García-Pérez Ángel, García-Fernández Gloria, Krotter Andrea, González-Roz Alba, Martínez-Loredo Víctor, Secades-Villa Roberto
Department of Psychology. Addictive Behaviors Research Group. University of Oviedo, Plaza Feijoo, s/n, 33003, Oviedo, Spain; Department of Psychology, Sociology and Philosophy. University of Leon, Facultad de Educación, Campus de Vegazana, s/n, 24071, Leon, Spain.
Department of Psychology. Addictive Behaviors Research Group. University of Oviedo, Plaza Feijoo, s/n, 33003, Oviedo, Spain.
Appetite. 2023 Jun 1;185:106549. doi: 10.1016/j.appet.2023.106549. Epub 2023 Mar 31.
Obesity is a major health problem associated with disease burden and mortality. In this context, analyzing food as a powerful reinforcer from a behavioral economics framework could be relevant for the treatment and prevention of obesity. The purposes of this study were to validate a food purchase task (FPT) in a clinical sample of Spanish smokers with overweight and obesity and to assess the internal structure of the FPT. We also analyzed the clinical utility of single-item breakpoint (i.e., commodity price that suppresses demand). A total of 120 smokers [% females: 54.2; M = 52.54; SD = 10.34] with overweight and obesity completed the FPT and weight/eating-related variables. Principal component analysis was used to examine the FPT structure, and a set of correlations were used to examine the relationship between the FPT, eating and weight-related variables. The FPT demonstrated robust convergent validity with other measures of eating. Higher food demand was related to higher food craving (r = .33), more binge eating problems (r = .39), more weight gain concerns (r = .35), higher frequency of both controlled (r = .37) and uncontrolled (r = .30) grazing, as well as to an eating style in response to emotions (r = .34) and external eating (r = .34). Of the demand indices, Intensity and O showed the highest magnitudes of effects. The FPT factors, persistence and amplitude, do not improve individual FPT indices; and the single-item breakpoint was not related to any eating or weight variable. The FPT is a valid measure of food reinforcement with potential clinical utility in smokers with obesity/overweight.
肥胖是一个与疾病负担和死亡率相关的主要健康问题。在这种背景下，从行为经济学框架分析食物作为一种强大的强化物可能与肥胖的治疗和预防相关。本研究的目的是在超重和肥胖的西班牙吸烟者临床样本中验证一项食物购买任务（FPT），并评估FPT的内部结构。我们还分析了单项断点（即抑制需求的商品价格）的临床效用。共有120名超重和肥胖的吸烟者[女性比例：54.2%；M = 52.54；SD = 10.34]完成了FPT以及与体重/饮食相关的变量。主成分分析用于检验FPT的结构，一组相关性用于检验FPT、饮食和体重相关变量之间的关系。FPT与其他饮食测量方法显示出强大的收敛效度。更高的食物需求与更高的食物渴望（r = 0.33）、更多的暴饮暴食问题（r = 0.39）、更多的体重增加担忧（r = 0.35）、更高频率的有节制（r = 0.37）和无节制（r = 0.30）进食，以及对情绪的饮食风格反应（r = 0.34）和外部进食（r = 0.34）相关。在需求指数中，强度和O显示出最高的效应量。FPT因素，持续性和幅度，并没有改善个体FPT指数；并且单项断点与任何饮食或体重变量均无关联。FPT是一种有效的食物强化测量方法，对肥胖/超重吸烟者具有潜在的临床效用。
