Effects of iron deficiency in infancy on patterns of motor development over time

This longitudinal study of the effects of iron deficiency in infancy assessed motor development over time in 185 healthy Costa Rican children who varied in iron status at 12-23 months. Longitudinal analyses (hierarchical linear modeling) used the Bayley Psychomotor Index before and both 1 week and 3 months after iron treatment in infancy and the Bruninks-Oseretsky Test of Motor Proficiency - long form at 5 years and short form at 11-14 years. Children with chronic severe iron deficiency in infancy had lower motor scores at the beginning of the study and a lower but parallel trajectory for motor scores through early adolescence. Thus, there was no evidence of catch-up in motor development, despite iron therapy in infancy that corrected iron deficiency anemia in all cases.     

Using Structural Equation Modeling and Multidimensional Scaling to Assess Female College Students’ Academic Adjustment as a Function of Perceived Parenting Styles

One understudied aspect of first-year students' transition to college is their relationship with their parents. This study investigated the relationship between three parenting styles (authoritarian, permissive, and authoritative) and adjustment to college life of Palestinian-Arab young females. The aims of the study were to measure Palestinian-Arab females' perceptions of their parents' parenting styles and the set of connections between these perceptions and adjustment to college constructs. This study used repeated measures analysis, structural equation modeling (SEM) and smallest space analysis (SSA, a variant of multidimensional scaling MDS) statistical methods to compute the complex relationships indicated in previous research between the examined variables. Repeated measures analysis results showed that the participants perceived their parents as more authoritative than permissive or authoritarian. With regard to the authoritative parenting, the path model and the SSA solution indicated different results. Only the SSA has confirmed the postulated connection between authoritative parenting style and academic adjustment, for both parental structures. Both statistical methods showed a positive connection between the authoritarian parenting style and academic maladjustment. Permissive parenting style was not found to be related to positive or negative adjustment to college. Interpretation of these results, their congruence within the context of the theoretical frameworks and practical implications are discussed.     

The conflicting choices of alternating selves

Participants made choices after the salience of their social identities was manipulated. Choices assimilated to the salient identity, whether that identity stemmed from a person’s role (e.g., student, family member) or culture (e.g., Chinese, American). Thus, the preferences that participants expressed depended on the identity that happened to be salient at the moment of choice, with participants expressing preferences when one identity was salient that conflicted with the preferences they would express were another identity salient. These effects only arose for those who held and identified with the evoked identity. Studies further revealed that such identity-congruent choices influence post-choice satisfaction and regret: participants were less satisfied with their prior choices when the identity salient during post-choice evaluation or consumption was different from the identity salient during choice, compared to when the “choosing” and “consuming” identities were the same. Implications of the findings are discussed.     

Improving performance and increasing the use of non-positive testing in a rule-discovery task

A well-documented characteristic of rule discovery behaviour is subjects' infrequent use of negative testing. Previous attempts at increasing the use of negative testing have met with little success. In an evaluation task, we found that subjects appreciate the benefits of negative testing and disconfirmation (Kareev & Halberstadt, this issue). Further, when given the choice, subjects prefer to begin their inquiry by employing a reception mode of inquiry, and only later switch to a generative strategy (Halberstadt & Kareev, 1992). In the present study we had subjects solve two rule-discovery problems. For the training problem, 180 subjects were assigned either to the traditional generation mode, in which subjects had to generate number triplets, or to a reception mode, in which subjects were presented with number triplets by the experimenter. For the subsequent test problem both groups used the traditional generation mode. Results revealed that subjects trained by the reception mode were more likely to use non-positive tests and more likely to solve the second problem. Apparently, training under the less demanding reception mode enabled subjects to realize the potential relevance of nonpositive testing.