How Children Determine the Size of 3D Structures: Investigating Factors Influencing Strategy Choice

This study explores changes in students’ strategies as they solve different types of volume problems. Fifth graders were presented with pictures showing 3D objects and a unit cube; they determined how many cubes made up the object and explained their responses. We examined whether children transferred strategies across problem types, varying in terms of (a) availability of grids that divided objects into individual unit cubes, (b) order of items, (c) object shape, and (d) availability of the unit cube. Children's strategy choices varied systematically with object and task characteristics. They were more likely to use conceptually appropriate strategies when presented with grids. With non-gridded objects, they were more likely to treat a 3D object as a collection of 2D faces. Presenting gridded items first increased the use of conceptually appropriate strategies on the non-gridded items. We discuss findings in the context of Siegler's theory of strategy choice and address educational implications.     

Structural-functional correlations between hippocampal volume and cortico-limbic emotional responses in depressed children

Although hippocampal atrophy and altered functional brain responses to emotional stimuli have been found in major depressive disorder (MDD), the relationship between the two is not yet well understood. The present study focused on children with and without a history of preschool onset MDD (PO-MDD) and directly examined the relations between hippocampal volume and functional brain activation to affect-eliciting stimuli. Children completed annual diagnostic assessments starting at preschool. When children were school-aged, high-resolution structural MRI and task-related functional MRI data were acquired from N = 64 nonmedicated children. During fMRI, subjects were shown emotional faces. Results from the total sample indicated that smaller bilateral hippocampal volumes were associated with greater cortico-limbic (e.g., amygdala, hippocampus, dorsolateral prefrontal cortex) activation to sad or negative faces versus neutral faces. Left hippocampal volume was negatively associated with the cortico-limbic activation in both the PO-MDD and healthy children. Right hippocampal volume was negatively correlated with amygdala responses in the PO-MDD group, but not in the healthy comparison group. These findings suggest that there may be important interrelationships between reduced hippocampal volume and hyperactivation of brain responses in children, both those with and those without a history of PO-MDD.     

Individual Differences in Various Parameters of Motor Learning

60 Ss practiced 6 days on the stabilometer. No reminiscence or warm-up decrement was found; loss of skill occurred from 1-day layoffs which lessened as learning progressed. A 3-component exponential equation fitted the learning trend (including relearning). Both individual differences and intra-individual variations decreased exponentially with practice, but the ratio of individual differences to mean score increased. Practice had little influence on adjacent trial rs. Between scores in any particular pair of separated trials, r decreased when increasing number of trials separated them. Averaging 8 initial and 8 final trials gave optimum learning score reliability (r = .95). Individual rates of learning were not appreciably correlated with amounts of learning (r = .23). Final performance levels could only be predicted 50% from initial skill and cumulated amounts of learning unless more than half of the total practice (i.e., more than 90% of the potential learning) had been accomplished. The pattern of zero order rs between amount of learning and initial and final skill levels differed markedly from that previously observed in learning the ladder climb.     

Dyadic Versus Individual Storytelling by Preschool Children

A constructive model of recall and communication (D. Edwards & D. Middleton, 1986) and certain whole-word approaches to learning (C. Pontecorvo & C. Zucchermaglio, 1989) were evaluated in conjunction with an investigation of the benefits of joint storytelling on children's cognitive processes. Preschoolers (N = 36, aged 30-62 months) were prompted to compose a story, working with a classmate (during which they talked together freely and generated a mutual narrative) or individually. Findings revealed that, although dyadically generated stones were longer, containing significantly more words, propositions, and additive conjunctions, stories told by individuals contained proportionally more logically connected statements and greater use of the past tense. Moreover, compared with dyadic stories, individually generated narratives contained fewer alterations of the protagonist.     

The Higher Structural Phases of Concept Formation of Children

By means of a 2 × 2 × 4 way analysis of variance, modified when needed, the self-disclosing ability (as measured by the Jourard Self-Disclosure Questionnaire) of freshman college students from divorce and nondivorce homes was analyzed. The results of the study provide evidence that, generally, a person from a female-based home of the divorce type does not disclose the self any more or any less than a person from a nondivorce home situation. Also, the father does not play a major role in determining or directing the self-disclosure process of his children.     

Positive Organizational Outcomes Associated with a Penchant for Openness

The tension between scientific openness versus secrecy has existed for centuries (Hull 1985). However, both academics and practitioners have recently argued that openness by private firms has many positive attributes. The purpose of this research effort is to review the extant literature on openness and to develop hypotheses regarding its impact on organizational outcomes. We then use a unique database to test the idea with 87 companies. Our findings are that openness is beneficial to the firm from a science, technological, and financial perspective and, perhaps, to the employees from an ethical viewpoint. The managerial and societal implications are also discussed.     

The Intermingling of Social and Evolutionary Psychology Influences on Hair Color Preferences

Hypotheses were tested as explanations for why men and women have specific hair color preferences for mates. Traditional evolutionary psychology approaches suggest that men should prefer light hair on women because it signals youth and health, while women should desire dark hair on men because it signals maturity and stability. Repeated exposure predicts people prefer the hair color on mates they are exposed to most frequently. Uniqueness implies that men and women should desire the least prevalent hair colors on potential mates because of its scarcity and rarity. Findings primarily support traditional evolutionary psychology predictions and occasionally the repeated exposure hypothesis, but not uniqueness predictions. Sex and regional differences indicate that social and evolutionary processes combine to influence hair color preferences.     

Thomas J. Sweeney: A Visionary Leader and Advocate for the Counseling Profession

The contributions of Thomas J. Sweeney to the counseling profession through professional leadership and advocacy, scholarship, teaching, and the development of Chi Sigma Iota are chronicled through a personal interview and comments from professional colleagues. Readers are provided with a sense of the depth and breadth of his more than 50 years of dedicated service.