Reliability of the original and brief versions of the Eating Disorder Examination in binge-eating disorder.

OBJECTIVE: Psychometric studies evaluating the reliability of eating-disorder assessment among individuals with binge-eating disorder (BED) have been limited. The current study documents the interrater reliability and internal consistency of the Eating Disorder Examination (EDE) interview when administered to adults with Diagnostic and Statistical Manual of Mental Disorders (Fifth Edition) (DSM-5)-defined BED. METHODS: Participants (N = 56) were adults seeking treatment for BED in the context of clinical trials testing pharmacological and psychological treatments. Doctoral-level, trained, and supervised clinical researchers evaluated eating-disorder psychopathology using the EDE interview and audio-recorded the interview. A second doctoral-level, trained, and supervised clinical researcher, who did not conduct the initial assessment, coded eating-disorder psychopathology using the audio recording. RESULTS: Agreement among raters on the number of binge-eating episodes was near perfect. There was excellent interrater reliability for nearly all scales of the EDE interview. Agreement among raters for behavioral indicators of loss of control and marked distress regarding binge eating ranged from moderate to perfect. Internal consistency was variable for all scales, ranging from unacceptable to good. CONCLUSIONS: Our study suggests that the EDE can be administered reliably by multiple interviewers to assess adults with BED. However, internal consistency was mostly subpar. Tests of reliability and other psychometric properties (e.g., validity) in other patient groups such as children with BED are warranted.

Automated Messaging Delivered Alongside Behavioral Treatment for Weight Loss: Qualitative Study.

BACKGROUND: Mobile health interventions for weight loss frequently use automated messaging. However, this intervention modality appears to have limited weight loss efficacy. Furthermore, data on users' subjective experiences while receiving automated messaging-based interventions for weight loss are scarce, especially for more advanced messaging systems providing users with individually tailored, data-informed feedback. OBJECTIVE: The purpose of this study was to characterize the experiences of individuals with overweight or obesity who received automated messages for 6-12 months as part of a behavioral weight loss trial. METHODS: Participants (n=40) provided Likert-scale ratings of messaging acceptability and completed a structured qualitative interview (n=39) focused on their experiences with the messaging system and generating suggestions for improvement. Interview data were analyzed using thematic analysis. RESULTS: Participants found the messages most useful for summarizing goal progress and least useful for suggesting new behavioral strategies. Overall message acceptability was moderate (2.67 out of 5). From the interviews, 2 meta-themes emerged. Participants indicated that although the messages provided useful reminders of intervention goals and skills, they did not adequately capture their lived experiences while losing weight. CONCLUSIONS: Many participants found the automated messages insufficiently tailored to their personal weight loss experiences. Future studies should explore alternative methods for message tailoring (eg, allowing for a higher degree of participant input and interactivity) that may boost treatment engagement and efficacy. TRIAL REGISTRATION: ClinicalTrials.gov NCT05231824; https://clinicaltrials.gov/study/NCT05231824.

Do monthly coaching calls influence proximal participant adherence in a behavioral weight loss program?

Participants who receive continued coach contact following behavioral weight loss treatment are more successful in maintaining their weight loss long-term. The current study examines whether these contacts have dynamic effects, such that participants are most adherent to the prescribed weight loss behaviors in the days after the call, when motivation and goal salience may be heightened, than they are as time goes on. The current study examined the trajectory of calorie intake, physical activity, weight, and self-monitoring behavior in the fourteen days after a monthly coaching call among participants completing the maintenance phase of a behavioral weight loss trial. For physical activity outcomes, caloric intake, and weight, there were no changes across time. Participants did have the highest adherence and quality of dietary self-monitoring immediately after the call, which diminished over time. Coach contact may continually renew commitment to this burdensome but critical behavior. Likelihood of self-weighing showed an opposite trend, where participants were more likely to weigh themselves in the days more distal from the coach call. Results can inform the timing and content of future coach contact to promote weight control.

Associations between average step counts, variability in step counts and nonhomeostatic eating.

PURPOSE: Nonhomeostatic drives (e.g., reward and negative emotion) for eating are associated with weight gain over time. Higher average and lower intraindividual variability in physical activity (PA) levels are positively associated with health and weight outcomes, but have not been evaluated in relation to nonhomeostatic eating. The aim of this paper is to examine the associations between PA and nonhomeostatic drives for eating. The hypotheses were that average levels of and consistency in PA would be negatively correlated with nonhomeostatic eating. METHODS: Adult participants (N = 432) were recruited online and asked to report objectively measured PA using commercially available PA monitors for the previous 7 days and to complete self-report measures of reward-driven and emotional eating. RESULTS: Average daily steps (M = 6519.36) were negatively associated with emotional eating, but were not significantly related to reward-driven eating. Intraindividual variability in steps (M = 2209.85) was not associated with either type of nonhomeostatic eating. Adjusting for relevant covariates (e.g., age, BMI, gender), average daily step count was negatively associated with emotional eating (p = 0.01) but not reward-driven eating (p = 0.31) and variability in step counts was positively associated with reward-driven eating (p = 0.04) but not emotional eating (p = 0.52). CONCLUSION: The results suggest that greater average levels and lower variability in PA are related to lower nonhomeostatic eating; thus, complex associations between PA and eating exist, and may impact weight and outcomes of treatment related to eating and weight. LEVEL OF EVIDENCE: V, cross-sectional correlation study.

Physical activity changes during behavioral weight loss treatment by Latinx patients with obesity with and without binge eating disorder.

OBJECTIVE: This secondary analysis examined physical activity (PA) changes and their prognostic significance among Latinx patients with obesity, with and without binge eating disorder (BED), who participated in a randomized, placebo-controlled trial testing the addition of orlistat to behavioral weight-loss (BWL) treatment in a "real-world" clinical setting. METHODS: In this randomized controlled trial at a community mental health center serving economically disadvantaged Spanish-speaking-only Latinx patients, 79 patients with obesity (40 with BED and 39 without BED) received BWL treatment and were randomized to orlistat or placebo. PA, weight, depression, and binge eating were assessed at baseline, posttreatment (end of treatment [4 months]), and the 6-month follow-up (10 months after baseline). RESULTS: PA was low at baseline (9.3% categorized as "active"), increased during treatment (32.9% categorized as "active" at posttreatment), and declined from posttreatment to the 6-month follow-up (28.2% classified as "active"). At baseline, PA was lower among patients with BED than those without BED. Changes in PA during and after treatment did not differ by BED status or medication condition. PA change was associated with reduced depression but not weight loss. CONCLUSIONS: Latinx patients with obesity receiving BWL treatment achieved significant, albeit modest, increases in PA. Although PA changes were not associated with weight loss, they were associated with reduced depression. Identifying methods to increase PA further is necessary.

Project Step: A Randomized Controlled Trial Investigating the Effects of Frequent Feedback and Contingent Incentives on Physical Activity.

BACKGROUND: Financial incentives and feedback on behavior offer promise for promoting physical activity. However, evidence for the effect of each of these techniques is inadequate. The present study evaluated the effects of daily versus weekly feedback and incentives contingent on reaching a daily walking goal versus noncontingent incentives in a 2 × 2 trial. METHODS: Participants (N = 57) had a body mass index >25 kg/m2 and were insufficiently active. Participants received a daily walking goal that adapted weekly. RESULTS: Participants receiving daily feedback increased daily steps (P = .03) more than those receiving weekly feedback. Participants receiving contingent incentives did not significantly increase steps (P = .12) more than those receiving noncontingent incentives. A trend-level effect (P = .09) suggested that there may be an interaction such that the combination of daily feedback and contingent incentives is most effective. CONCLUSIONS: Results indicate that feedback is an important component of remotely delivered PA interventions and that evaluating each component of low-intensity interventions may help to improve efficacy. Moreover, results indicate that possible synergistic effects of feedback and rewards should be investigated further to help optimize interventions.

Getting a head start: identifying pretreatment correlates associated with early weight loss for individuals participating in weight loss treatment.

Early weight loss is associated with greater weight loss following treatment cessation and years later. The present study aimed to identify pretreatment correlates associated with early weight loss in adults participating in weight-loss treatment in primary care. Participants (N = 89) were in the overweight/obesity range seeking weight-loss treatment in primary-care settings and randomized to one of three treatments: Motivational Interviewing and Internet Condition (MIC), Nutrition Psychoeducation and Internet Condition (NPC), or Usual Care (UC). At baseline, participants were assessed with the Eating Disorder Examination (EDE) interview and completed self-report measures of emotional overeating, exercise, exercise self-efficacy, and depression. Percent weight loss at week six was used as the Early Weight Loss variable. MIC/NPC groups had significantly greater Early Weight Loss than UC. Among MIC/NPC participants only, greater Early Weight Loss was associated with significantly lower pretreatment disordered eating and depressive symptoms. Participants in MIC/NPC who achieved clinically meaningful weight loss (>2.5%) by week six compared with those who did not (<2.5%) reported lower pretreatment disordered eating. Demographic factors and binge-eating disorder diagnosis were unrelated to Early Weight Loss. Our findings suggest that greater early weight loss may be associated with less pretreatment disordered eating and depressive symptoms. CLINICAL TRIALS: NCT01558297.

Factors linking perceived discrimination and weight bias internalization to body appreciation and eating pathology: A moderated mediation analysis of self-compassion and psychological distress.

Stigma and recurrent discriminatory experiences can lead to distress and internalization of biases. Self-compassion is a widely-recognized resilience factor that may decrease the impact of discrimination on psychological well-being. Research highlights the potential utility of self-compassion in counteracting the harmful effects of discrimination, reducing psychological distress, and preventing the development of eating disorders. The current study examined the roles of self-compassion and psychological distress in perceived discrimination, internalized weight bias, body image, and eating pathology. Participants (N=694) living in the United States completed an online battery of measures assessing perceived discrimination, weight bias internalization, self-compassion, psychological distress, body appreciation, and eating pathology. Self-compassion was associated negatively with perceived discrimination, weight-bias internalization, psychological distress, and eating pathology and was associated positively with body appreciation. Moderated mediation analyses examined whether psychological distress statistically mediated the relationship between perceived discrimination (Model 1) or weight bias internalization (Model 2) on body appreciation, as well as between perceived discrimination (Model 3) or weight bias internalization (Model 4) on eating psychopathology. For all models, self-compassion was explored as a moderator of indirect and direct effects. Results revealed how psychological distress mediated the link between perceived discrimination and body appreciation/eating psychopathology, as well as between weight bias internalization and body appreciation, but not eating psychopathology. For weight bias internalization models only, the statistical links between psychological distress in relation to body appreciation/eating psychopathology were stronger for those with lower self-compassion. Self-compassion may promote more effective coping and outcomes for individuals who are subject to societal stigma.

The association between negative affect and physical activity among adults in a behavioral weight loss treatment.

INTRODUCTION: Many individuals engaged in behavioral weight loss make suboptimal increases in moderate-to-vigorous physical activity (MVPA). Theoretically, reductions in negative affect could reinforce MVPA. However, little work has been done investigating the association between facets of negative affect (e.g., average levels of negative affect, variability in negative affect) and MVPA among individuals attempting to increase MVPA as part of a behavioral weight loss attempt. METHODS: Participants (n = 139) provided data at month 6 of a year-long behavioral weight loss program (at which point the prescription for MVPA had reached the highest level). Participants wore an accelerometer and provided EMA ratings of affect over the same week. RESULTS: Individuals engaged in more frequent and longer periods of MVPA had lower average negative affect and variability in negative affect across the assessment period. Lower negative affect one day predicted greater time spent in MVPA on the next day; lower variability in negative affect than one's average level also predicted greater time spent in MVPA on the next day. Greater engagement in MVPA than one's own mean on one day did not predict mean or variability in affect. DISCUSSION: Engaging in MVPA over time may reduce negative affect, while lower negative affect may increase motivation to engage in MVPA. Importantly, day-to-day effects indicated that affect is an important acute predictor of MVPA behavior. It is possible that individuals, particularly those with higher negative affect or variability in negative affect, may benefit from the inclusion of skills to manage negative affect in programs prescribing physical activity.

Perceived barriers to physical activity during and after a behavioural weight loss programme.

BACKGROUND: Most adults with overweight/obesity participating in behavioural weight loss (BWL) programmes never achieve prescribed physical activity (PA) levels. This study examined changes in PA barriers, their relationships with accelerometer-measured PA during and after a 12-month BWL programme, and associations between PA barriers and participant characteristics. METHODS: Adults (N = 283) in a BWL programme completed the Barriers to Being Active Quiz, a 21-item self-report measure that assesses seven perceived PA barriers, and they wore an accelerometer for seven consecutive days at baseline and at 6 (midtreatment), 12 (end of treatment), 18 (6-mo follow-up), and 24 months (12-mo follow-up). Weight and height were measured, and demographic information was collected at baseline. RESULTS: Repeated-measures analyses of variance (ANOVAs) revealed a significant quadratic effect of time on total PA barriers, P < .001, such that PA barriers decreased by midtreatment, remained below baseline levels by end of treatment, but increased to near-baseline levels by follow-up. Perceived PA barriers were negatively associated with baseline moderate-to-vigorous PA (MVPA), P < .001, and decreases in perceived PA barriers were related to greater MVPA at 6 (P = .004), 12 (P < .001), and 24 months (P = .007). Participants who were younger, P = .02, and white, P = .009, reported more baseline barriers. CONCLUSIONS: Perceived PA barriers meaningfully decreased during BWL treatment, which in turn was associated with greater MVPA. This pattern suggests that, on average, BWL effectively addresses perceived PA barriers, which contributes to increased PA. Future research should identify interventions to maintain decreases in barriers after end of treatment.

Is physical activity a risk or protective factor for subsequent dietary lapses among behavioral weight loss participants?

OBJECTIVE: Dietary lapses drive weight loss failure, and specific factors influence risk of lapse. Physical activity (PA) may be one such risk factor, though whether PA increases or decreases appetite, and thus risk of lapse, is unclear. In fact, most studies examining the relation between PA and energy intake are limited by use of laboratory-based settings, intensive PA manipulations, and healthy-weight samples. This study aimed to maximize ecological validity by examining the extent to which free-living PA of various intensities prospectively predicts same-day dietary lapses among individuals enrolled in a weight loss program. METHOD: Participants were 130 adults with overweight/obesity in a behavioral weight loss treatment instructed to follow a PA and dietary prescription. At midtreatment, moderate-to-vigorous PA (MVPA) and light PA were measured using hip-worn Actigraph GT3X+ accelerometers (Actigraph, Pensacola, FL). Lapses were assessed using ecological momentary assessment. Within-subject total PA (b = -0.012, SE = 0.005, p = .01) and light PA (b = -0.014, SE = 0.006, p = .01) negatively predicted lapse. MVPA followed the same pattern, but the effect was not statistically significant (b = -0.013, SE = 0.009, p = .12). CONCLUSION: This study was the first to investigate if objectively measured PA prospectively predicts lapse from a weight loss program. Results suggested that for every additional 10 min of total PA one engaged in, the risk of lapse decreased by 1%. (PsycINFO Database Record (c) 2020 APA, all rights reserved).

Considering Food Addiction through a Cultural Lens.

PURPOSE OF REVIEW: Research suggests that cultural factors influence eating behaviors, however little is known about the relationship between food addiction and culture. This narrative review aimed to i) review theoretically related work on the relationship between sociocultural demographic variables, food cravings, and eating disorders; ii) review the available literature assessing cultural aspects of food addiction, specifically the rates of food addiction across the globe and notable differences in relevant sociodemographic variables: race, ethnicity, gender and acculturation level; iii) discuss the potential impact of culture on our current understanding of food addiction and future research directions emphasizing the inclusion of sociocultural variables. RECENT FINDINGS: Preliminary data suggest that food addiction symptoms occur cross-culturally, and that there may be significant differences between sociodemographic groups. Issues related to adequate lexicalization of concepts central to food addiction (e.g., craving, addiction) and global variations in eating culture and presentation of similar constructs (e.g. binge-eating) contribute to questions raised and identify avenues for further research. SUMMARY: Multidimensional cultural assessment is called for to characterize food addiction among diverse groups and improve our understanding of the etiology, maintenance, and sequelae of food addiction cross-culturally.

Evaluating the Feasibility, Acceptability, and Effects of Deposit Contracts With and Without Daily Feedback to Promote Physical Activity.

BACKGROUND: Despite interest in financial incentive programs, evidence regarding the feasibility, acceptability, and effectiveness of deposit contracts (ie, use of participants' own money as a financial reward) for increasing physical activity (PA) is limited. Furthermore, evidence regarding the use of feedback within incentive programs is limited. PURPOSE: To evaluate: (1) the feasibility and acceptability of deposit contracts for increasing objectively measured PA and (2) the effects of deposit contracts with or without ongoing feedback on PA. METHODS: Participants (n = 24) were exposed to 3 conditions (1) self-monitoring, (2) incentive, and (3) incentive with feedback in an ABACABAC design, with the order of incentive conditions counterbalanced across participants. RESULTS: Effect sizes suggest that individuals had a modest increase in PA during the incentive conditions compared with self-monitoring. Presentation order moderated results, such that individuals exposed to incentives with feedback first performed more poorly across both incentive conditions. In addition, individuals often cited the deposit contract as a reason for not enrolling, and those who did participate reported inadequate acceptability of the incentives and feedback. CONCLUSIONS: Results suggest that while deposit contracts may engender modest increases in PA, this type of incentive may not be feasible or acceptable for promoting PA.

Associations between physical activity and eating-disorder psychopathology among individuals categorised with binge-eating disorder and bulimia nervosa.

OBJECTIVE: While physical activity (PA) is known to have positive effects on psychological and physical health, little is understood about the association between non-compensatory PA (ie, not compulsive or intended to control weight or shape) and psychopathology among individuals with eating-disorder features. The present study explored associations between non-compensatory PA and psychopathology among adults categorised with bulimia nervosa (BN) and binge-eating disorder (BED). We further explored the association between compensatory PA and psychopathology among those who engaged in that form of "purging." METHOD: Participants were recruited through Mechanical Turk, an online recruitment platform. Individuals categorised with core features of BED (N = 138) and BN (N = 138) completed measures of eating-disorder psychopathology (Eating Disorder Examination - Questionnaire [EDE-Q] and Questionnaire on Eating and Weight Patterns - 5), depression (Patient Health Questionnaire - 2) and PA (both non-compensatory and compensatory, measured using the EDE-Q and Godin Leisure-Time Exercise Questionnaire). RESULTS: Engagement in non-compensatory PA was associated with lower frequency of binge-eating episodes, lower overvaluation of shape/weight and lower dissatisfaction with shape/weight (Ps < .05). Engagement in compensatory PA was related to greater frequency of binge-eating episodes and greater restraint (Ps < .05). DISCUSSION: Non-compensatory PA was associated with lower eating-disorder psychopathology. This suggests that PA is an important, though understudied, health behaviour among persons with features of BED and BN. Future research should examine the potential role of non-compensatory PA in interventions for individuals with core features of these eating disorders.

I think therefore I Am? Examining the relationship between exercise identity and exercise behavior during behavioral weight loss treatment.

OBJECTIVES: Identification as an exerciser may promote physical activity. This study examined exercise identity (EI) and its relationship with demographic characteristics and exercise among adults participating in behavioral weight loss treatment, which is a key target population for increasing exercise. DESIGN: Longitudinal. METHOD: Participants (N = 320) completed a measure of EI and exercise was assessed with accelerometers at baseline and 6 months. RESULTS: Baseline EI and exercise were positively related and EI and exercise increased over time. However, change in EI was not meaningfully related to change in exercise, baseline EI did not predict change in exercise, and 6-month EI was not related to 6-month exercise. Participants identifying as non-White reported greater EI but lower exercise. CONCLUSIONS: Although EI and exercise may increase among weight loss participants, the two may not be meaningfully related during active weight loss treatment. The relationship between EI and exercise may also differ based on race.

Can the artificial intelligence technique of reinforcement learning use continuously-monitored digital data to optimize treatment for weight loss?

Behavioral weight loss (WL) trials show that, on average, participants regain lost weight unless provided long-term, intensive-and thus costly-intervention. Optimization solutions have shown mixed success. The artificial intelligence principle of "reinforcement learning" (RL) offers a new and more sophisticated form of optimization in which the intensity of each individual's intervention is continuously adjusted depending on patterns of response. In this pilot, we evaluated the feasibility and acceptability of a RL-based WL intervention, and whether optimization would achieve equivalent benefit at a reduced cost compared to a non-optimized intensive intervention. Participants (n = 52) completed a 1-month, group-based in-person behavioral WL intervention and then (in Phase II) were randomly assigned to receive 3 months of twice-weekly remote interventions that were non-optimized (NO; 10-min phone calls) or optimized (a combination of phone calls, text exchanges, and automated messages selected by an algorithm). The Individually-Optimized (IO) and Group-Optimized (GO) algorithms selected interventions based on past performance of each intervention for each participant, and for each group member that fit into a fixed amount of time (e.g., 1 h), respectively. Results indicated that the system was feasible to deploy and acceptable to participants and coaches. As hypothesized, we were able to achieve equivalent Phase II weight losses (NO = 4.42%, IO = 4.56%, GO = 4.39%) at roughly one-third the cost (1.73 and 1.77 coaching hours/participant for IO and GO, versus 4.38 for NO), indicating strong promise for a RL system approach to weight loss and maintenance.

Time to Peak Weight Loss During Extended Behavioral Treatment.

OBJECTIVE: This study was designed to examine the variability in timing of peak weight loss in behavioral treatment (BT), that is, when treatment participants reach their greatest amount of cumulative weight loss. METHODS: Secondary data analyses were conducted, drawing upon data from two clinical trials that provided 12 months of group-based BT, with sessions meeting less frequently in the second half of the treatment year. Weight was measured at the beginning of each treatment session. RESULTS: Cumulative proportions of participants reaching peak weight loss were as follows: 25.0% of study 1 and 20.0% of study 2 participants by month 4; 43.2% of study 1 and 52.2% of study 2 participants by month 6; 54.5% of study 1 and 77.8% of study 2 participants by month 8. Among participants who peaked after 4 months, the mean amount of additional weight loss achieved between 4 months and the peak session was 4.74 kg in study 1 and 4.07 kg in study 2. CONCLUSIONS: Substantial variability in the timing of peak weight loss was observed, with larger than expected proportions of participants reaching their greatest amount of cumulative weight loss in the final months of treatment. This variability may create methodological and clinical challenges.

Associations between change in sedentary behavior and outcome in standard behavioral weight loss treatment.

Sedentary behavior, particularly in prolonged periods, is an important determinant of health. Little research exploring changes in sedentary behavior during behavioral weight loss programs exists. This study evaluated the magnitude of changes in total and prolonged sedentary behavior and how these changes related to changes in weight and cardiovascular outcomes during a behavioral weight loss program. Participants (n = 450) in two lifestyle modification programs underwent assessments of sedentary behavior (by accelerometry), weight, waist circumference, blood pressure, and resting heart rate at baseline and after 6 months of treatment. Sedentary behavior was defined as both total and prolonged (≥30 continuous minutes) sedentary minutes/day. Reductions in total and prolonged sedentary time were significant and were accounted for by increases in moderate-to-vigorous physical activity (MVPA). Only changes in MVPA significantly predicted change in weight when entered into a model simultaneously with changes in sedentary behavior. Changes in total and prolonged sedentary time were not associated with changes in waist circumference, heart rate, or blood pressure. Change in sedentary time was not independently associated with change in health outcomes during a behavioral weight loss treatment. High variability in changes in sedentary time indicate that individual differences may be important to examine. Reducing sedentary time may not be powerful enough to impact these health outcomes above the effects of other changes made during these programs; alternatively, it may be that increasing focus in treatment on reducing sedentary time may engender greater decreases in sedentariness, which could lead to better health outcomes.

Pilot Test of an Acceptance-Based Behavioral Intervention to Promote Physical Activity During Weight Loss Maintenance.

Behavioral interventions for obesity reliably facilitate short-term weight loss, but weight regain is normative. A high level of aerobic exercise may promote weight loss maintenance. However, adopting and maintaining a high level of exercise is challenging, and experiential acceptance may be important. The aim of this study was to pilot test the feasibility and efficacy of an acceptance-based behavioral treatment to promote moderate-to-vigorous physical activity (MVPA) among individuals who had recently lost weight. Adults (n = 16) who had recently lost ≥ 5% of weight were provided with a 12-week, group-based treatment. At 12 weeks, complete analyses indicated that participants had increased activity 69% (completing an average of 198.27 minutes/week of bouted MVPA, i.e., episodes of at least 10 minutes in duration). Medium-to-large effect sizes were observed for changes in process measures, including experiential acceptance. Future research to test this approach using an experimental design, a larger sample, and a longer period of observation is warranted.

The association between previous success with weight loss through dietary change and success in a lifestyle modification program.

Prior work has yielded mixed results regarding the association between previous weight loss and success in a current weight loss attempt. The present study evaluated differences in baseline psychosocial processes, changes in these over time, and weight loss during a yearlong behavioral weight loss program between individuals who have and have not previously been successful losing weight through self-regulating dietary intake. Individuals with prior success had greater weight losses over time than those without. Differences in baseline and change over time in some facets of motivation and self-efficacy were observed, but only differences in attendance accounted for differential weight loss. Prior success with dietary self-regulation may predict better adherence to and success in behavioral weight control programs. Evaluating the type of weight control efforts that have previously helped induce weight losses may help to better match individuals to treatments likely to yield success.