高校体育教育场域中的性别透视现象思考

运用文献资料法分析高校体育教育中男女大学生以及体育教师的体育行为和意识表现,得出高校体育教育场域中存在:体育教学中的性别屏蔽现象、体育师资结构上的性别隔离现象、体育运动项目选择上的性别分化现象、体育课堂教学过程中的性别刻板现象以及课外体育参与中的性别偏失现象等结论。运用社会性别理论加以分析,指出追求教育平等的高校体育教育过程中自觉或是不自觉地成为对性别刻板印象的认同和性别行为的强化等强有力手段,也是直接导致男女大学生在高校体育教育结果上的性别不平等。     

Reproducibility of an isokinetic eccentric muscle endurance task

Abstract

Despite the widespread use of isokinetic eccentric muscle endurance protocols, no research has examined the absolute and relative reliability of such tests. The aim of this study was to examine the reliability of an isokinetic eccentric knee muscle endurance task. Fifteen healthy untrained males volunteered to take part in the study and written informed consent was obtained. The procedures received approval from the University Research Ethics Committee. Participants visited the laboratory on three separate occasions: 2 weeks before testing to familiarize them with the experimental procedures, and on two separate occasions, 2 weeks apart and at the same time of day. Isokinetic eccentric knee extension and flexion movements of the dominant limb were performed using a calibrated dynamometer (Biodex System 3). Range of motion during testing was set using voluntary maximal full extension (0 rad) to 1.57 rad of knee flexion and testing was conducted at 1.56 rad · s^?1. Participants performed four maximal efforts to determine maximal peak torque. After 2 min rest, participants completed the all-out endurance test of 50 continuous eccentric repetitions. Data were gravity corrected and windowed to only include constant velocity periods. Repeated-measures analyses of variance were used to examine differences in maximal peak extension and flexion torque and the maximal torque measurement recorded during the endurance test. Absolute and relative reliability of the torque fatigue index, work fatigue index, and total work were assessed through calculation of intra-class correlation coefficients, coefficients of variation, and absolute 95% limits of agreement using the methods described by Bland and Altman (1986). Differences between the strength test and the endurance trial for peak torque were found to be non-significant for both quadriceps (323 vs. 323 N · m) and hamstrings (183 vs. 178 N · m). The intra-class correlation coefficients revealed significant (P<0.05) positive moderate to strong correlations (r=0.44–0.94) across repeated trials for all parameters except hamstring torque fatigue (P=0.11) and hamstring work fatigue index (P=0.08). Coefficients of variation ranged from 6% to 48% and were large for the work fatigue index and torque fatigue index but acceptable for total work for both the extensors and flexors. The 95% limits of agreement indicated systematic bias in repeated trials for both the work fatigue index and torque fatigue index for extensors and flexors, ranging from ?3% to ?10%, with less fatigue evident in the second test. There was also systematic bias for total work, with more work being performed during the second than the first test for both extensors and flexors. The random error was large for all variables and there was greater random error in the hamstrings compared with the quadriceps. Together with moderate to strong intra-class correlation coefficients and large coefficients of variation, the data suggest that there is small systematic bias in repeated eccentric muscle actions for both the quadriceps and hamstrings, although the random error was large despite habituation procedures. Therefore, data from an isokinetic eccentric muscle endurance task should be viewed with some caution even when participants receive considerable habituation before assessment.     

Sex Bias and the Validity of Believed Differences between Male and Female Interscholastic Athletic Coaches

Abstract

Previous research indicates that young athletes as well as athletic administrators hold gender-role stereotypical beliefs about coaches that disfavor females. The validity of two such beliefs (lack of qualified female coaches and time constraints due to family responsibilities) was examined in a statewide survey of 256 female and 296 male interscholastic coaches and a nationwide survey of 2,719 male and 1,449 female interscholastic coaches. Statistical analyses (p < .001) indicated that female coaches were (a) more qualified than their male counterparts with respect to coaching experience with female teams, professional training, and professional experience; (b) as qualified as male coaches with regard to intercollegiate playing experience; and (c) less qualified than male coaches with respect to high school playing experience and coaching experience with male teams. Findings also indicated that male rather than female coaches more often experienced time constraints due to family responsibilities.     

Effects of leg dominance on performance of ballet turns (pirouettes) by experienced and novice dancers

Turns (pirouettes) are an important movement in ballet and may be affected by “lateral bias”. This study investigated physiological differences exhibited by experienced and novice dancers, respectively, when performing pirouette with dominant and non-dominant leg supports, respectively. Thirteen novice and 13 experienced dancers performed turns on dominant or non-dominant legs. The maximum ankle plantarflexion, knee extension and hip extension were measured during the single-leg support phase. The inclination angle of rotation axis is the angle between instantaneous rotation axis and global vertical axis in the early single-leg support phase. Both groups exhibited a greater hip extension, knee extension, and ankle plantarflexion when performing a turn on the non-dominant leg. For experienced dancers, the inclination angle of rotation axis during the pre-swing phase was generally smaller for dominant leg support than non-dominant leg. However, no significant difference was found in inclination angle of rotation axis of novice dancers. For experienced dancers, an improved performance is obtained when using the dominant leg for support. By contrast, for novice dancers, the performance is independent of choice of support leg. The significant lateral bias in experienced dancers indicates the possible influence of training. That is, repetitive rehearsal on the preferred leg strengthens the impact of side dominance in experienced dancers.     

Effects of Method of Subject Selection (Volunteer vs Random) and Treatment Variable on Motor Performance

Abstract

The purpose of this study was to test for possible interaction effects between method of subject selection (volunteer vs random) and a selected treatment variable—verbal encouragement. The presence of such an interaction would suggest that generalizations regarding verbal encouragement could be made only to specific subject populations. Volunteer (n = 40) and randomly selected (n = 40) subjects were randomly assigned to either a verbal encouragement condition or to a control group with no verbal encouragement. Dependent variables were a tapping task and a leg lift task. It was predicted that volunteer subjects, due to their higher need for approval and greater desire to accommodate, would perform significantly better under the verbal encouragement condition than would the randomly selected subjects. Multivariate and univariate data analyses indicated that the prediction was supported on the tapping task (female subjects only) but not on the leg lift task. It was concluded, at least on certain tasks, that use of volunteer subjects may result in a selection bias × treatment interaction effect that could limit the generalizability of research results.     

J函数的边际修正估计及比较

J函数是1-G(t)和1-F(t)的比值.文章把关于G(t)和F(t)的估计扩展到J(t)并对其进行了比较研究,包括偏差、样本方差和最大偏离的比较.     

Threats to student evaluative judgement and their management

ABSTRACT

Students’ capacity for making evaluative judgements of their own work is widely acknowledged as central to their learning within programmes as well as being vital to their subsequent professional practice. In higher education literature, the act of evaluative judgement is usually portrayed as a process of deliberative, analytical reasoning requiring student agency and objectivity, typically scaffolded by points of reference such as explicit criteria, rubrics or exemplars. This article challenges this common portrayal of judgement by drawing attention to research from outside higher education on the role of unconscious factors in judgement and decision-making. Drawing from the field of heuristics and bias studies, the article outlines six unconscious factors that have the potential to distort students’ analytical judgement of their work. A recent challenge to the heuristics and bias approach that radically repositions the place of reasoning in judgement is also considered. Since these unconscious factors have received scant attention in higher education literature, the purpose of this article is to draw attention to them, to identify the challenges they pose to current understandings of evaluative judgement, and to outline their implications for enhancing assessment practice.     

“Pick and choose” opinion climate: How browsing of political messages shapes public opinion perceptions and attitudes

ABSTRACT

High-choice media environments allow people to cocoon themselves with like-minded messages (confirmation bias), which could shape both individual attitudes and perceived prevalence of opinions. This study builds on motivated cognition and spiral of silence theory to disentangle how browsing political messages (both selective exposure as viewing full articles and incidental exposure as encountering leads only) shapes perceived public opinion and subsequently attitudes. Participants (N?=?115) browsed online articles on controversial topics; related attitudes and public opinion perceptions were captured before and after. Multi-level modeling demonstrated a confirmation bias. Both selective and incidental exposure affected attitudes per message stance, with stronger impacts for selective exposure. Opinion climate perceptions mediated selective exposure impacts on attitudes.     

“Aliens” vs. Catalogers: Bias in the Library of Congress Subject Heading

Abstract

Aliens: It is the subject of conspiracy theories and nightmares, the name of a blockbuster science fiction/horror movie franchise, and also how the de facto national library of the United States refers to “persons who are not citizens of the country in which they reside.” In 2016, the Library of Congress announced that it would reconsider the usage of “Aliens” and its related terms in the Library of Congress Subject Headings, following a student-led movement to change the pejorative term “Illegal Aliens.” Yet, three years on, these terms remain in the LCSH. Using the “Illegal Aliens” controversy as a case study, this article explores how the LCSH works, its role in research, and its vulnerabilities to bias, and offers proposals for how librarians can help improve the situation.     

Stigma activation through dis-identification: cognitive bias triggered by mass media photos of people with obesity

ABSTRACT

This study investigated how the prevalent visual depiction of obesity in the media promotes stigmatization of obese individuals. Particularly, this study proposed and tested the two sequential mechanisms which were not explicated in the previous models but indispensable in stigma research: (1) the disease avoidance response (i.e. discomfort for physical contact) and (2) dehumanizing perception. Results of two experiments overall supported the extended model: the headless photos of obese individuals triggered the disease avoidance responses, which sequentially increased the dehumanizing perception of and negative attitudes toward obese individuals. The identity trait (e.g. gender) match increased readers' level of social identification with obese people and alleviated the disease avoidance response when they saw the photo of the obese model as a whole being. By contrast, the opposite effects (i.e. disidentification and heightened discomfort) were found when the participants saw the headless photo of the obese model of the same gender.