Exceptional reported effects and data anomalies merit explanation from “A randomized controlled trial of coordination exercise on cognitive function in obese adolescents” by Liu et al. (2018)

We read the article in Psychology of Sport and Exercise by Liu et al. (“A randomized controlled trial of coordination exercise on cognitive function in obese adolescents”) with great interest. Our interest in the article stemmed from the extraordinary differences in obesity-related outcomes reported in response to a rope-jumping intervention. We requested the raw data from the authors to confirm the results and, after the journal editors reinforced our request, the authors graciously provided us with their data. We share our evaluation of the original data herein, which includes concerns that weight and BMI loss by the intervention appears extraordinary in both magnitude and aspects of the distributions. We request that the authors address our findings by providing explanations of the extraordinary data or correcting any errors that may have occurred in the original report, as appropriate.     

‘It’s not a diet,it’s a lifestyle’: a longitudinal,data-prompted interview study of weight loss maintenance

Objective: To advance understanding of the individual and environmental factors underpinning weight loss maintenance. Design: Semi-structured, data-prompted interviews were conducted with twelve overweight adult participants (three men, nine women) who had lost over 5% of their body weight in the year before baseline. Participants gathered daily data through wireless scales, activity monitors (Fitbit?), ecological momentary assessment and experience sampling (taking photographs, writing notes). They were interviewed at 3- and 6-months post baseline. Interview stimuli included personal data of weight and activity graphs, correlations of psychological factors, and self-generated notes and photographs. Interview data were analysed using the Framework Method, applying pre-specified maintenance-relevant theoretical themes. Results: The theoretical Framework provided a good fit for the narratives, with five main themes underpinning successful weight loss maintenance: sustained motivation, effective self-regulation, plentiful resources, habit formation and a supportive environment. Additionally, participants reported an identity shift from being a dieter to accepting a new healthy lifestyle. Goal prioritising and allowing for occasional controlled lapses enhanced weight loss maintenance. Conclusions: This study successfully used the novel method of data-prompted interviews to explore weight loss maintenance experiences with new explanations emerging from the data. Future research should further develop behaviour change maintenance theory and data-prompted interview method.     

When do keepsakes keep us together? The effect of separation from a partner on directing attachment to inanimate objects

Prior research has often limited the coping potential of inanimate objects to being cues for nostalgia. This article proposes that, due to an unavoidable separation from a loved one, individuals might adhere to an intuitive view that their loved one remains present in inanimate objects associated with him or her. Directing attachment behavior to inanimate objects associated with a loved one can be an effective strategy for maintaining subjective closeness to the partner. In Study 1, participants who imagined being trapped on a deserted island (vs. being together) were more likely to express both attachment to a photograph of their partner and nostalgia. Nostalgia, however, led to the anticipation that having the photograph would exacerbate the situation. Studies 2 and 3 demonstrated that adults experiencing real‐life separation were more likely than controls to direct their attachment to inanimate objects that decreased loneliness and increased closeness to one's partner. The distinctive role of attachment to inanimate objects as a coping strategy is further discussed.     

Bittersweet: a qualitative exploration of mothers’ experiences of raising a single surviving twin

Loss of a child from a multiple birth pregnancy is not uncommon yet the idiographic experience of parents who have lost a single twin from a multiple birth pregnancy is underexplored. This novel study sought to explore the experiences of mothers bereaved after loss of a twin from a multiple birth pregnancy, focusing on the dual challenges of parenting and grieving. Eighteen mothers at least 12 months post loss were recruited from a private UK based Facebook page dedicated to supporting parents after loss from a multiple birth. Eligible mothers completed an independent qualitative open-ended survey to explore maternal experiences of loss. Data were analysed using Thematic Analysis. Findings represented a sense of duality for participants, with mothers experiencing conflict between roles and identities as well as the nature of their loss. Key themes identified include ‘Narrating a story of family and loss’, ‘Finding a place for the twins within the family’ and ‘A changing sense of self’. Findings fit with theoretical conceptualisations of bereavement that acknowledge retaining relationships with the deceased. Practically, suggestions for supporting mothers to identify stock answers to often asked questions about family make up were suggested.     

A comparison of acceptance- and control-based strategies for coping with food cravings: an analog study

The present study utilized an analog paradigm to investigate the effectiveness of two strategies for coping with food cravings, which was theorized to be critical to the maintenance of weight loss. Ninety-eight undergraduate students were given transparent boxes of chocolate Hershey's Kisses and instructed to keep the chocolates with them, but not to eat them, for 48 h. Before receiving the Kisses, participants were randomized to receive either (a) no intervention, (b) instruction in control-based coping strategies such as distraction and cognitive restructuring, or (c) instruction in acceptance-based strategies such as experiential acceptance and defusion techniques. Measures included the Power of Food Scale (PFS; a measure of psychological sensitivity to the food environment), self-report ratings of chocolate cravings and surreptitiously recorded chocolate consumption. Results suggested that the effect of the intervention depended on baseline PFS levels, such that acceptance-based strategies were associated with better outcomes (cravings, consumption) among those reporting the highest susceptibility to the presence of food, but greater cravings among those who scored lowest on the PFS. It was observed that craving self-report measures predicted chocolate consumption, and baseline PFS levels predicted both cravings and consumption. Results are discussed in terms of the implications for weight loss maintenance strategies.