two st…
matched on Reward (mesh)
Dissociable roles of glucocorticoid and noradrenergic activation on social discounting.
People often exhibit prosocial tendencies towards close kin and friends, but generosity decreases as a function of increasing social distance between donor and recipient, a phenomenon called social discounting. Evidence suggests that acute stress affects prosocial behaviour in general and social discounting in particular. We tested the causal role of the important stress neuromodulators cortisol (CORT) and noradrenaline (NA) in this effect by considering two competing hypotheses. On the one hand, it is possible that CORT and NA act in concert to increase generosity towards socially close others by reducing the aversiveness of the cost component in costly altruism and enhancing the emotional salience of vicarious reward. Alternatively, it is equally plausible that CORT and NA exert dissociable, opposing effects on prosocial behaviour based on prior findings implicating CORT in social affi…
matched on Reward (mesh)
Biased and less sensitive: A gamified approach to delay discounting in heroin addiction.
Introduction: People with addiction will continue to use drugs despite adverse long-term consequences. We hypothesized (a) that this deficit persists during substitution treatment, and (b) that this deficit might be related not only to a desire for immediate gratification, but also to a lower sensitivity for optimal decision making. We investigated how individuals with a history of heroin addiction perform (compared to healthy controls) in a virtual reality delay discounting task. This novel task adds to established measures of delay discounting an assessment of the optimality of decisions, especially in how far decisions are influenced by a general choice bias and/or a reduced sensitivity to the relative value of the two alternative rewards. We used this measure of optimality to apply diffusion model analysis to the behavioral data to analyze the interaction between decision optimality …
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Habits Are Negatively Regulated by Histone Deacetylase 3 in the Dorsal Striatum.
Background: Optimal behavior and decision making result from a balance of control between two strategies, one cognitive/goal-directed and one habitual. These systems are known to rely on the anatomically distinct dorsomedial and dorsolateral striatum, respectively. However, the transcriptional regulatory mechanisms required to learn and transition between these strategies are unknown. Here we examined the role of one chromatin-based transcriptional regulator, histone modification via histone deacetylases (HDACs), in this process.
Methods: We combined procedures that diagnose behavioral strategy in rats with pharmacological and viral-mediated HDAC manipulations, chromatin immunoprecipitation, and messenger RNA quantification.
Results: The results indicate that dorsal striatal HDAC3 activity constrains habit formation. Systemic HDAC inhibition following instrumental (lever press → reward) …
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Coordinated Acetylcholine Release in Prefrontal Cortex and Hippocampus Is Associated with Arousal and Reward on Distinct Timescales.
Cholinergic neurotransmission throughout the neocortex and hippocampus regulates arousal, learning, and attention. However, owing to the poorly characterized timing and location of acetylcholine release, its detailed behavioral functions remain unclear. Using electrochemical biosensors chronically implanted in mice, we made continuous measurements of the spatiotemporal dynamics of acetylcholine release across multiple behavioral states. We found that tonic levels of acetylcholine release were coordinated between the prefrontal cortex and hippocampus and maximal during training on a rewarded working memory task. Tonic release also increased during REM sleep but was contingent on subsequent wakefulness. In contrast, coordinated phasic acetylcholine release occurred only during the memory task and was strongly localized to reward delivery areas without being contingent on trial outcome. The…
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Aarts E, Ederveen THA, Naaijen J, Zwiers MP, Boekhorst J, Timmerman HM, Smeekens SP, Netea MG, Buitelaar JK, Franke B, van Hijum SAFT, Arias Vasquez A (2017)MEDLINE-indexed journal, not yet read by usPloS one245 citations Gut microbiome in ADHD and its relation to neural reward anticipation.
Background: Microorganisms in the human intestine (i.e. the gut microbiome) have an increasingly recognized impact on human health, including brain functioning. Attention-deficit/hyperactivity disorder (ADHD) is a neurodevelopmental disorder associated with abnormalities in dopamine neurotransmission and deficits in reward processing and its underlying neuro-circuitry including the ventral striatum. The microbiome might contribute to ADHD etiology via the gut-brain axis. In this pilot study, we investigated potential differences in the microbiome between ADHD cases and undiagnosed controls, as well as its relation to neural reward processing.
Methods: We used 16S rRNA marker gene sequencing (16S) to identify bacterial taxa and their predicted gene functions in 19 ADHD and 77 control participants. Using functional magnetic resonance imaging (fMRI), we interrogated the effect of observed m…
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Reward type and behavioural patterns predict dogs' success in a delay of gratification paradigm.
Inhibiting an immediate behaviour in favour of an alternative but more advantageous behaviour has been linked to individual success in life, especially in humans. Dogs, which have been living in the human environment for thousands of years, are exposed to daily situations that require inhibition different in context from other non-domesticated species. One task regularly used to study inhibitory control is the delay of gratification task, which requires individuals to choose between an immediate option of lower value and a delayed option of higher value. We tested sixteen dogs in a non-social delay of gratification task, conducting two different conditions: a quality and a quantity condition. While the majority of dogs failed to wait for more than 10 s, some dogs tolerated delays of up to 140 s, while one dog waited for 15 minutes. Moreover, dogs had more difficulties to wait if the rewa…
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Dynamic Nigrostriatal Dopamine Biases Action Selection.
Dopamine is thought to play a critical role in reinforcement learning and goal-directed behavior, but its function in action selection remains largely unknown. Here we demonstrate that nigrostriatal dopamine biases ongoing action selection. When mice were trained to dynamically switch the action selected at different time points, changes in firing rate of nigrostriatal dopamine neurons, as well as dopamine signaling in the dorsal striatum, were found to be associated with action selection. This dopamine profile is specific to behavioral choice, scalable with interval duration, and doesn't reflect reward prediction error, timing, or value as single factors alone. Genetic deletion of NMDA receptors on dopamine or striatal neurons or optogenetic manipulation of dopamine concentration alters dopamine signaling and biases action selection. These results unveil a crucial role of nigrostriatal …
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Search predicts and changes patience in intertemporal choice.
Intertemporal choice impacts many important outcomes, such as decisions about health, education, wealth, and the environment. However, the psychological processes underlying decisions involving outcomes at different points in time remain unclear, limiting opportunities to intervene and improve people's patience. This research examines information-search strategies used during intertemporal choice and their impact on decisions. In experiment 1, we demonstrate that search strategies vary substantially across individuals. We subsequently identify two distinct search strategies across individuals. Comparative searchers, who compare features across options, discount future options less and are more susceptible to acceleration versus delay framing than integrative searchers, who integrate the features of an option. Experiment 2 manipulates search using an unobtrusive method to establish a caus…
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Global and local excitation and inhibition shape the dynamics of the cortico-striatal-thalamo-cortical pathway.
The cortico-striatal-thalamo-cortical (CSTC) pathway is a brain circuit that controls movement execution, habit formation and reward. Hyperactivity in the CSTC pathway is involved in obsessive compulsive disorder (OCD), a neuropsychiatric disorder characterized by the execution of repetitive involuntary movements. The striatum shapes the activity of the CSTC pathway through the coordinated activation of two classes of medium spiny neurons (MSNs) expressing D1 or D2 dopamine receptors. The exact mechanisms by which balanced excitation/inhibition (E/I) of these cells controls the network dynamics of the CSTC pathway remain unclear. Here we use non-linear modeling of neuronal activity and bifurcation theory to investigate how global and local changes in E/I of MSNs regulate the activity of the CSTC pathway. Our findings indicate that a global and proportionate increase in E/I pushes the sys…
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Attention to nurses' rewarding - an interview study of registered nurses working in primary and private healthcare in Finland.
Aims and objectives: To identify meaningful types of rewards and the consequences of rewards as expressed by Finnish registered nurses working in primary and private healthcare.
Background: Previous studies have found significant associations between nurses' rewards and both their commitment and job satisfaction. Furthermore, appropriate rewards can have beneficial effects on factors including workforce stability and occupational satisfaction that are highly important in times of nurse shortages.
Design: A cross-sectional, qualitative interview study.
Methods: Data were collected via individual semi-structured interviews (n = 20) with registered nurses working in Finland's primary and private healthcare, and subjected to qualitative content analysis.
Results: Six meaningful types of rewards were identified by the registered nurses: Financial compensation and benefits, Work-Life balance, …
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Midbrain Dopamine Neurons Signal Belief in Choice Accuracy during a Perceptual Decision.
Central to the organization of behavior is the ability to predict the values of outcomes to guide choices. The accuracy of such predictions is honed by a teaching signal that indicates how incorrect a prediction was ("reward prediction error," RPE). In several reinforcement learning contexts, such as Pavlovian conditioning and decisions guided by reward history, this RPE signal is provided by midbrain dopamine neurons. In many situations, however, the stimuli predictive of outcomes are perceptually ambiguous. Perceptual uncertainty is known to influence choices, but it has been unclear whether or how dopamine neurons factor it into their teaching signal. To cope with uncertainty, we extended a reinforcement learning model with a belief state about the perceptually ambiguous stimulus; this model generates an estimate of the probability of choice correctness, termed decision confidence. We…
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Delay Discounting of Reward and Impulsivity in Eating Disorders: From Anorexia Nervosa to Binge Eating Disorder.
Evidence points to eating disorder patients displaying altered rates of delay discounting (one's degree of preference for immediate rewards over larger delayed rewards). Anorexia nervosa (AN) patients are believed to have an increased capacity to delay reward, which reflects their ability to override the drive to eat. Contrarily, binge eating disorder (BED) patients are associated with a reduced predisposition to delay gratification. Here, we investigated monetary delay discounting and impulsivity in 80 adult women with EDs (56 AN and 24 BED), diagnosed according to Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition criteria, and 80 healthy controls. AN-restrictive (AN-R) subtype patients showed less steep discounting rates than BED and AN-bingeing/purging subtype patients. Compared with healthy controls and AN-R patients, BED and AN-bingeing/purging patients presented …
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Within-subject neural reactivity to reward and threat is inverted in young adolescents.
Background: As children mature, they become increasingly independent and less reliant on caregiver support. Changes in brain systems are likely to stimulate and guide this process. One mechanistic hypothesis suggests that changes in neural systems that process reward and threat support the increase in exploratory behavior observed in the transition to adolescence. This study examines the basic tenets of this hypothesis by performing functional magnetic resonance imaging (fMRI) during well-established reward and threat processing tasks in 40 children and adolescents, aged 9-15 years.
Method: fMRI responses in the striatum and amygdala are fit to a model predicting that striatal reward and amygdala threat-responses will be unrelated in younger participants (aged 9-12 years), while older participants (aged 13-15 years) will differentially engage these structures.
Results: Our data are consi…
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Abnormal neural responses to feedback in depressed adolescents.
Depression rates surge in adolescence, particularly among females. Recent findings suggest that depressed adolescents are characterized by hypersensitivity to negative outcomes and blunted responsiveness to rewards. However, our understanding of the pathophysiology and time course of these abnormalities remains limited. Due to their high temporal resolution, event-related potentials (ERPs) provide an ideal probe to investigate these processes. In the present study, healthy (n = 25) and depressed (n = 26) female adolescents (13-18 years) completed a gambling task during 128-channel ERP recording. Time-domain analyses focused on ERPs linked to initial processing of negative versus rewarding outcomes (feedback-related negativity; FRN), and later, elaborative processing (late positive potential; LPP). Additionally, time-frequency analyses were used to decompose the FRN into its 2 constituent…
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Temporal Discounting and the Tendency to Delay Gratification across the Eating Disorder Spectrum.
Bulimia nervosa (BN) and binge eating disorder (BED) have been associated with poorer reward-related inhibitory control, reflected by a reduced tendency to delay gratification. The opposite has been reported in anorexia nervosa (AN), but differences have not been directly compared across eating disorders (EDs). This study investigated self-reported (Delaying Gratification Inventory) and task-based (temporal discounting) inhibitory control in 66 women with an ED and 28 healthy controls (HCs). Poorer task-based inhibitory control was observed in the BN compared with the AN group and poorer self-reported inhibitory control in the BN and in the BED groups compared with the AN and the HC groups, suggesting that reward-related inhibitory control varies across EDs. Symptom severity correlated with poorer self-reported (but not task-based) inhibitory control across the EDs. These data provide so…
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Rutledge RB, Moutoussis M, Smittenaar P, Zeidman P, Taylor T, Hrynkiewicz L, Lam J, Skandali N, Siegel JZ, Ousdal OT, Prabhu G, Dayan P, Fonagy P, Dolan RJ (2017)MEDLINE-indexed journal, not yet read by usJAMA psychiatry118 citations Association of Neural and Emotional Impacts of Reward Prediction Errors With Major Depression.
Importance: Major depressive disorder (MDD) is associated with deficits in representing reward prediction errors (RPEs), which are the difference between experienced and predicted reward. Reward prediction errors underlie learning of values in reinforcement learning models, are represented by phasic dopamine release, and are known to affect momentary mood.
Objective: To combine functional neuroimaging, computational modeling, and smartphone-based large-scale data collection to test, in the absence of learning-related concerns, the hypothesis that depression attenuates the impact of RPEs.
Design, setting, and participants: Functional magnetic resonance imaging (fMRI) data were collected on 32 individuals with moderate MDD and 20 control participants who performed a probabilistic reward task. A risky decision task with repeated happiness ratings as a measure of momentary mood was also test…
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Associations of Occupational Stressors, Perceived Organizational Support, and Psychological Capital with Work Engagement among Chinese Female Nurses.
This study aimed to explore the associations of occupational stressors (extrinsic effort, reward, and overcommitment), perceived organizational support (POS), and psychological capital (PsyCap) and its components (self-efficacy, hope, resilience, and optimism) with work engagement and the mediating roles of PsyCap and its components among Chinese female nurses within the framework of the job demands-resources (JD-R) model. A cross-sectional sample (1,330) completed the Utrecht Work Engagement Scale, Effort-Reward Imbalance Scale, Survey of POS, and PsyCap Questionnaire, and effective respondents were 1,016 (76.4%). Hierarchical regression analysis and Preacher and Hayes' asymptotic and resampling strategies were used. Extrinsic effort was negatively associated with vigor, dedication, and absorption, while POS, PsyCap, and hope were positively associated with them. Reward and overcommitme…
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Dopamine selectively remediates 'model-based' reward learning: a computational approach.
Patients with loss of dopamine due to Parkinson's disease are impaired at learning from reward. However, it remains unknown precisely which aspect of learning is impaired. In particular, learning from reward, or reinforcement learning, can be driven by two distinct computational processes. One involves habitual stamping-in of stimulus-response associations, hypothesized to arise computationally from 'model-free' learning. The other, 'model-based' learning, involves learning a model of the world that is believed to support goal-directed behaviour. Much work has pointed to a role for dopamine in model-free learning. But recent work suggests model-based learning may also involve dopamine modulation, raising the possibility that model-based learning may contribute to the learning impairment in Parkinson's disease. To directly test this, we used a two-step reward-learning task which dissociat…
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Increased temporal discounting in bulimia nervosa.
Objective: There is evidence that people with eating disorders display altered intertemporal choice behavior (the degree of preference for immediate rewards over delayed rewards). Compared to healthy controls (HC), individuals with anorexia nervosa and binge-eating disorder show decreased and increased rates of temporal discounting (TD; the devaluation of delayed rewards), respectively. This is the first study to investigate TD in people with bulimia nervosa (BN).
Method: Thirty-nine individuals with BN (2 men) and 53 HC (9 men) completed a hypothetical monetary TD task. Over 80 binary choices, participants chose whether they would prefer to receive a smaller amount of money available immediately or a larger amount available in 3 months. Self-reported ability to delay gratification (the behavioral opposite of TD) was also measured.
Results: Individuals with BN showed greater TD (i.e., a …
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Midbrain dopamine neurons signal aversion in a reward-context-dependent manner.
Dopamine is thought to regulate learning from appetitive and aversive events. Here we examined how optogenetically-identified dopamine neurons in the lateral ventral tegmental area of mice respond to aversive events in different conditions. In low reward contexts, most dopamine neurons were exclusively inhibited by aversive events, and expectation reduced dopamine neurons' responses to reward and punishment. When a single odor predicted both reward and punishment, dopamine neurons' responses to that odor reflected the integrated value of both outcomes. Thus, in low reward contexts, dopamine neurons signal value prediction errors (VPEs) integrating information about both reward and aversion in a common currency. In contrast, in high reward contexts, dopamine neurons acquired a short-latency excitation to aversive events that masked their VPE signaling. Our results demonstrate the importan…
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Power TG, Olivera YA, Hill RA, Beck AD, Hopwood V, Garcia KS, Ramos GG, Fisher JO, O'Connor TM, Hughes SO (2016)MEDLINE-indexed journal, not yet read by usAppetite27 citations Emotion regulation strategies and childhood obesity in high risk preschoolers.
The current study examined the relationships between the specific strategies that preschool children use to regulate their emotions and childhood weight status to see if emotion regulation strategies would predict childhood weight status over and above measures of eating self-regulation. 185 4- to 5-year-old Latino children were recruited through Head Start centers in a large city in the southeastern U.S. Children completed both a delay of gratification task (emotion regulation) and an eating in the absence of hunger task (eating regulation). Eating regulation also was assessed by maternal reports. Four emotion regulation strategies were examined in the delay of gratification task: shut out stimuli, prevent movement, distraction, and attention to reward. Hierarchical linear regressions predicting children's weight status showed that both measures of eating regulation negatively predicted…
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Self-control assessments of capuchin monkeys with the rotating tray task and the accumulation task.
Recent studies of delay of gratification in capuchin monkeys using a rotating tray (RT) task have shown improved self-control performance in these animals in comparison to the accumulation (AC) task. In this study, we investigated whether this improvement resulted from the difference in methods between the rotating tray task and previous tests, or whether it was the result of greater overall experience with delay of gratification tasks. Experiment 1 produced similar performance levels by capuchins monkeys in the RT and AC tasks when identical reward and temporal parameters were used. Experiment 2 demonstrated a similar result using reward amounts that were more similar to previous AC experiments with these monkeys. In Experiment 3, monkeys performed multiple versions of the AC task with varied reward and temporal parameters. Their self-control behavior was found to be dependent on the ov…
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