Structural validity of miokinetic psychodiagnosis-revised and digitalyzed (MKP-RD) lineograms

In this study, we have applied a principal components analysis to the data obtained from a graphical record of motor behaviour performed without vision. The data was obtained from two samples, one made up of men and the other one made up of women. Hand dominance was controlled in both samples. Five independent factors were obtained: Factor I (Tendency to increase or decrease the length), Factor II (Tendency to deviate in a sagittal direction), Factor V (Tendency to deviate in a frontal direction); two factors (III and IV) were found in a transversal direction. This factor structure did not depend on sex, because the same structure was found in both sexes, nor it could be explained by learning, because the same factors appeared for each hand, except for Factors III and IV which were different for each hand. This study supports different motor dispositions as foundations of behaviour tendencies.     

Validation scheme and procedures to analyze consequential validity

The argument-based validation scheme guides assessment of the consequences of testing. The distinction between semantic inference and political inference allows us to combine the validation of the consequences in a single validation scheme. The validation process should produce evidence about the assumptions that support both types of inference. After presenting the validation scheme, we provide examples of its use in the assessment of the testing of two applications: the use of high-stake tests in educational contexts and the validation of adjustments made in standardized tests for people with disabilities. Finally, we propose procedures for the validation of consequences and we discuss the suitability of the argument-based validation scheme for the validation of the consequences of testing in Spain.     

ADHD Correlates, Comorbidity, and Impairment in Community and Treated Samples of Children and Adolescents

Patterns of correlates, comorbidity and impairment associated with attention-deficit hyperactivity disorder (ADHD) in children and youth were examined in representative samples from the community and from treatment facilities serving medically indigent youth in Puerto Rico. Information from caretakers and youths was obtained using the Diagnostic Interview Schedule for Children, (version IV), measures of global impairment, and a battery of potential correlates. In the community (N = 1,896) and the treated samples (N = 763), 7.5 and 26.2% of the children, respectively, met criteria for DSM-IV ADHD in the previous year. Although the prevalence rates and degree of impairment differed, the general patterns of correlates, comorbidity and impairment were similar in both populations. The exceptions were associated with conduct disorder, anxiety, impairment in the ADHD comorbid group, and age factors that appeared to be related to selection into treatment.     

Gender Stereotypes in Spanish Television Commercials

The objective of the present study was an analysis of gender stereotypes in television advertisements in Spain. For this purpose the content analysis method was used to analyze 400 advertisements broadcast during prime time over the three national television channels with the largest audience. A series of variables common to similar investigations were coded in order to allow comparisons with other countries. The data show significant gender differences for all variables. Comparison of results with those of other researchers shows that television advertising in Spain reveals gender stereotypes very similar to those found in advertising from countries with a geographic or cultural proximity.     

青少年的性节制：生活史的观点

生活史是研究身体发育与后代繁衍时间表的一种进化方法。本研究根据生活史理论调查与分析了13000余名“婚前节欲”性教育规划中青少年的性态度、性信念与性行为关系。因子分析结果显示,多种性信念和性态度可以整合成一个一般因子,性节制。可以假设,性节制是生活史策略的一个维度。性节制的表现主要包括：性自我克制的意愿、承认性抑制的个人和社会原因、积极肯定青少年的节欲行为、否认性行为的积极影响、回绝性行为的技能、以健康为由赞同性抑制,以及对宗教的虔诚与笃信等。研究结果显示,性节制因子上的低分与更频繁性行为有关,年龄与性别变量对二者关系没有影响。本文还探讨了性态度、性行为以及人类生活史间的关系     

Chimpanzee (Pan troglodytes) anticipation of food return: coping with waiting time in an exchange task

Despite controversial expectations that animals achieve reciprocal altruism, it is unclear if nonhuman species possess the necessary cognitive abilities. For reciprocal altruism, individuals must anticipate the loss of a commodity and accept a delay before some return. The authors investigated the abilities of 5 chimpanzees (Pan troglodytes) to cope with increasing waiting duration in exchange tasks. Subjects had to keep a small cookie before returning it to a human partner to obtain a larger piece. For a piece 2, 4, or 8 times the size of the small piece, 3 of the 5 subjects waited for up to 4 min. For a piece 40 times larger, 4 of the 5 subjects waited up to 8 min. At long time lag, renouncement to wait occurred earlier than predicted by subjects' general waiting capacity, suggesting that the decision to wait was based on a trade-off between reward quantity and expected costs of the waiting duration. Chimpanzees could anticipate a delayed reward at a time scale of several minutes. If this reflects a cognitive limit in chimpanzees' anticipation capacity, reciprocal altruism by keeping track of costs and benefits over extended periods may be unlikely in chimpanzees.     

The role of mechanism and covariation information in causal belief updating

The present study is aimed at identifying how prior causal beliefs and covariation information contribute to belief updating when evidence, either compatible or contradictory with those beliefs, is provided. Participants were presented with a cover story with which it was intended to activate or generate a causal belief. Variables related to the prior belief (the type of information, the strength of the cause-effect causal link, and how confident the participant was that the link existed) were assessed. Subsequently, participants were presented with covariational information and were asked to update their beliefs in light of the new evidence. Information reliability, prior belief's causal influence magnitude, and the cause-effect level of contingency portrayed by the new information--but not the type of the prior belief--are shown to directly determine belief updating.     

Gender differences in physical aggression: A prospective population-based survey of children before and after 2 years of age

There has been much controversy over the past decades on the origins of gender differences in children's aggressive behavior. A widely held view is that gender differences emerge sometime after 2 years of age and increase in magnitude thereafter because of gender-differentiated socialization practices. The objective of this study was to test for (a) gender differences in the prevalence of physical aggression in the general population of 17-month-old children and (b) change in the magnitude of these differences between 17 and 29 months of age. Contrary to the differential socialization hypothesis, the results showed substantial gender differences in the prevalence of physical aggression at 17 months of age, with 5% of boys but only 1% of girls manifesting physically aggressive behaviors on a frequent basis. The results suggest that there is no change in the magnitude of these differences between 17 and 29 months of age.     

Working memory deficits in transgenic rats overexpressing human adenosine A2A receptors in the brain

Adenosine receptors in the central nervous system have been implicated in the modulation of different behavioural patterns and cognitive functions although the specific role of A(2A) receptor (A(2A)R) subtype in learning and memory is still unclear. In the present work we establish a novel transgenic rat strain, TGR(NSEhA2A), overexpressing adenosine A(2A)Rs mainly in the cerebral cortex, the hippocampal formation, and the cerebellum. Thereafter, we explore the relevance of this A(2A)Rs overexpression for learning and memory function. Animals were behaviourally assessed in several learning and memory tasks (6-arms radial tunnel maze, T-maze, object recognition, and several Morris water maze paradigms) and other tests for spontaneous motor activity (open field, hexagonal tunnel maze) and anxiety (plus maze) as modification of these behaviours may interfere with the assessment of cognitive function. Neither motor performance and emotional/anxious-like behaviours were altered by overexpression of A(2A)Rs. TGR(NSEhA2A) showed normal hippocampal-dependent learning of spatial reference memory. However, they presented working memory deficits as detected by performance of constant errors in the blind arms of the 6 arm radial tunnel maze, reduced recognition of a novel object and a lack of learning improvement over four trials on the same day which was not observed over consecutive days in a repeated acquisition paradigm in the Morris water maze. Given the interdependence between adenosinic and dopaminergic function, the present results render the novel TGR(NSEhA2A) as a putative animal model for the working memory deficits and cognitive disruptions related to overstimulation of cortical A(2A)Rs or to dopaminergic prefrontal dysfunction as seen in schizophrenic or Parkinson's disease patients.