Meaning before grammar: A review of ERP experiments on the neurodevelopmental origins of semantic processing

Psychonomic Bulletin & Review - According to traditional linguistic theories, the construction of complex meanings relies firmly on syntactic structure-building operations. Recently, however,...     

Food quantity discrimination in puppies (Canis lupus familiaris)

Animal Cognition - There is considerable evidence that animals are able to discriminate between quantities. Despite the fact that quantitative skills have been extensively studied in adult...     

Emergent Relations between Discriminative Stimuli,Responses, and Consequences in Intraverbals

The Psychological Record - We explored the emergence of relations between stimuli learned as discriminative, responses, and consequences with intraverbals. In Experiment 1, five 9- and 10-year-old...     

What Makes a Feminist? Predictors and Correlates of Feminist Social Identity in College Women

What factors predict self-identification as a feminist? College women ( N = 233) were given measures of feminist ideology, feminist identity development, evaluation of feminists, collectivism and individualism. Feminist identification was measured both as a dichotomous and a continuous variable. Measured dichotomously, feminist self-identification was predicted by not having conservative beliefs and having a positive general evaluation of feminists. In addition, self-identified feminists were more likely to believe in collective action, to hold liberal, radical, and womanist ideologies, and to endorse items in the Synthesis stage of identity development. They were less likely to believe a feminist is a lesbian, to endorse items in the Passive Acceptance stage, and to believe in the existence of a meritocracy. Measured continuously, degree of feminist identity was predicted by having a positive general evaluation of feminists, not having conservative beliefs, and endorsing items in the Revelation and Embeddedness/Emanation stages of identity development. The two measures of feminist identity were not entirely congruent, underlining the importance of methodological differences in measuring social identity.     

Bidirectional links in the network of multiplication facts

In three experiments, we tested the hypothesis that activation of multiplication operand nodes (e.g., 3 and 8) can occur through presentation of their product (e.g., 24). In Experiments 1 and 2 we found activation of the operands when the product was presented as a cue in a number-matching task. In Experiment 3, activation also occurred in a parity-matching task, where the product (24) was not relevant to the parity matching on its operands (3 and 8). We concluded that bidirectional links exist among the operands and their product for multiplication problems and these links can be activated in a purely stimulus-driven manner. We suggest this may constitute the basis for the solution of simple divisions by mediation through the complementary multiplication facts.     

Spatial representation of pitch height: the SMARC effect

Through the preferential pairing of response positions to pitch, here we show that the internal representation of pitch height is spatial in nature and affects performance, especially in musically trained participants, when response alternatives are either vertically or horizontally aligned. The finding that our cognitive system maps pitch height onto an internal representation of space, which in turn affects motor performance even when this perceptual attribute is irrelevant to the task, extends previous studies on auditory perception and suggests an interesting analogy between music perception and mathematical cognition. Both the basic elements of mathematical cognition (i.e. numbers) and the basic elements of musical cognition (i.e. pitches), appear to be mapped onto a mental spatial representation in a way that affects motor performance.     

Acculturation, parent-adolescent conflict, and adolescent adjustment in Mexican American families

We tested an acculturation model in a community sample of Mexican American families (146 mothers, 137 fathers, and 146 adolescents) that proposed that differences between parents and adolescents in acculturation would be associated with parent-adolescent conflict and adolescent adjustment problems. Contrary to hypotheses, we found that families who exhibited an acculturation gap were not more likely to report parent-adolescent conflict or adolescent adjustment problems. In fact, familial conflict and adolescent sexual experience were associated with high levels of acculturation among adolescents and their parents. Pending replication, these findings suggest that both parent and children acculturation may independently predict familial processes and youth outcomes, irrespective of an acculturation gap. Future research should consider other factors aside from acculturation differences that might account for parent-adolescent conflict and adolescent adjustment in Mexican American families.     

Domestic chicks perceive stereokinetic illusions

Stereokinetic illusions occur when certain 2-D patterns are set in slow rotation in a plane perpendicular to the line of sight. Such phenomena have never been investigated in animal species other than our own. We used the domestic chick (Gallus gallus) to check whether these illusions are experienced by non-human species, taking advantage of filial imprinting. Newly hatched visually naive chicks were individually exposed for 4 h to 2-D stimuli producing, to a human observer, the perception of a stereokinetic cone (experiment 1) or of a stereokinetic cylinder (experiment 2). Thereafter, each chick underwent a free-choice test between a solid 3-D cone and a solid 3-D cylinder. A control group of newly hatched but not imprinted chicks underwent the same testing procedure, to check for the presence of any spontaneous preference for one or other of the two solid objects. Imprinted chicks approached the 3-D stimulus closely resembling the stimulus they had been exposed to during imprinting (the cone in experiment 1 and the cylinder in experiment 2). Non-imprinted chicks did not show any preference. These results suggest that domestic chicks experience stereokinetic illusions.