Parieto-occipital areas involved in efficient filtering in search: A time course analysis of visual marking using behavioural and functional imaging procedures

Search for a colour-form conjunction target can be facilitated by presenting one set of distractors prior to the second set of distractors and the target: the preview benefit (Watson & Humphreys, 1997). The early presentation of one set of distractors enables them to be efficiently filtered from search. We report two studies investigating the time course of the preview benefit. In Experiment 1 we use a standard reaction time analysis to show that the benefit has a relatively slow time course; old items need to precede the new set by 600 ms or more in order to be fully filtered from search. Furthermore, the reductions in reaction time across time in the preview condition varied nonlinearly with the display size, suggesting that old items were discounted from search in parallel. In Experiment 2 we examined the neural locus of this filtering effect over time, using positron emission tomography (PET). We show that regions of parieto-occipital cortex are selectively activated in a preview search condition relative to a detection baseline. These regions also increase in activation as the preview interval increases (and search then becomes easier), consistent with them modulating the parallel filtering of distractors from targets in spatial search. Interestingly, the same areas as those activated in preview search were also active in conjunction search relative to its own detection baseline. Thus these regions either modulate parallel filtering in conjunction search too, or they modulate different behavioural functions according to task constraints.     

Political Screenings as Trials of Strength: Making the Communist Power/lessness Real

In this paper, we discuss the problem of communist power in so called totalitarian regimes. Inspired by strategies of explanation in contemporary science studies and by the ethnomethodological conception of social order, we suggest that the power of communists is not to be taken as an unproblematic source of explanation; rather, we take this power as something that is itself in need of being explained. We study personal narratives on political screenings that took place in Czechoslovakia in 1970 and analyze how the power of communists obtained its strength from ordinary and “unremarkable” interactions between participants. The screenings are interpreted, in the terms of Bruno Latour, as “trials of strength.” We show that it was crucial for all the participants that associations, translations or mobilizations involved in making the regime real, remained partial and multiple, and not exclusive and “total” as is often assumed within dominant discourses on totalitarianism.     

Emotional Availability of Parents and Psychological Health: What Does Mediate This Relationship?

The relationship and interaction between a parent and child is of an ever-changing nature. In the first years of the child, parents are more supportive of the child’s development and guide the changes that take place. When adolescence ends and child becomes an adult, parent–child relationship takes on a different pattern in which the relation is more egalitarian. Despite this changing nature, research findings demonstrate that children who continue to receive emotional support from their parents, feel attached to them and care about their contributions and support. Thus, it becomes important to evaluate how certain parental properties affect psychological health within this changing relationship structure. From this point of view, this study examines the mediator role of emotion regulation skills, interpersonal relationship styles, and perceived social support on the relationship between parental emotional availability and general psychological health of individuals aged 16–25 who still live with their parents. It has been found that difficulty in emotion regulation, interpersonal relationship style, and social support has complete mediation effect on the relationship between both maternal and paternal emotional availability and psychological health.     

The Happy Farmer: Self-Employment and Subjective Well-Being in Rural Vietnam

Using a unique survey data set this paper documents a positive effect of self-employment in farming on subjective well-being. This direct effect is only partly offset by negative, indirect effects working through income and other variables. These findings are interpreted as effects of self-employment in farming on perceived autonomy, competence and relatedness. The results suggest that economic transformation is associated with a psychological cost, which may contribute to explaining earnings gaps between sectors and types of employment. We also investigate other determinants of happiness, and for example find strong positive effects of own income and strong negative effects of neighbors’ income, suggesting the importance of relative rather than absolute levels of income.