Obesity Bias in Children: The Role of Actual and Perceived Body Size

The aim of this study was to examine how children perceive their body size and whether their actual or perceived body size can explain their anti‐fat views. Four hundred and fourteen 5–6, 7–8 and 9–10‐year‐old children were read short vignettes depicting two characters, one possessing a positive and the other a negative quality. Following each vignette, participants were asked to pick the story characters among thin, average and obese figures. Obesity bias was defined as the attribution of the positive quality to the thin or average figure and the corresponding negative one to the obese. Body mass index determined children's actual body size. Perceived body size was determined with the use of Collins' (1991) figures of increasing size. The results showed that actual body size affected the accuracy of perceived body size. While the majority of average children were accurate at identifying their body size, most overweight and obese children tended to underestimate it. The accuracy of body size perception improved with age. Obesity bias did not relate to children's actual but to their perceived body size: Those who perceived themselves as heavier exhibited less bias. The implications of the findings are discussed in relation to children's developing identity, and suggestions are made for future research. Copyright © 2014 John Wiley & Sons, Ltd.     

The Impact of Asymmetric Partial Feedback on Response‐Bias

For many decisions we make, we are more likely to receive feedback about some outcomes than about others, and thus we must operate under conditions of asymmetric partial feedback. In this paper, we examine the effects of asymmetric partial feedback on decision making across three experiments. Experiment 1 examines the effects of four partial feedback schedules on decision making in a single‐attribute auditory detection task. Experiment 2 examines these same schedules in the context of a simulated experiment in which virtual participants perform a multi‐attribute choice task. Experiment 3 then examines effects of one partial feedback schedule representative of a real‐world decision‐making domain (personnel selection) using an ecologically informed multi‐attribute choice task. All three experiments reveal that asymmetric partial feedback primarily impacts on response‐bias, a parameter of signal detection theory. These findings can be explained in terms of decision makers' attempts to maximize accuracy and the fact that shifts in response‐bias will, under partial feedback, produce misleading impressions of greater accuracy. Copyright © 2013 John Wiley & Sons, Ltd.     

吸烟者对香烟相关线索注意偏向的研究述评

吸烟者对香烟相关线索的注意偏向近年来颇受研究界青睐,现有研究大都集中在吸烟者注意偏向的理论解释、研究范式、发生状况以及与吸烟成瘾的关系等方面。其中,在理论解释上形成了诱因敏感、自动行动图式、诱因习惯和目前关注等理论;在研究范式上主要有成瘾stroop任务、点探测任务和线索调控的惊跳测试;在发生状况上涉及发生的被试特征、发生的意识状态、发生的注意阶段、发生的生化基础;在与吸烟成瘾的关系上包括与主观渴求和与觅烟行为的关系。鉴于目前研究所限,未来研究需纳入线索-靶子等研究范式,以深入探讨吸烟者注意偏向的发生阶段及其与吸烟成瘾的关系,进而发现吸烟者注意偏向的特异性之所在。     

大学生对穷人的消极刻板印象及猜测偏向

主要考察大学生对穷人的消极刻板印象及猜测偏向。实验1中的两个单类内隐联想测验结果与前人研究基本一致：虽然被试对穷人热情的评价相对积极,但总体上认为穷人低能力、低热情。实验2通过源监测任务发现,在忘记特质词来源的情况下,被试倾向于猜测消极特质词来自贫困者,积极特质词来自小康者。研究不仅证实了大学生对穷人的消极刻板印象,而且进一步发现大学生存在对穷人的消极猜测偏向。     

The impact of emotional expressions on children’s trust judgments

Research on the development of selective trust has shown that young children do not indiscriminately trust all potential informants. They are likely to seek and endorse information from individuals who have proven competent or benign in the past. However, research on trust among adults raises the possibility that children might also be influenced by the emotions expressed by potential informants. In particular, they might trust individuals expressing more positive emotion. Indeed, young children’s trust in particular informants based on their past behaviour might be undermined by their currently expressed emotions. To examine this possibility, we tested the selective trust of fifty 4- and 5-year-olds in two steps. We first confirmed that children are likely to invest more trust in individuals expressing more positive emotion. We then showed that even if children have already formed an impression of two potential informants based on their behavioural record, their choices about whose claims to trust are markedly influenced by the degree of positive emotion currently expressed by the two informants. By implication, the facial emotions expressed by potential informants can undermine young children’s selective trust based on the behavioural record of those informants.     

Self‐oriented perfectionism and its relationship to selective attention: An experimental examination using social cognitive paradigm1

The cognitive biases associated with perfectionism include a selective attention to failure and the discounting of success. The present study experimentally focused on the relation between self‐oriented perfectionism (SOP) and selective attention using the social cognitive paradigm. Forty undergraduate students who were identified as either high or low in SOP were asked to perform modified versions of the Stroop task. The results suggest that participants with high SOP did not take longer to respond to failure words than to neutral words, but their reaction time to failure words was longer than that of participants with low SOP. These findings provided the basis for cognitive behavioral biases for perfectionism.     

Self-reference is a fast-acting automatic mechanism on emotional word processing: evidence from a masked priming affective categorisation task

This study examined the impact of self-referential information at early stages of emotional word processing using an affective masked-priming paradigm in which positive (e.g, espetacular[awesome]) and negative (e.g., horrível[awful]) trait-adjectives were preceded by briefly primes that could be self-related (Eu sou[I am]), other-related (Ela é[She is]), or a control (%%%%%). Trait-adjectives were selected from female norms and only females participants were used to control for sex differences. Results showed that positive words were categorised faster when preceded by self-related primes than by other-related primes, though not control primes. Negative trait-adjectives were not modulated by the type of prime, even though participants were slower when they were preceded by other-related than by control primes. These findings demonstrate that taking the other-perspective entails a cost, and that the amount of priming produced by self-related and control primes was virtually the same, thus suggesting that assuming the self-perspective is a cognitively effortless process.     

判断与决策中的证实性偏差

证实性偏差是指个体在决策时, 倾向于有意或无意地寻找支持已有信念、预期或假设的信息和解释, 忽视可能与之不一致的信息和解释。目前, 研究者主要从肯定检验策略、认知失调理论以及错误规避三个方面解释证实性偏差的心理机制。证实性偏差还受到条件性参考框架、任务的抽象性、个体经验以及认知闭合的需要等因素的影响。虽然证实性偏差不能完全消除, 但是可以通过竞争性假设分析法和考虑对立面的方法降低其程度。未来的研究可以从证实性偏差的产生根源、研究范式、群体决策中的证实性偏差以及拓展应用研究这四个方面进行探讨。     

Effects of chronic exercise on attentional bias among individuals with methamphetamine use disorder

BackgroundIndividuals with substance use disorder show attentional bias toward drug-related cues, which may be associated with attentional control deficits. Although exercise improves attention in healthy people, whether individuals with substance use disorder also benefit is unknown. We explored the effects of chronic exercise on behavioral and neural correlates of attentional bias in men with methamphetamine use disorder.MethodsSixty-one such men were randomized to high- or moderate-intensity exercise or to a control group with little exercise for 12 weeks. The dot-probe task assessed attentional bias before and after exercise intervention, with event-related potentials recorded during the task to determine underlying neural mechanisms.ResultsAttentional bias scores and event-related potential amplitudes significantly decreased after high- or moderate-intensity chronic exercise, but not in controls.ConclusionsChronic exercise reduces attentional bias in individuals with methamphetamine use disorder by enhancing early identification of drug-related stimuli and diverting attention to reduce conflict processing.     

Postnatal mental health and mothers’ processing of infant emotion: an eye-tracking study

ABSTRACT

Background

Postnatal mental illnesses are associated with less maternal sensitivity. Differences in how mothers with and without mental illness process infant emotions could explain this. People with mental illness in non-perinatal populations show certain processing patterns when viewing emotional faces, but it is not clear whether these patterns are present in mothers.