Dispositional empathy in high- and low-risk parents for child physical abuse

OBJECTIVE: The present study was designed to investigate dispositional empathy in high-risk parents for child physical abuse, using self-report instruments. More specifically, the objective was to know if high-risk parents for child physical abuse, in comparison with low-risk parents, show deficits on main dimensions of dispositional empathy: empathic concern, role-taking, and personal distress. METHOD: Based on their scores on the Abuse Scale of the CAP Inventory (Milner, 1986), 36 high-risk and 38 low-risk for child physical abuse participants were selected from a total sample of 440 Basque Country (Spain) general population parents. Both groups were statistically matched on sociodemographic variables. The Interpersonal Reactivity Index (IRI, Davis, 1980), the Hogan Empathy Scale (HES, Hogan, 1969) and the Questionnaire Measure of Emotional Empathy (QMEE, Mehrabian & Epstein, 1972) were used to assess dispositional empathy. RESULTS: As expected, high-risk, relative to low-risk, parents showed lower total scores on the HES and QMEE measures and lower scores on the IRI "Empathic concern" dimension. Moreover, high-risk, relative to low-risk, parents showed higher scores on the IRI "Personal distress" dimension. No differences between groups were observed for the IRI "Perspective-taking" dimension. CONCLUSIONS: Findings of the present study supported the hypothesis that high-risk parents for child physical abuse show a deficit in dispositional empathy. High-risk parents reported less feelings of warmth, compassion and concern for others and more feelings of anxiety and discomfort that result from observing another's negative experience.     

Prediction of distance in hammer throwing

The aim of this study was to determine how much the predicted distance of a hammer throw is affected by (1) ignoring air resistance and (2) assuming that the centre of mass of the hammer coincides with the centre of the ball. Three-dimensional data from actual throws (men: 72.82 +/- 7.43 m; women: 67.78 +/- 4.02 m) were used to calculate the kinematic conditions of the hammer at release. A mathematical model of the hammer was then used to simulate the three-dimensional airborne motion of the hammer and to predict the distance of the throw. The distance predicted for vacuum conditions and using the ball centre to represent the hammer centre of mass was 4.30 +/- 2.64 m longer than the official distance of the throw for the men and 8.82 +/- 3.20 m longer for the women. Predictions using the true centre of mass of the hammer reduced the discrepancy to 2.39 +/- 2.58 m for the men and 5.28 +/- 2.88 m for the women. Predictions using air resistance and the true centre of mass of the hammer further reduced the discrepancy to -0.46 +/- 2.63 m for the men and 1.16 +/- 2.31 m for the women. Approximately half the loss of distance produced by air resistance was due to forces made on the ball and the remainder to forces made on the cable and handle. Equations were derived for calculation of the effects of air resistance and of the assumption that the centre of mass of the hammer coincides with the centre of the ball, on the distance of the throw.     

CULTURALLY SITUATED EXPLORATIONS OF CHILD DEVELOPMENT: A HOME VISIT PROJECT FOR PROSPECTIVE EARL Y CHILDHOOD TEACHERS

As part of a child development course in an undergradute early childhood teacher preparation program, students completed a home visit project with a family of a culture other than their own. This report examines the assignment's effectiveness in helping students become aware of the cultural nature of human development and the role of the family in the child's growth and development. Student responses obtained through focus groups, papers, field notes, and course evaluations included 1) reflections on the nature of the experience; 2) reactions to the role of researcher in the home of relative strangers and 3) evaluation of the learning. Although students seem to have achieved some understanding of the role of family and culture, the further step of recognizing culture as fundamental to development was generally not an outcome of the present intervention.     

Principles and Boundaries of Fact-checking: Journalists’ Perceptions

This study examines journalists’ perceptions of fact-checking, a growing journalistic activity focused on assessing the veracity of public claims. Professional journalists working on fact-checking or interested in doing fact-checking and based in the United States were surveyed regarding the purpose of this activity; principles of fact-checking, including boundaries with activism or partisanship; and statements concerning which political party politicians are more likely to produce false claims. This study shows a high level of agreement between respondents on normative aspects of fact-checking. Journalists stated that there should be clear boundaries between fact-checking and activism and that fact-checking should be non-partisan. At the same time, participants showed discrepancies on topics like the use of the word “lie” when finding that a claim is false. In addition, among respondents, the perception that Republicans are more likely to make false claims was significantly higher than the perception that Democrats are more prone to produce false claims, although the difference was moderate, with considerable percentages of respondents answering that they neither agree nor disagree with the statements that Republicans, or Democrats, are more prone to make false claims.     

Super twisting control of a parametrically excited overhead crane

The principal contribution of this note is to avoid the parametric resonance effect and attenuate the payload oscillations in an overhead-crane system subject to periodic variations in the base support. Considering an appropriate sliding output with relative degree one, we present the sliding mode control design based on the Super-Twisting Algorithm (STA), ensuring finite time convergence to the desired sliding surface for the linear periodic system with Lipschitz continuous matched and unmatched uncertainties bounded together by their gradients by known functions. The suggested approach also provides chattering phenomenon attenuation. Obtained results are verified experimentally.     

The effect of playing tactics and situational variables on achieving score-box possessions in a professional soccer team

Abstract

The aim of this study was to analyse the influence of playing tactics, opponent interaction and situational variables on achieving score-box possessions in professional soccer. The sample was constituted by 908 possessions obtained by a team from the Spanish soccer league in 12 matches played during the 2009–2010 season. Multidimensional qualitative data obtained from 12 ordered categorical variables were used. Sampled matches were registered by the AMISCO PRO^® system. Data were analysed using chi-square analysis and multiple logistic regression analysis. Of 908 possessions, 303 (33.4%) produced score-box possessions, 477 (52.5%) achieved progression and 128 (14.1%) failed to reach any sort of progression. Multiple logistic regression showed that, for the main variable “team possession type”, direct attacks and counterattacks were three times more effective than elaborate attacks for producing a score-box possession (P < 0.05). Team possession originating from the middle zones and playing against less than six defending players (P < 0.001) registered a higher success than those started in the defensive zone with a balanced defence. When the team was drawing or winning, the probability of reaching the score-box decreased by 43 and 53 percent, respectively, compared with the losing situation (P < 0.05). Accounting for opponent interactions and situational variables is critical to evaluate the effectiveness of offensive playing tactics on producing score-box possessions.