Exercise Improves Cognitive Control: Evidence from the Stop Signal Task

The aim of this study was to test the hypothesis that exercise improves executive control. We compared the performance of physically active and passive young participants in two versions of the stop signal task: a strategic (more executive) and a standard version. The results showed that active participants were more efficient than passive at inhibiting a response in the strategic version, suggesting that (1) physical exercise appears positively associated with improved cognitive control in healthy young participants, adding to evidence gathered in children, aging and clinical populations; and that (2) the strategic version of the stop signal task constitutes a more sensitive task than executive tasks previously used. Although the data point out a link between physical activity and executive control, they also have potential practical implications for health authorities and the general public by strengthening the view that exercise, beyond its physical health benefits, also has positive effects on cognitive functioning. Copyright © 2013 John Wiley & Sons, Ltd.     

Feasibility,Acceptability, and Preliminary Outcomes of the Fortalezas Familiares Intervention for Latino Families Facing Maternal Depression

This pilot study examined the feasibility, acceptability, and preliminary outcomes of a linguistically and culturally adapted intervention for immigrant Latina mothers with depression and their families. Fortalezas Familiares (Family Strengths) is a community‐based, 12‐week, multifamily group intervention that aims to increase communication about family processes leading up to and affected by the mother's depression, build child coping and efficacy, enhance parenting competence and skills, and promote cultural and social assets within the family. In terms of feasibility, of 16 families who enrolled and participated in the intervention, 13 families attended more than 90% of meetings and completed the intervention. Posttests reported positive changes following the intervention, including improved psychological functioning, increased family and marital support, and enhanced family functioning, as reported by mothers and other caregivers. Mothers also reported decreased conduct and hyperactivity problems among their children. Children reported positive changes in their psychological functioning and coping, parenting warmth and acceptance, and overall family functioning. Postintervention focus groups and surveys measuring acceptability revealed families' satisfaction with the intervention and suggested areas of improvement. We discuss similarities and differences in outcomes between the adapted intervention, Fortalezas Familiares, and the original intervention, Keeping Families Strong, and propose future areas of intervention adaptation and development.     

Preschool Children’s Beliefs about Gender Differences in Academic Skills

Evidence from different Latin American countries shows a gap in the academic achievement of girls and boys. Chilean children’s achievement is a case in point, with the gender gap being especially large for mathematics achievement. These differences can be explained partly from the viewpoint of beliefs and implicit theories. Research in this field has focused mainly on elementary and secondary students, and there is no relevant data on preschool children. This study examines Chilean kindergarten children’s beliefs about differences in the academicals skills of girls and boys. Eighty-one preschool children (34 girls, mean age 5 years and 11 months) were recruited from schools serving a middle SES population from downtown Santiago. An instrument to test children’s implicit beliefs about gender differences in academic ability was adapted from previous research. Results support the hypothesis that boys and girls at the age of 5 already hold stereotypical expectations about boys’ and girls’ academic achievement. When asked about which school subject a character liked more, was better at, and found easier, participants showed no preference between math and language when reasoning about a male character, but they indicated that a female character would find math harder, perform worse at it, and like it less than language. These responses did not differ according to the gender of the participating children. Implications of these findings are addressed and limitations and future research are discussed.     

Evaluation of consequences of test use in validity theory

There is little doubt about the importance of validity during the compilation and evaluation of tests. Nevertheless, intense debate has arisen with regard to incorporating the consequences of test use as a further source of evidence in the most recent edition of the AERA, APA, NCME Standards . After reviewing the historical antecedents of the issue and the main lines of approach of both defenders and critics, this paper sets out the arguments which may be used in answer to the question: 'At what point should the analysis of the consequences of test use become part of validation?' The response of the AERA, APA, NCME Standards has clear similarities with the perspective adopted towards the consideration of bias in tests as a problem of validity. Finally, the paper describes how consequence validation may be subject to tension arising from the evolution of notions of justice in test use.     

Inner speech as a retrieval aid for task goals: the effects of cue type and articulatory suppression in the random task cuing paradigm

Articulatory suppression has been shown to increase switch costs in the list paradigm (e.g., [J. Exp. Psychol.: General 130 (2001) 641, J Memory Language 48 (2003) 148]). The present dual-task study examined whether this effect generalizes to the random task cuing paradigm. Participants performed color or shape judgments according to explicit word cues (COLOR or SHAPE) or less transparent letter cues ( C for the color task and S for the shape task). In the word cue condition, the switch cost was equivalent for the articulatory suppression and the control (no dual-task) conditions, but, in the letter cue condition, the switch cost was significantly greater for the articulatory suppression condition than for the control condition. These results suggest that inner speech may be recruited as a tool for retrieving and activating the relevant task goal when the task cue is not transparent and hence imposes nonnegligible retrieval demand.     

Mexican-American adolescent sexuality and sexual knowledge: an exploratory study

This article reports the findings of a study designed to examine the sexual knowledge, attitudes, and practices of low-income Mexican- American adolescents. The participants in the study were all about to begin a sex education program in a community health organization in East Los Angeles. The study involved 84 adolescents aged 14-19, 97% of who identified themselves as Mexican-American (the remainder identified themselves as Latino). 51 of the subjects were female and 33 male. The participants completed a 43-item questionnaire concerning demographics, sexual experience and contraceptive use, knowledge of birth control methods, and attitudes towards sexuality and birth control. Only 18 (21%) of the subjects indicated ever having sex. But among this group, 83% reported not using contraception during their last intercourse, and 61% reported never using contraception. Only 22% reported using contraception regularly. Concerning the knowledge of different birth control methods,many of the participants were able to list several methods, but their responses indicated a lack of accurate and specific knowledge about contraceptive methods. In addition to the 43-item questionnaire, 27 of the subjects also completed a sexual and contraceptive knowledge questionnaire. The topics included contraceptive effectiveness, the menstrual cycle, and fertilization. The scores on the questionnaire were low, with an average score of 33% of correct answers. Finally, all 84 participants responded to a sexual attitude questionnaire, which revealed a generally traditional attitude toward the importance of have children, virginity, and the relationship between sex and love.     

Personality structure of Mexican Americans using the Comrey Personality Scales

The Comrey Personality Scales (CPS) were used to examine the personality structure of 176 Mexican American college students. A majority of the eight factors maintained substantial loadings and corresponded closely with Comrey's normative sample as well as with Brazilian and New Zealand samples. Two factors, Conformity and Orderliness, showed the weakest fit across all four groups. Overall, the CPS shows adequate measurement properties for "normal" personality assessment among Mexican Americans and is preferable to instruments such as the Minnesota Multiphasic Personality Inventory (MMPI). However, the external validity of the CPS with clinical populations must first be determined prior to its use to assess psychopathology among Mexican Americans.     

In Search of Causes of Hung Juries

A major problem facing the jury system is the hung jury. Several solutions have been proposed i.e., to minimize the decision rule, to create mixed juries, or to give the jury the 'dynamite' instructions. Nevertheless, no efforts have been made to determine the underlying causes of a hung jury. This paper presents an empirical study of hung versus unanimous juries in terms of the deliberation style and content. It suggests ways of avoiding hung juries.     

State-of-the-Art: The Structure of Argumentation

In this paper, a survey is presented of the main approaches to the structure of argumentation. The paper starts with a historical overview of the distinctions between various types of argument structure. Next, the main definitions given in the various approaches are discussed as well as the methods that are proposed to deal with doubtful cases.