The use of commitment techniques to support weight loss maintenance in obese adolescents

Objectives: Obesity is a rising problem in adolescents related to unhealthy behaviours. Commitment devises are one type of behavioural intervention that may help people change their behaviours. The current pilot trial tests whether commitment devices delivered via text message help adolescents maintain their recent weight loss.

Methods: During a 12-week pilot trial, adolescents who attended a weight loss camp were randomly assigned to either received text messages that contained only information, i.e. advice, about weight loss management (n = 13) or asked for them to commit to following the same advise (n = 14).

Results: The BMI of the adolescents in the commitment group did not change. In contrast, the BMI of adolescents in the information group increased. A linear regression revealed that group was a significant predictor of BMI change. A logistic regression revealed that adolescents in the information group were nearly eight times more likely to regain weight than those in the commitment group.

Conclusions: This is the first study with adolescents to show weight maintenance using a commitment device. The results suggest that commitment devices can help adolescents maintain their recent weight loss.     

‘Something That Unites Us All’: Understandings of St. Patrick's Day Parades as Representing the Irish National Group

The present study investigates how attendees at national celebratory crowd events—specifically St. Patrick's Day parades—understand the role of such events in representing and uniting the national community. We conducted semi‐structured interviews with people who attended St. Patrick's Day parades in either Dublin or Belfast. In year 1, full‐length interviews were conducted before and after the events (N = 17), and in years 1 and 2, shorter interviews were conducted during the events (year 1 N = 170; year 2 N = 142). Interview data were analysed using thematic analysis, allowing the identification of three broad themes. Participants reported that (i) the events extend the boundary of the national group, using participation to define who counts as Irish; (ii) the events strategically represent the nature of the national group, maximising positive images and managing stereotypical representations; and (iii) symbolism serves to unify the group but can also disrupt already fragile unity and so must be managed. Overall, this points to a strategic identity dimension to these crowd events. We discuss the implications of these findings for future research in terms of the role of large‐scale celebratory events in the strategic representation of everyday social identities. © 2015 The Authors. Journal of Community & Applied Social Psychology published by John Wiley & Sons Ltd.     

Imagination,Illusion and Experience in Film

Philosophical Studies -     

An easily built and inexpensive apparatus for generating electroconvulsive shock

An easily constructed and inexpensive apparatus for generating electroconvulsive shock is described. The wide range of shock level adjustment and reliability of operation make it an excellent piece of equipment to have in laboratories using electroconvulsive shock as an experimental tool for research on memory and memory storage processes.     

Consolidation and interference in the perceptual memory system

Previous verbal/memory studies have indicated that perceptual processes continue to occur after the stimulus is terminated. The present study investigated whether a blank period after a nonverbal stimulus would function to strengthen or consolidate the sensory trace in memory. A “delayed-comparison task” of recognition memory for pitch was employed in two experiments. The results indicated that a blank interval after the tone to be remembered increased the memory strength of that tone when the tone’s duration was brief (.2 sec). However, an empty interval after a tone with a longer duration (.5 sec) did not affect memory performance. Memory strength also decreased over time during a retroactive interval tone. A storage-interference model described the quantitative results accurately.     

The effects of feedback in psychophysical tasks

Previous results of the reinforcement effects of feedback in psychophysical tasks have been interpreted as changes in the S’s response bias in the uncertain sensory state. The present study varied the percentage of feedback in a two-altemative loud-soft recognition task. The values of the probability of correct feedback were 1, .8, .6, .4, .2, and 0. The results indicated that Ss learned to respond to agree with the experimental feedback rather than with the actual cue presented on a trial. The probability of a response on Trial n +1 was highly dependent upon the response and feedback of Trial n only when the two trials were the same. It was concluded that feedback must influence the response probability vector associated with a given detection state.