Gaze behaviors and decision making accuracy of higher- and lower-level ice hockey referees

BackgroundGaze behaviors are often studied in athletes, but infrequently for sport officials. There is a need to better understand gaze behavior in refereeing in order to improve training and education related to visual search patterns, which have been argued to be related to decision making (Abernethy & Russell, 1987a).ObjectiveTo examine gaze behaviors, decision accuracy, and decision sensitivity (using signal detection analysis) of ice hockey referees of varying skill levels in a laboratory setting.DesignUsing an experimental design, we conducted multiple t-tests.MethodHigher-level (N = 15) and lower-level ice hockey referees (N = 15) wore a head-mounted eye movement recorder and made penalty/no penalty decisions related to ice hockey video clips on a computer screen. We recorded gaze behaviors, decision accuracy, and decision sensitivity for each participant.ResultsResults of the t-tests indicated no group differences in gaze behaviors; however, higher-level referees made significantly more accurate decisions (both accuracy and sensitivity) than lower-level referees.ConclusionHigher-level ice hockey referees are superior to lower-level referees on decision making, but referees do not differ on gaze behaviors. Possibly, higher-level referees process relevant decision making information more effectively.     

On Latent Growth Models for Composites and Their Constituents

Over the last decade and a half, latent growth modeling has become an extremely popular and versatile technique for evaluating longitudinal change and its determinants. Most common among the models applied are those for a single measured variable over time. This model has been extended in a variety of ways, most relevant for the current work being the multidomain and the second-order latent growth models. Whereas the former allows for growth function characteristics to be modeled for multiple outcomes simultaneously, with the degree of growth characteristics' relations assessed within the model (e.g., cross-domain slope factor correlations), the latter models growth in latent outcomes, each of which has effect indicators repeated over time. But what if one has an outcome that is believed to be formative relative to its indicator variables rather than latent? In this case, where the outcome is a composite of multiple constituents, modeling change over time is less straightforward. This article provides analytical and applied details for simultaneously modeling growth in composites and their constituent elements, including a real data example using a general computer self-efficacy questionnaire.     

Body Temperature Influence on Time Perception

The chemical clock hypothesis implies a causal link between body temperature and the perception of duration. A strict interpretation of this construct requires a common slope value in an Arrhenius plot that relates time to temperature for every individual tested. Previous studies testing this proposition have confirmed a general relationship for data summed across multiple subjects. However, the same studies raise doubts as to whether this relationship holds for each and every individual tested. Unfortunately, these investigations have been limited by methodological constraints, thus, one could argue that the strong isomorphism intrinsic to the chemical clock hypothesis has yet to be fairly tested. In the present experiment, I sought to distinguish the effects of selective head temperature changes on the estimation of duration. Nonlinear decreases in estimated duration were observed with ascending deep auditory canal temperature. These findings support the contention of a thermally stable region of temporal perception bounded by conditions in which temporal estimates directly depend on body temperature. In contradicting physiological adequacy as an explanatory construct, the present results suggest a direct relationship between time perception and the homeothermic platform. I compare these results with earlier findings concerning the chemical clock concept and examine respective discrepancies as a basis for a fuller understanding of a temporal phenomenon that is frequently referred to as me internal clock.     

Memory,Rite, and Tradition： A Comparative Confucian-Christian Literary Analysis

I The Confucian Classics and Christian Scriptures speak often about the role ＂the past＂ plays in shaping individual and communal character, life, perception, morality and purpose. In both Christianity and classical Confucianism, memory, rite and tradition are each accorded a central place in preserving and interpreting the past as a dynamic force in the present. The first part of this paper studies points of thematic similarity in Christian and Confucian interpretation of memory, rite and tradition. In the second part of the paper, however, critical points of divergence are addressed; for behind the formal similarities lie deeper intellectual, relational and moral differences in understanding the nature and function of ＂the past＂ in determining both the present and the future. Comparative literary analysis provides a rich resource for contemporary application of the Confucian Classics and Christian Scriptures to discussion of cultural memory and global harmony. The comparative reading of ＇texts＇ also provides an important point of access for understanding the role literature itself plays in determining the form, content and power of memory, ritual and tradition in both Confucianism and Christianity.     

The alchemy of facilitation revealed through individual stories and collective narrative

Facilitation is a key ‘ingredient’ in the success and sustainability of communities of practice. Yet, little attention has been given to in situ experiences of facilitators of these communities. This paper takes up the challenge to explore these experiences using reflective stories written by seven TATAL (Talking about Teaching and Learning) facilitators (the authors) from different disciplines in five different Australian universities. The authors’ collaborative analysis of their experiences suggests reframing the role of facilitator to include the role of alchemist, a promoter of transformation. This reframing has the potential to change the way higher education community of practice facilitators think about and enact their role. The story-based reflective process used in this self-study could also be used by facilitators to investigate their own practice, as a component of facilitator education programmes or by academics and researchers in other contexts who seek a participatory, collaborative approach to evaluate their practice.     

Worry in imagery and verbal form: effect on residual working memory capacity

Worry-prone individuals have less residual working memory capacity during worry compared to low-worriers (Hayes, Hirsch, & Mathews, 2008). People typically worry in verbal form, and the present study investigated whether verbal worry depletes working memory capacity more than worry in imagery-based form. High and low-worriers performed a working memory task, random interval generation, whilst thinking about a worry in verbal or imagery form. High (but not low) worriers had less available working memory capacity when worrying in verbal compared to imagery-based form. The findings could not be accounted for by general attentional control, amount of negatively-valenced thought, or appraisals participants made about worry topics. The findings indicate that the verbal nature of worry is implicated in the depletion of working memory resources during worry among high-worriers, and point to the potential value of imagery-based techniques in cognitive-behavioural treatments for problematic worry.     

Examination of a Measure of Racial Discrimination Among African American Adolescents1

The present study consisted of an empirical examination of the psychometric properties of the Index of Race‐Related Stress (IRRS) among 258 African American adolescents. Confirmatory factor analyses supported a 3‐component model (i.e., individual, collective/institutional, and cultural) of racial discrimination perceived by African American adolescents. The revised subscales of the IRRS were associated with another measure of racial discrimination as evidence of concurrent validity, and the subscales of the IRRS demonstrated adequate reliability. The results are consistent with previous research indicating that adolescent responses to perceived racial discrimination are distinct from adults'. Future research should consider the assessment of racial discrimination among African American adolescents to understand the relationship between perceptions of racial discrimination and indexes of mental and physical health.     

Alcohol-Induced Amnesia and Personalized Drinking Feedback: Blackouts Predict Intervention Response

Alcohol-induced amnesia (“blackout”) is a reliable predictor of alcohol-related harm. Given its association with other negative consequences, experience of alcohol-induced amnesia may serve as a teachable moment, after which individuals are more likely to respond to intervention. To test this hypothesis, alcohol-induced amnesia was evaluated as a moderator of brief intervention effect on (a) alcohol-related consequences and (b) the proposed intervention mediators, protective behavioral strategies and peak blood alcohol concentration (BAC). Baseline alcohol risk measured using the Alcohol Use Disorders Identification Test (AUDIT) was also evaluated as a moderator to rule out the possibility that amnesia is simply an indicator of more general alcohol risk. College students (N = 198) reporting alcohol use in a typical week completed assessments at baseline and 1-month follow-up as part of a larger intervention trial. Participants were randomized to assessment only (AO; n = 58) or personalized feedback intervention (PFI; n = 140). Hierarchical regression was used to examine direct and indirect intervention effects. A significant group-by-amnesia interaction revealed that only PFI participants who had experienced alcohol-induced amnesia in the past month reported decreases in alcohol consequences at 1-month follow-up. The PFI reduced alcohol-related consequences indirectly through changes in peak BAC, but only among those who had experienced amnesia at baseline. In contrast, baseline alcohol risk (AUDIT) did not moderate intervention effects, and use of protective behavioral strategies did not statistically mediate intervention effects. Findings suggest that loss of memory for drinking events is a unique determinant of young adult response to brief alcohol intervention. Normative feedback interventions may be particularly effective for individuals who have experienced alcohol-induced amnesia in the past 30 days.