Drive, reward sensitivity and the flattening of both.
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126 to 150 of 1,483Examining depletion theories under conditions of within-task transfer.
In everyday life, mental fatigue can be detrimental across many domains including driving, learning, and working. Given the importance of understanding and accounting for the deleterious effects of mental fatigue on behavior, a growing body of literature has studied the role of motivational and executive control processes in mental fatigue. In typical laboratory paradigms, participants complete a task that places demand on these self-control processes and are later given a subsequent task. Generally speaking, decrements to subsequent task performance are taken as evidence that the initial task created mental fatigue through the continued engagement of motivational and executive functions. Several models have been developed to account for negative transfer resulting from this "ego depletion." In the current study, we provide a brief literature review, specify current theoretical approache…
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Edbrooke L, Aranda S, Granger CL, McDonald CF, Krishnasamy M, Mileshkin L, Irving L, Braat S, Clark RA, Gordon I, Denehy L (2017)randomised controlled trialMEDLINE-indexed journal, not yet read by usBMC cancer19 citations Benefits of home-based multidisciplinary exercise and supportive care in inoperable non-small cell lung cancer - protocol for a phase II randomised controlled trial.
Background: Lung cancer is one of the most commonly diagnosed cancers, and is a leading cause of cancer mortality world-wide. Due to lack of early specific symptoms, the majority of patients present with advanced, inoperable disease and five-year relative survival across all stages of non-small cell lung cancer (NSCLC) is 14%. People with lung cancer also report higher levels of symptom distress than those with other forms of cancer. Several benefits for survival and patient reported outcomes are reported from physical activity and exercise in other tumour groups. We report the protocol for a study investigating the benefits of exercise, behaviour change and symptom self-management for patients with recently diagnosed, inoperable, NSCLC.
Methods: This multi-site, parallel-group, assessor-blinded randomised controlled trial, powered for superiority, aims to assess functional and patient-r…
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Stroke Prevention Rehabilitation Intervention Trial of Exercise (SPRITE) - a randomised feasibility study.
Background: The value of cardiac rehabilitation (CR) after a transient ischaemic attack (TIA) or minor stroke is untested despite these conditions sharing similar pathology and risk factors to coronary heart disease. We aimed to evaluate the feasibility of conducting a trial of an adapted home-based CR programme, 'The Healthy Brain Rehabilitation Manual', for patients following a TIA/minor stroke, participants' views on the intervention and, to identify the behaviour change techniques (BCTs) used.
Methods: Clinicians were asked to identify patients attending the Ulster Hospital, Belfast within 4 weeks of a first TIA or minor stroke. Those who agreed to participate underwent assessments of physical fitness, cardiovascular risk, quality of life and mental health, before random allocation to: Group (1) standard/usual care; (2) rehabilitation manual or (3) manual plus pedometer. All particip…
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Internet-Based Delivery of Cognitive Behaviour Therapy Compared to Monitoring, Feedback and Support for Problem Gambling: A Randomised Controlled Trial.
The aim of this study was to investigate the efficacy of an Internet-based cognitive behavioural therapy program (I-CBT) for the treatment of problem gambling, when compared to a waitlist control and an active comparison condition consisting of monitoring, feedback, and support (I-MFS). Participants (N = 174) were randomly allocated to the three conditions. Variables of interest were gambling outcome and related mental health measures. Participants in the active conditions (I-CBT and I-MFS) completed six online modules. Both I-CBT and I-MFS conditions resulted in significant treatment gains on gambling severity. However, I-CBT was also associated with reductions in a range of other gambling-related and mental health outcomes. Compared with I-MFS, I-CBT produced greater effects across seven outcomes measures, relating to gambling urges, cognitions, stress, and life satisfaction. I-CBT par…
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ParticiPAte CP: a protocol of a randomised waitlist controlled trial of a motivational and behaviour change therapy intervention to increase physical activity through meaningful participation in children with cerebral palsy.
Introduction: Children with cerebral palsy (CP) participate in leisure-time physical activities (PA) less often, with less intensity and reduced diversity than their typically developing peers. Participation in leisure-time physical activities may be an important source of habitual physical activity (HPA) for children with CP, who as a group have lower levels of HPA and increased sedentary time compared with their typically developing peers. The proposed study aims to compare the efficacy of a participation focused therapy (ParticiPAte CP) to usual care in a pragmatic, randomised waitlist controlled trial.
Methods and analysis: Thirty-six children with CP (18 in each group), classified as Gross Motor Function Classification System levels I to III, aged between 8 and 12 years will be recruited across South East Queensland, Australia. Children will be randomised to receive either ParticiPA…
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Countering the Consequences of Ego Depletion: The Effects of Self-Talk on Selective Attention.
This study examined the effects of a self-talk intervention on selective attention in a state of ego depletion. Participants were 62 undergraduate students with a mean age of 20.02 years (SD = 1.17). The experiment was conducted in four consecutive sessions. Following baseline assessment, participants were randomly assigned into experimental and control groups. A two-session training was conducted for the two groups, with the experimental group using self-talk. In the final assessment, participants performed a selective attention test, including visual and auditory components, following a task inducing a state of ego depletion. The analysis showed that participants of the experimental group achieved a higher percentage of correct responses on the visual test and produced faster reaction times in both the visual and the auditory test compared with participants of the control group. The re…
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Mediators of Psychological Well-being in Adolescent Boys.
Purpose: The aim of this study was to explore the effect of the Active Teen Leaders Avoiding Screen-time (ATLAS) intervention on psychological well-being in adolescent boys and to examine the potential mediating mechanisms that might explain this effect.
Methods: ATLAS was evaluated using a cluster randomized controlled trial in 14 secondary schools located in low-income communities (N = 361 adolescent boys, mean age = 12.7 ± .5 years). The 20-week intervention was guided by self-determination theory and involved: professional development for teachers, provision of fitness equipment to schools, enhanced school sport sessions, researcher-led seminars, a smartphone application, and parental strategies for reducing screen time. Assessments were conducted at baseline and immediately post intervention (8 months). Psychological well-being was measured using the Flourishing Scale. Motivational …
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Too Depleted to Try? Testing the Process Model of Ego Depletion in the Context of Unhealthy Snack Consumption.
Background: The process model proposes that the ego depletion effect is due to (a) an increase in motivation toward indulgence, and (b) a decrease in motivation to control behaviour following an initial act of self-control. In contrast, the reflective-impulsive model predicts that ego depletion results in behaviour that is more consistent with desires, and less consistent with motivations, rather than influencing the strength of desires and motivations. The current study sought to test these alternative accounts of the relationships between ego depletion, motivation, desire, and self-control.
Methods: One hundred and fifty-six undergraduate women were randomised to complete a depleting e-crossing task or a non-depleting task, followed by a lab-based measure of snack intake, and self-report measures of motivation and desire strength.
Results and conclusions: In partial support of the proc…
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Drinking to Cope: a Latent Class Analysis of Coping Motives for Alcohol Use in a Large Cohort of Adolescents.
Alcohol consumption during adolescence is widespread, although there is considerable variation in patterns of use. The aim of this study was to identify patterns of coping-motivated alcohol use in a UK birth cohort and examine individual and family characteristics associated with the resulting drinker profiles. At age 17, participants (n = 3957; 56 % female) reported their alcohol and drug use, internalising symptoms and use of alcohol to cope with a range of emotions. Socio-demographic data were collected via maternal report. Latent class analysis identified drinker subtypes based on the coping motives reported. Association between these profiles and socio-demographic characteristics and internalising disorders was examined. The vast majority (92 %) of adolescents reported alcohol consumption in the past year, and 26 % of those drank weekly or more often. Four distinct motive profiles w…
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Storr SM, Sparks P (2016)randomised controlled trialMEDLINE-indexed journal, not yet read by usPsychology & health8 citations Does self-affirmation following ego depletion moderate restrained eaters' explicit preferences for, and implicit associations with, high-calorie foods?
Objective: The difficulty for chronic dieters (i.e. restrained eaters) in regulating their food intake is a conflict between two apparently incompatible goals: eating enjoyment and weight control. The latter goal consistently relies on the deployment of cognitive resources, and very often on a significant amount of self-control. This study investigated whether self-affirmation might counteract the effect of ego depletion on restrained eaters' motivation to consume high-calorie foods.
Design: Participants (N = 183) were assigned to one of four conditions in a 2 × 2 (Ego depletion × Self-Affirmation) experimental design and were subsequently exposed to images of high- and low-calorie foods.
Main outcome measures: Participants completed tasks assessing their implicit and explicit preferences for high vs. low-calorie foods, along with a measure of the perceived self-control required to resis…
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A salutogenic program to enhance sense of coherence and quality of life for older people in the community: A feasibility randomized controlled trial and process evaluation.
Objective: To determine the feasibility of a salutogenesis-based self-care program on quality of life, sense of coherence, activation and resilience among older community dwellers.
Methods: This is a feasibility randomized controlled trial. Sixty-four older community-dwellers were recruited from a Singapore senior activity center and randomly assigned to intervention and control groups. The intervention group attended a 12-week Resource Enhancement and Activation Program. The outcomes were assessed with the Chinese versions of World Health Organization Quality of Life Scale, Sense of Coherence, Patient Activation Measure, and Connor-Davidson Resilience Scale. Process evaluation was conducted using focus groups with the intervention group.
Results: At the end of the program, the intervention group showed significant improvement in the Sense of Coherence scale and the psychological subscal…
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Diet and exercise in uterine cancer survivors (DEUS pilot) - piloting a healthy eating and physical activity program: study protocol for a randomized controlled trial.
Background: Endometrial cancer survivors comprise a high-risk group for obesity-related comorbidities. Healthy eating and physical activity can lead to better health and well-being, but this population may experience difficulties adopting healthy lifestyle practices. Personalised behaviour change programmes that are feasible, acceptable and cost-effective are needed. The aim of this trial is to pilot a manualised programme about healthy eating and physical activity.
Methods/design: This is a phase II, individually randomized, parallel, controlled, two-site, pilot clinical trial. Adult endometrial cancer survivors (n = 64) who have been diagnosed with endometrial cancer within the previous 3 years and are not on active treatment will be invited to participate. Participants will be assigned in a 1:1 ratio through minimisation to either an 8-week, group-based, behaviour-change programme wit…
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Enhancing Working Memory Training with Transcranial Direct Current Stimulation.
Working memory (WM) is a fundamental cognitive ability that supports complex thought but is limited in capacity. Thus, WM training interventions have become very popular as a means of potentially improving WM-related skills. Another promising intervention that has gained increasing traction in recent years is transcranial direct current stimulation (tDCS), a noninvasive form of brain stimulation that can modulate cortical excitability and temporarily increase brain plasticity. As such, it has the potential to boost learning and enhance performance on cognitive tasks. This study assessed the efficacy of tDCS to supplement WM training. Sixty-two participants were randomized to receive either right prefrontal, left prefrontal, or sham stimulation with concurrent visuospatial WM training over the course of seven training sessions. Results showed that tDCS enhanced training performance, which…
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Too proud to regulate: The differential effect of pride versus joy on children's ability to delay gratification.
We examined the effect of the distinct positive emotions pride and joy on children's self-regulation, focusing on their ability to delay gratification (i.e., resist a temptation in favor of a long-term goal). We hypothesized that because pride corresponds to the attainment of long-term goals and joy corresponds to the attainment of immediate desires, the experience of pride may signal sufficient progress toward a long-term goal, resulting in less delay of gratification than the experience of joy. To test this hypothesis, we induced an experience of pride or joy in 8-year-old children. At this age, the ability to self-regulate--and to experience pride and joy distinctively--is relatively mature. We then measured performance in a delay discounting task. We found that, compared with the joy condition and a control condition, children who experienced pride performed worse on the delay discou…
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Study protocol for a randomized clinical trial of a fatherhood intervention for African American non-resident fathers: Can we improve father and child outcomes?
Purpose: African American (AA) fathers who live apart from their children face multiple obstacles to consistent and positive involvement with their children. Consequently, significant numbers of children are bereft of their father's positive involvement. Intervention research that is explicitly focused on promoting the positive involvement of non-resident AA fathers with their young children is limited. The purpose of this article is to describe the study protocol of a randomized trial (RCT) designed to test the Building Bridges to Fatherhood program against a financial literacy comparison condition; and discuss early implementation challenges.
Methods: Fathers (n=180) are recruited to attend 10 group meetings, reimbursed for transportation, given dinner and activity vouchers for spending time with their child, and incentivized with a $40 gift card at each data collection time point. Mot…
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Bond DS, Vithiananthan S, Thomas JG, Trautvetter J, Unick JL, Jakicic JM, Pohl D, Ryder BA, Roye GD, Sax HC, Wing RR (2015)randomised controlled trialMEDLINE-indexed journal, not yet read by usSurgery for obesity and related diseases : official journal of the American Society for Bariatric Surgery62 citations Bari-Active: a randomized controlled trial of a preoperative intervention to increase physical activity in bariatric surgery patients.
Background: Habitual physical activity (PA) may help to optimize bariatric surgery outcomes; however, objective PA measures show that most patients have low PA preoperatively and make only modest PA changes postoperatively. Patients require additional support to adopt habitual PA. The objective of this study was to test the efficacy of a preoperative PA intervention (PAI) versus standard presurgical care (SC) for increasing daily moderate-to-vigorous PA (MVPA) in bariatric surgery patients.
Methods: Outcomes analysis included 75 participants (86.7% women; 46.0±8.9 years; body mass index [BMI]=45.0±6.5 kg/m2) who were randomly assigned preoperatively to 6 weeks of PAI (n=40) or SC (n=35). PAI received weekly individual face-to-face sessions with tailored instruction in behavioral strategies (e.g., self-monitoring, goal-setting) to increase home-based walking exercise. The primary outcome,…
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Chadwick AE (2015)randomised controlled trialMEDLINE-indexed journal, not yet read by usHealth communication47 citations Toward a theory of persuasive hope: effects of cognitive appraisals, hope appeals, and hope in the context of climate change.
Hope has the potential to be a powerful motivator for influencing behavior. However, hope and messages that evoke hope (hope appeals) have rarely been the focus of theoretical development or empirical research. As a step toward the effective development and use of hope appeals in persuasive communication, this study conceptualized and operationalized hope appeals in the context of climate change prevention. Then, the study manipulated components of the hope evocation part of a hope appeal. Specifically, the components were designed to address appraisals of the importance, goal congruence, future expectation, and possibility of climate protection, resulting in a 2 (strong/weak importance) × 2 (strong/weak goal congruence) × 2 (strong/weak future expectation) × 2 (strong/weak possibility) between-subjects pretest-posttest factorial design. Two hundred forty-five undergraduate students were…
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Parent and child perceptions of school-based obesity prevention in England: a qualitative study.
Background: Schools are key settings for childhood obesity prevention, and the location for many intervention studies. This qualitative study aims to explore parent and child experiences of the WAVES study obesity prevention intervention, in order to gain understanding of the mechanisms by which the intervention results in behaviour change, and provide context to support interpretation of the main trial results.
Methods: Focus groups were held with 30 parents and 62 children (aged 6-7 years) from primary schools in the West Midlands, UK. Data analysis (conducted using NVivo 10) was guided by the Framework Approach.
Results: Three over-arching themes were identified: 'Impact', 'Sustainability' and 'Responsibilities', under which sub-themes were determined. Participants were supportive of the school-based intervention. Parental involvement and the influential role of the teacher were seen …
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Carnes M, Devine PG, Baier Manwell L, Byars-Winston A, Fine E, Ford CE, Forscher P, Isaac C, Kaatz A, Magua W, Palta M, Sheridan J (2015)randomised controlled trialMEDLINE-indexed journal, not yet read by usAcademic medicine : journal of the Association of American Medical Colleges256 citations The effect of an intervention to break the gender bias habit for faculty at one institution: a cluster randomized, controlled trial.
Purpose: Despite sincere commitment to egalitarian, meritocratic principles, subtle gender bias persists, constraining women's opportunities for academic advancement. The authors implemented a pair-matched, single-blind, cluster randomized, controlled study of a gender-bias-habit-changing intervention at a large public university.
Method: Participants were faculty in 92 departments or divisions at the University of Wisconsin-Madison. Between September 2010 and March 2012, experimental departments were offered a gender-bias-habit-changing intervention as a 2.5-hour workshop. Surveys measured gender bias awareness; motivation, self-efficacy, and outcome expectations to reduce bias; and gender equity action. A timed word categorization task measured implicit gender/leadership bias. Faculty completed a work-life survey before and after all experimental departments received the intervention. …
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Reaching the hard to reach: longitudinal investigation of adolescents' attendance at an after-school sexual and reproductive health programme in Western Cape, South Africa.
Background: Adolescents need access to effective sexual and reproductive health (SRH) interventions, but face barriers accessing them through traditional health systems. School-based approaches might provide accessible, complementary strategies. We investigated whether a 21-session after-school SRH education programme and school health service attracted adolescents most at risk for adverse SRH outcomes and explored motivators for and barriers to attendance.
Methods: Grade 8 adolescents (average age 13 years) from 20 schools in the intervention arm of an HIV prevention cluster randomised controlled trial in the Western Cape Province of South Africa, were invited to participate in an after-school SRH program and to attend school health services. Using a longitudinal design, we surveyed participants at baseline, measured their attendance at weekly after-school sessions for 6 months and surv…
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Wilson DK, Kitzman-Ulrich H, Resnicow K, Van Horn ML, St George SM, Siceloff ER, Alia KA, McDaniel T, Heatley V, Huffman L, Coulon S, Prinz R (2015)randomised controlled trialMEDLINE-indexed journal, not yet read by usContemporary clinical trials46 citations An overview of the Families Improving Together (FIT) for weight loss randomized controlled trial in African American families.
Background: The Families Improving Together (FIT) randomized controlled trial tests the efficacy of integrating cultural tailoring, positive parenting, and motivational strategies into a comprehensive curriculum for weight loss in African American adolescents. The overall goal of the FIT trial is to test the effects of an integrated intervention curriculum and the added effects of a tailored web-based intervention on reducing z-BMI in overweight African American adolescents.
Design and setting: The FIT trial is a randomized group cohort design the will involve 520 African American families with an overweight adolescent between the ages of 11-16 years. The trial tests the efficacy of an 8-week face-to-face group randomized program comparing M + FWL (Motivational Plus Family Weight Loss) to a comprehensive health education program (CHE) and re-randomizes participants to either an 8-week on…
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Feature-level analysis of a novel smartphone application for smoking cessation.
Background: Currently, there are over 400 smoking cessation smartphone apps available, downloaded an estimated 780,000 times per month. No prior studies have examined how individuals engage with specific features of cessation apps and whether use of these features is associated with quitting.
Objectives: Using data from a pilot trial of a novel smoking cessation app, we examined: (i) the 10 most-used app features, and (ii) prospective associations between feature usage and quitting.
Methods: Participants (n = 76) were from the experimental arm of a randomized, controlled pilot trial of an app for smoking cessation called "SmartQuit," which includes elements of both Acceptance and Commitment Therapy (ACT) and traditional cognitive behavioral therapy (CBT). Utilization data were automatically tracked during the 8-week treatment phase. Thirty-day point prevalence smoking abstinence was asse…
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Increasing self-regulatory energy using an Internet-based training application delivered by smartphone technology.
Self-control resources can be defined in terms of "energy." Repeated attempts to override desires and impulses can result in a state of reduced self-control energy termed "ego depletion" leading to a reduced capacity to regulate future self-control behaviors effectively. Regular practice or "training" on self-control tasks may improve an individual's capacity to overcome ego depletion effectively. The current research tested the effectiveness of training using a novel Internet-based smartphone application to improve self-control and reduce ego depletion. In two experiments, participants were randomly assigned to either an experimental group, which received a daily program of self-control training using a modified Stroop-task Internet-based application delivered via smartphone to participants over a 4-week period, or a no-training control group. Participants assigned to the experimental g…
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Psychosocial mediators of change in physical activity in the Welsh national exercise referral scheme: secondary analysis of a randomised controlled trial.
Objective: While an increasing number of randomised controlled trials report impacts of exercise referral schemes (ERS) on physical activity, few have investigated the mechanisms through which increases in physical activity are produced. This study examines whether a National Exercise Referral Scheme (NERS) in Wales is associated with improvements in autonomous motivation, self-efficacy and social support, and whether change in physical activity is mediated by change in these psychosocial processes.
Methods: A pragmatic randomised controlled trial of NERS across 12 LHBs in Wales. Questionnaires measured demographic data and physical activity at baseline. Participants (N = 2160) with depression, anxiety or CHD risk factors were referred by health professionals and randomly assigned to control or intervention. At six months psychological process measures were collected by questionnaire. At…
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Role of pill-taking, expectation and therapeutic alliance in the placebo response in clinical trials for major depression.
Background: Pill-taking, expectations and therapeutic alliance may account for much of the benefit of medication and placebo treatment for major depressive disorder (MDD). Aims To examine the effects of medication, placebo and supportive care on treatment outcome, and the relationships of expectations and therapeutic alliance to improvement.
Method: A total of 88 participants were randomised to 8 weeks of treatment with supportive care alone or combined with double-blind treatment with placebo or antidepressant medication. Expectations of medication effectiveness, general treatment effectiveness and therapeutic alliance were measured (trial registration at ClinicalTrials.gov: NCT00200902).
Results: Medication or placebo plus supportive care were not significantly different but had significantly better outcome than supportive care alone. Therapeutic alliance predicted response to medicati…
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