Technologically mediated complex problem‐solving on a statistics task

Simulations on computers can allow many experiments to be conducted quickly to help students develop an understanding of statistical topics. We used a simulation of a challenging problem in statistics as the focus of an exploration of situations where members of a problem‐solving group are physically separated then reconnected via combinations of computer and communications technology to work collaboratively on the simulation. The particular focus in this work was on trying to understand how students could use a system which allowed them to conduct variable based practical experiments in order to help them develop their knowledge and understanding of a statistics topic. We wished to develop an understanding of the virtual space created by shared simulations and video communication tools for supporting collaborative work between people at a distance. The paper reports on an experiment involving 48 subjects using this virtual space to establish the impact on their statistics understanding and to map their use of this distributed environment for learning. It establishes that the virtual space is effective for learning, and that the video conferencing condition which allows for eye contact between the pairs has some advantages for successful problem‐solving with the simulation. In addition the experimental setting provided some opportunities for exploring subjects' understanding of statistical and experimental concepts.     

Polyvictimization,Psychological Distress,and Trauma Symptoms in College Men and Women

This study examined the relationship between polyvictimization, psychological distress, and trauma symptoms in college men and women. Childhood victimization was common among participants. Regression analyses revealed that polyvictimization (i.e., high cumulative levels of victimization) is a better predictor of psychological distress and trauma symptoms than is any individual category of victimization (i.e., sexual, physical, peer/sibling, child maltreatment, witnessing/indirect, or property crime). Gender did not moderate the relation between victimization and distress and trauma symptoms. Implications for counselors are discussed.     

Negative caregiver strategies and psychopathology in urban,African-American young adults

OBJECTIVE: There were three aims: (1). assess the prevalence of reported exposure to negative caregiver strategies in a community-based African-American population, (2). examine the sources of variation in caregiver parenting strategies, including demographic variables and child characteristics, (3). investigate whether mental disorders in young adulthood may differ based on reported degree of exposure to negative strategies. METHOD: The participants were 1197 African-Americans involved in a 1999-2001 young adult follow-up (age M=19.6, SD=.6) of an evaluation of school-based interventions in the Baltimore, MD metropolitan area. Measures included teacher-report of child aggression in first grade, parent-report of demographic variables in first and sixth grade, and young adult self-report of symptomatology, suicidal behaviors, and childhood caregiver discipline strategies. RESULTS: Fifty-four percent of the sample reported some use of physical discipline by caregivers. Lower family income and younger caregiver age, as well as teacher reports of child aggression, were related to reports of caregiver's high use of negative strategies. In addition, young adults who reported a high rate of negative caregiver strategies had a significantly increased risk for psychopathology and were over twice as likely to have experienced a history of suicidal ideation than those reporting low exposure.CONCLUSIONS: The results demonstrate the importance of examining variation in this population, with the poorest and the youngest using negative parenting strategies more frequently. In addition, the present study replicated previous findings of the link between negative caregiver discipline strategies and psychopathology. This association appears robust across diverse populations. The implications for preventive interventions are discussed.     

Child sexual abuse: factors affecting victims' removal from home

This study was conducted to examine factors associated with children's protective service workers' decision to remove sexually abused children from the family home. The decision to remove was analyzed relative to the following six factors: (1) nature of the abuse, (2) severity of abuse, (3) frequency of abuse (4) mothers' employment status, (5) mothers' compliance with a recommended treatment plan, and (6) mothers' belief of the victim. Discriminant function analysis revealed that the discriminant function containing mothers' compliance, mothers' belief, severity of abuse, mothers' employment status, and frequency of abuse, in order of importance of contribution, was significantly related to victims' removal from the home.     

The effects of compound stimulus preexposure of two elements differing in salience on the acquisition of conditioned suppression

Conditioned attention theory (CAT) of latent inhibition (LI) states that parallel learning processes occur during reinforced and nonreinforced stimulus presentation. The present experiments investigated the effects of nonreinforced preexposure of either a compound CS or elements of that compound which differed in salience. Three predictions were advanced: (1) Both the compound and its elements will show an increase in LI as a function of the number of preexposures; (2) the two elements will show different levels of LI, with more LI accruing to the more salient element; (3) overshadowing will occur during compound preexposure. Two experiments, using rats as subjects and a conditioned suppression test, are reported. In Experiment 1, groups received 0, 20, 40, or 80 nonreinforced preexposures to a compound whose elements differed in salience. The results of the subsequent test confirmed predictions 1 and 2. Experiment 2, in which groups were preexposed to either the elements or the compound, provided evidence for an overshadowing effect, confirming prediction 3 from CAT.     

全球化对职业技术教育的挑战及对策

当前,经济、政治、教育等社会诸领域的全球化已成为不可回避的大趋势。对社会进步及个体生存、发展而言,全球化的发展利弊同存,而通过加强职业技术教育有助于抓住机遇并减少其负面影响。本文阐述了由全球化在职业技术教育领域引起的新变化,并针对如何应对全球化带来的新挑战提出一些建议。     

Editorial

The aim of this paper is to reflect upon the ways in which 'sex', as an unchanging biological given, is often implicitly taken for granted in tertiary sex education. The paper details my own attempt to move beyond what I have come to experience as the predictable order of teaching students about sex and sexuality: the exploration of sexuality and gender anchored by the unquestioned assumption of biological sexual difference. I provide a practical example of introducing new material ism in science, and social science critiques of sex, into a tertiary level course. Consideration is given to the importance of fostering critical thinking in education: principally in being open-minded to evidence that challenges one's own belief system.