Lay Epistemic Theory: The Motivational,Cognitive, and Social Aspects of Knowledge Formation

We review and integrate three separate research programs emanating from the theory of lay epistemics (Kruglanski, A. W. (1989). Lay Epistemics and Human Knowledge: Cognitive and Motivational Bases. New York: Plenum). The need for cognitive closure is an epistemic motivation that propels knowledge formation and has widely ramifying consequences for individual, interpersonal, and group phenomena. The unimodel investigates the process of new knowledge formation from the ‘information given.’ The work on epistemic authority highlights the centrality of social source effects, including the self as a source, in human epistemic behavior. These three research programs examine facets of epistemic behavior that function interdependently to produce the knowledge that guides individual and social functioning.     

Method and the Structure of Knowledge in Spinoza

It is argued, first, that although Spinoza's early Treatise on the Emendation of the Intellect does show evidence of a foundationalist approach to the justification of knowledge, there are good reasons to think he came to find such an approach unsatisfactory; and second, that the Ethics notion of certainty as adequate knowledge of one's knowledge is a justificational concept which is holistic in that any instance of such certainty depends on knowledge of the entire basic metaphysical system. Finally it is shown that Spinoza's having come to hold a nonlinear view regarding the justificational structure of knowledge explains why he chose to present his philosophy in the geometric form, and why he never succeeded in formulating a method of discovery.     

Studying Children’s Religious Knowledge: Contributions of Ethnography and the Clinical-Critical Method

We analyze different methodological and conceptual contributions of anthropology and psychogenetic theory to the research of children’s religious knowledge. We argue that for the study of children’s points of view it is possible to build an approach that links aspects studied by both disciplinary fields. With this aim, we revise some of their basic theoretical assumptions and recent reviews as well as their methodological proposals. Then we review the core characteristics of ethnography and the clinical–critical method—proposed by Piaget’s psychogenetic theory—with the goal of stressing their potentialities as well as their limitations in research. We argue that within an ethnographic approach, we must establish certain restrictions on the clinical–critical method following basic premises of social anthropology. This approach lets us demonstrate the importance of understanding children’s constructions by placing them within social relations that children produce and update in everyday interactions.     

Effects of motor congruence on visual working memory

Grounded-cognition theories suggest that memory shares processing resources with perception and action. The motor system could be used to help memorize visual objects. In two experiments, we tested the hypothesis that people use motor affordances to maintain object representations in working memory. Participants performed a working memory task on photographs of manipulable and nonmanipulable objects. The manipulable objects were objects that required either a precision grip (i.e., small items) or a power grip (i.e., large items) to use. A concurrent motor task that could be congruent or incongruent with the manipulable objects caused no difference in working memory performance relative to nonmanipulable objects. Moreover, the precision- or power-grip motor task did not affect memory performance on small and large items differently. These findings suggest that the motor system plays no part in visual working memory.     

Effect of circadian rhythms on retrieval-induced forgetting

This study investigated the effects of natural circadian rhythms on retrieval-induced forgetting (RIF; Anderson et al. in J Exp Psychol Learn Mem Cogn 20:1063–1087, 1994). Individuals tested at optimal times (i.e., morning persons tested in the morning and evening persons tested in the evening) showed a significantly greater RIF effect than individuals tested at non-optimal times (i.e., morning persons tested in the evening and evening persons tested in the morning). Thus, the limited quantity of resources available to allocate in the inhibitory activity during non-optimal times produced a significant decrement in RIF. These findings are compatible with the inhibitory account of RIF and with the notion of a resource-demanding process underlying this memory phenomenon.     

Association of personality with physical,social, and mental activities across the lifespan: Findings from US and French samples

Despite evidence for its health‐related benefits, little is known on the psychological predictors of the participation in leisure activities across the lifespan. Therefore, this study aimed to identify whether personality is associated with a variety of different types of activities, involving physical, cognitive, and social components. The samples included individuals from the second wave of the National Study of Midlife in the United States (N = 3,396) and community‐dwelling French individuals (N = 2,917) aged between 30 and 84. Both samples completed measures of the five‐factor model of personality. To create an activity index, we combined the physical, social, and cognitive (games and developmental) activities performed at least once a month. In both samples, individuals who scored higher on extraversion and openness were more likely to engage in a variety of activity types. The findings were consistent across two samples from different western societies and suggest that extraversion and openness contribute to social, cognitive, and physical functioning across the lifespan.     

Structural model of acculturation attitudes and related psychosocial variables: Empirical evidence in native Spaniards

This work falls within the framework of the study of acculturation processes of natives and immigrants. Its goal is to test an explanatory multi‐group model of natives' acculturation attitudes as a function of diverse psychosocial variables: Prejudice and natives' appraisal of their own culture (in a direct way) and inter‐group contact and perceived inter‐group similarity (in an indirect way). Participants were 499 Spaniards surveyed for their attitude towards Romanian immigrants and 493 towards Ecuadorian immigrants. The indicators used took into account three socio‐cultural spheres: peripheral, intermediate and central areas. This multi‐group model shows an adequate fit to the data.