Left-Right Differences on Timed Motor Examination in Children

Age-related change in the difference between left- and right-side speed on motor examination may be an important indicator of maturation. Cortical maturation and myelination of the corpus callosum are considered to be related to increased bilateral skill and speed on timed motor tasks. We compared left minus right foot, hand, and finger speed differences using the Revised Physical and Neurological Assessment for Subtle Signs (PANESS; Denckla, 1985 Denckla, M. B. 1985. Revised neurological examination for subtle signs. Psychopharmacology Bulletin, 21: 773–779. [PubMed], [Web of Science ®] , [Google Scholar]); examining 130 typically developing right-handed children (65 boys, 65 girls) ages 7–14. Timed tasks included right and left sets of 20 toe taps, 10 toe-heel alternation sequences, 20 hand pats, 10 hand pronate-supinate sets, 20 finger taps, and 5 sequences of each finger-to-thumb apposition. For each individual, six difference scores between left- and right-sided speeded performances of timed motor tasks were analyzed. Left-right differences decreased significantly with age on toe tapping, heel-toe alternations, hand pronation-supination, finger repetition, and finger sequencing. There were significant gender effects for heel-toe sequences (boys showing a greater left-right difference than girls), and a significant interaction between age and gender for hand pronation-supination, such that the magnitude of the left-right difference was similar for younger, compared with older girls, while the difference was significantly larger for younger, compared to older boys. Speed of performing right and left timed motor tasks equalizes with development; for some tasks, the equalization occurs earlier in girls than in boys.     

Sustained Attention and Unintentional Injury Among Preschool-Aged Children

This study examined vigilance in preschool-aged children and explored the relationship between vigilance and unintentional injury. There were 28 participating children, aged 4 and 5 years, who completed a computerized vigilance task for two 5-min sessions. The task generated measures of correct detections, false alarms, reaction time, and the signal detection indices of d ' and c. Primary caregivers completed daily injury phone journals for a 4-week period. Results indicated that age and signal probability affected vigilance. Older children made more correct detections, had greater perceptual sensitivity, and performed in patterns similar to adults. Performance was enhanced in the high signal probability condition. In addition, vigilance indicators of perceptual sensitivity and response bias were predictive of injury, while age was not. Specifically, children with lower perceptual sensitivity scores, and who were less responsive to the vigilance task, experienced more unintentional injures over the course of the study.     

Mathematical Knowledge for Teaching and the Mathematical Quality of Instruction: An Exploratory Study

This study illuminates claims that teachers' mathematical knowledge plays an important role in their teaching of this subject matter. In particular, we focus on teachers' mathematical knowledge for teaching (MKT), which includes both the mathematical knowledge that is common to individuals working in diverse professions and the mathematical knowledge that is specialized to teaching. We use a series of five case studies and associated quantitative data to detail how MKT is associated with the mathematical quality of instruction. Although there is a significant, strong, and positive association between levels of MKT and the mathematical quality of instruction, we also find that there are a number of important factors that mediate this relationship, either supporting or hindering teachers' use of knowledge in practice.     

Essentialism in the absence of language? Evidence from rhesus monkeys (Macaca mulatta)

We explored whether rhesus monkeys (Macaca mulatta) share one important feature of human essentialist reasoning: the capacity to track category membership across radical featural transformations. Specifically, we examined whether monkeys – like children ( Keil, 1989 ) – expect a transformed object to have the internal properties of its original category. In two experiments, monkeys watched as an experimenter visually transformed a familiar fruit (e.g. apple) into a new kind of fruit (e.g. coconut) either by placing a fruit exterior over the original, or by removing an exterior shell and revealing the inside kind of fruit. The experimenter then pretended to place an inside piece of the transformed fruit into a box which the monkey was allowed to search. Results indicated that monkeys searched the box longer when they found a piece of fruit inconsistent with the inside kind, suggesting that the monkeys expected that the inside of the transformed fruit would taste like the innermost kind they saw. These results suggest that monkeys may share at least one aspect of psychological essentialism: They maintain category‐specific expectations about an object’s internal properties even when that object’s external properties change. These results therefore suggest that some essentialist expectations may emerge in the absence of language, and thus raise the possibility that such tendencies may emerge earlier in human development than has previously been considered.     

Predictors Of Self-Reported Physical Symptoms in Low-Income, Inner-City African American Women: The Role of Optimism, Depressive Symptoms, and Chronic Illness

In this study we examined the association of optimism and depressive symptoms with self-reported physical symptoms in 241 low-income, inner-city African American women with or without a chronic illness (HIV). Although optimism was not a unique predictor of self-reported physical symptoms over and above depressive symptoms, optimism interacted with depressive symptoms and health status. In the community sample, but not the chronically ill sample, optimism buffered the association between depressive symptoms and self-reported physical symptoms. Clinical implications and directions for future research are discussed.     

"Listen and I tell you something": Storytelling and social action in the healing of the oppressed

The process of healing from life under a military dictatorship is slow and arduous. Reviving one's sense of self when the peace has been shattered; articulating vision and purpose in a culture and a community polarized and divided, requires both a connection to the spiritual and an outlet for direct action. In both cases it is necessary to reclaim ones' voice and to find others who will listen with the commitment to receive and understand. In this article, the words of citizens of Argentina and Chile are presented to illustrate the experience of those who lived in violence and how they are managing to heal.     

Pathways of Risk for Accelerated Heavy Alcohol Use Among Adolescent Children of Alcoholic Parents

The current study examined two questions. First, do internalizing symptoms and externalizing behavior each mediate the relations between parent psychopathology (alcoholism, antisocial personality disorder, and affective disorder) and growth in adolescent heavy alcohol use? Second, are there gender differences in these mediated pathways? Using latent curve analyses, we examined these questions in a high-risk sample of 439 families (53% children of alcoholic parents; 47% female). Collapsing across gender, adolescent-reported externalizing behavior mediated both the relation between parent alcoholism and growth in heavy alcohol use and the relation between parent antisociality and growth in heavy alcohol use. Parent-reported externalizing behavior only mediated the relation between parent antisociality and growth in heavy alcohol use in males. No support was found for internalizing symptoms as a mediator of these relations. Avenues are suggested for further exploring and integrating information about different mediating processes accounting for children of alcoholics' risk for heavy alcohol use.     

Status incongruity and backlash effects: Defending the gender hierarchy motivates prejudice against female leaders

Agentic female leaders risk social and economic penalties for behaving counter-stereotypically (i.e., backlash; Rudman, 1998), but what motivates prejudice against female leaders? The status incongruity hypothesis (SIH) proposes that agentic women are penalized for status violations because doing so defends the gender hierarchy. Consistent with this view, Study 1 found that women are proscribed from dominant, high status displays (which are reserved for leaders and men); Studies 2–3 revealed that prejudice against agentic female leaders was mediated by a dominance penalty; and in Study 3, participants' gender system-justifying beliefs moderated backlash effects. Study 4 found that backlash was exacerbated when perceivers were primed with a system threat. Study 5 showed that only female leaders who threatened the status quo suffered sabotage. In concert, support for the SIH suggests that backlash functions to preserve male dominance by reinforcing a double standard for power and control.     

OVERT, COVERT, AND SUBTLE SEXISM

The Attitudes Toward Women Scale (AWS) is routinely used as a general measure of sexism. In this article, it is argued that the AWS (Spence, Helmreich, & Stapp, 1973) actually measures overt or blatant sexism (harmful and unequal treatment of women that is intentional, visible, and unambiguous), whereas the Modern Sexism Scale (MS) measures covert or subtle forms of sexism (sexism that is either hidden and clandestine or unnoticed because it is built into cultural and societal norms). Support for this distinction is shown by way of (a) confirmatory factor analyses, (b) correlations with affective reactions to different categories of women and men (i.e., women and men in general, traditional women and men, feminists, and chauvinists), and (c) correlations with perceptions of sexual harassment. These analyses indicate that the AWS and MS scales measure distinct but related constructs.