Short-term visual memory for contour curvature in a delayed discrimination task

Abstract: A two-interval forced-choice of constant stimuli was used to measure the point of subjective equality (PSE) and discrimination threshold for standard contour curvature (1.91, 3.24 deg⁻¹) held in short-term visual memory (STVM). At both standard curvatures, the PSE for remembered curvature was nearly constant for standard curvature from 2 s to 16 s retention intervals, while the discrimination threshold increased as a linear function of retention interval. These results show that the decay in STVM for contour curvature is due to the noisy representation of curvature, neither to fading of the represented curvature nor to converging to the constant curvature. Furthermore, the Weber fraction was nearly constant for both standard curvatures at any delay from 2 to 16 s.     

Optimal human functioning around the world: A new index of eudaimonic well-being in 166 nations

As more and more people realize that wealth fails to fully capture the essence of human well-being, interest in non-monetary measures of well-being has intensified. Eudaimonic well-being (EWB; i.e., optimal psychosocial functioning) is a largely overlooked aspect of national well-being that has never been examined at the global level. This study uses data from nearly 1,800,000 respondents recruited probabilistically from 166 countries between the years of 2005 and 2017 to construct an index of EWB. EWB demonstrates moderate positive associations with other quality-of-life indicators (i.e., national life satisfaction, national prosperity, overall quality of life, and gross domestic product), indicating that it captures information not reflected by them. The distribution of EWB at national, regional, and global levels, as well as its global trend, is explored. The study also examines the relationships between EWB and a number of theoretically related individual- and country-level variables. Presented are also the results of multilevel modelling including a wide range of predictors.     

Fluctuations of answer and confidence rating in a general-knowledge problem task: Is confidence rating a result of direct memory-relevant output monitoring?

In order to examine whether confidence rating is a result of direct memory-relevant output monitoring, a general-knowledge test was used. A question set was answered in experimental session 1, and the same question set was employed in session 2. Subjects chose one answer from two alternatives. No significant difference in answer accuracy was found between sessions, which suggests that identical information processing was carried out, and that any difference between sessions was based on probabilistic fluctuation. The major results were as follows: (a) In both sessions, answer accuracy was an increasing function of confidence. (b) Answer-change rate (rate of different answers to the same question between sessions) decreased monotonically with confidence. (c) The distributions of confidence rating in session 2, conditional on the rating in session 1, were nearly identical in no-answer-change and answer-change cases. These results suggest that confidence rating is not a result of monitoring memory-relevant output itself but an estimation of possibility of answer fluctuation.     

Country roads,take me home… to my friends: How intelligence,population density,and friendship affect modern happiness

We propose the savanna theory of happiness, which suggests that it is not only the current consequences of a given situation but also its ancestral consequences that affect individuals’ life satisfaction and explains why such influences of ancestral consequences might interact with intelligence. We choose two varied factors that characterize basic differences between ancestral and modern life – population density and frequency of socialization with friends – as empirical test cases. As predicted by the theory, population density is negatively, and frequency of socialization with friends is positively, associated with life satisfaction. More importantly, the main associations of life satisfaction with population density and socialization with friends significantly interact with intelligence, and, in the latter case, the main association is reversed among the extremely intelligent. More intelligent individuals experience lower life satisfaction with more frequent socialization with friends. This study highlights the utility of incorporating evolutionary perspectives in the study of subjective well‐being.     

Family Environments and Children's Executive Function: The Mediating Role of Children's Affective State and Stress

There is increasing evidence that inadequate family environments (family material environment and family psychosocial environment) are not only social problems but also factors contributing to adverse neurocognitive outcomes. In the present study, the authors investigated the relationship among family environments, children's naturalistic affective state, self-reported stress, and executive functions in a sample of 157 Chinese families. These findings revealed that in inadequate family material environments, reduced children's cognitive flexibility is associated with increased naturalistic negative affectivity and self-reported stress. In addition, naturalistic negative affectivity mediated the association between family expressiveness and children's cognitive flexibility. The authors used a structural equation model to examine the mediation model hypothesis, and the results confirmed the mediating roles of naturalistic negative affectivity and self-reported stress between family environments and the cognitive flexibility of Chinese children. These findings indicate the importance of reducing stress and negative emotional state for improving cognitive functions in children of low socioeconomic status.     

Attitudes toward health-messages: The link between perceived attention and subjective strength

IntroductionMany efforts are invested in promoting healthy attitudes and behaviors; nonetheless there is no clear, definitive evidence of sustained effectiveness of those efforts in all cases.ObjectiveThe present study examined the role of perceived attention in changing attitudes toward vegetable consumption as well as the perceived stability and resistance of those changes (attitude strength).MethodParticipants were randomly assigned to read a strong or weak health communication arguing in favor of vegetable consumption. After reading the message, participants reported attitudes toward this health issue, the perceived attention, and the perceived strength associated with their evaluations.ResultsParticipants who reported high (vs. low) perceived attention showed a greater effect of argument quality on persuasion. Furthermore, such participants also reported stronger attitudes compared to those who reported low perceived attention.ConclusionThis study showed that attitudes toward vegetable consumption can be changed after reading a persuasive message, and that the extent of perceived attention moderated the extent to which those changes were perceived as stable and resistant (stronger attitudes).     

Happiness and life satisfaction in Rwanda

This study investigated predictors of happiness and life satisfaction in Rwanda. Data from the World Values Survey and gathered from 3 030 Rwandese (age ranging 16 to 90 years, mean age = 34.2, SD = 12.7; females = 50.5%) were pooled for the analysis. For the comparison, international World Values Survey data were utilised. A fixed effects multilevel regression model was used to predict happiness and life satisfaction from gender, health, socio-economic, and some subjective measures. Males had greater self-rated happiness and life satisfaction scores than females. State of health and sense of freedom of choice predicted both happiness and life satisfaction. Valuing of friends, weekly religious attendance, and national pride positively predicted happiness, whereas household’s financial satisfaction, full-time employment, high-income group, being a student, and sense of trust predicted life satisfaction. This study suggests that health status, household’s financial satisfaction and emancipative values could maximise subjective well-being in Rwanda.     

情景知觉中的信息界定:从主观预期到“惊奇”算法

情景信息加工是情景知觉研究领域内的核心问题。然而,不同的研究者对"情景信息"的界定并不相同。在过去80多年的时间里对情景信息的界定先后经历了研究者主观确定、观察者评估、基于情景物理特征的计算模拟等方法。Itti和Baldi等人通过比较先验概率和后验概率之间的差异,提出了"惊奇"理论。文章介绍了真实情景知觉研究中"惊奇"理论的应用及进展,并指出"惊奇"算法的拓展及界定、情景知觉过程中的注意转换与"惊奇"的关系,以及社会情景知觉中的"惊奇"应用可能是未来相关领域需要进一步探索的问题。     

Happiness vs. mindfulness exercises for individuals vulnerable to depression

An online ‘positivity’ exercise involving the practice of discrete positive emotions was pitted against a mindfulness meditation exercise and an active placebo control. The effects of positivity and meditation were examined in relationship to personality variables known to entail vulnerability to depression. Participants (N = 741) were randomly assigned to the positivity, mindfulness, or control condition. They completed their exercise for three weeks and were assessed on measures of subjective well-being at baseline, post-test, and one, and two months later. Results indicated that all groups showed significant decreases in depressive symptoms from baseline to two months. The positivity exercise uniquely predicted increases in meaning, pleasure, engagement, and satisfaction in life across follow-ups. Dependent individuals responded favorably to the positivity intervention in the short run, but worsened in the long run for pleasure-related happiness. Self-criticism was associated with significantly greater gains in life satisfaction following exercise completion.