Instrument-based biomechanical movement analysis is an effective injury screening method but relies on expensive equipment and time-consuming analysis. Screening methods that rely on visual inspection and perceptual skill for prognosticating injury risk provide an alternative approach that can significantly reduce cost and time. However, substantial individual differences exist in skill when estimating injury risk performance via observation. The underlying perceptual-cognitive mechanisms of injury risk identification were explored to better understand the nature of this skill and provide a foundation for improving performance. Quantitative structural and process modeling of risk estimation indicated that superior performance was largely mediated by specific strategies and skills (e.g., irrelevant information reduction), and independent of domain-general cognitive abilities (e.g., mental rotation, general decision skill). These cognitive models suggest that injury prediction expertise (i.e., ACL-IQ) is a trainable skill, and provide a foundation for future research and applications in training, decision support, and ultimately clinical screening investigations.
Erich J. Petushek, Edward T. Cokely, Paul Ward and Gregory D. Myer
Vanda Correia, Duarte Araújo, Alan Cummins and Cathy M. Craig
This study used a virtual, simulated 3 vs. 3 rugby task to investigate whether gaps opening in particular running channels promote different actions by the ball carrier player and whether an effect of rugby expertise is verified. We manipulated emergent gaps in three different locations: Gap 1 in the participant’s own running channel, Gap 2 in the first receiver’s running channel, and Gap 3 in the second receiver’s running channel. Recreational, intermediate, professional, and nonrugby players performed the task. They could (i) run with the ball, (ii) make a short pass, or (iii) make a long pass. All actions were digitally recorded. Results revealed that the emergence of gaps in the defensive line with respect to the participant’s own position significantly influenced action selection. Namely, “run” was most often the action performed in Gap 1, “short pass” in Gap 2, and “long pass” in Gap 3 trials. Furthermore, a strong positive relationship between expertise and task achievement was found.
Paul G. Schempp, Dean Manross, Steven K.S. Tan and Matthew D. Fincher
The purpose of the study was to ascertain the influence of subject matter expertise on teachers’ pedagogical content knowledge. Data were collected through multiple, extended interviews with 10 teachers with expertise in at least 1 subject area in physical education. Each teacher was interviewed 4 times for approximately 1 hour, focusing on the teacher’s familiarity with 2 content areas (1 expert and 1 nonexpert) and their experiences teaching the subjects. Data were analyzed using the constant comparative technique. The findings were presented with reference to Grossman’s (1990) definition of pedagogical content knowledge. Subject experts identified their largest pedagogical problem as student motivation, while nonexperts believed finding appropriate activities was their greatest challenge. Subject experts were more comfortable and enthusiastic about pedagogical duties and could accommodate a greater range of abilities. The experts and nonexperts revealed no differences in curricular selection, perceptions of students’ understanding of the subject, or evaluation criteria.
Derek T.Y. Mann, A. Mark Williams, Paul Ward and Christopher M. Janelle
Research focusing on perceptual-cognitive skill in sport is abundant. However, the existing qualitative syntheses of this research lack the quantitative detail necessary to determine the magnitude of differences between groups of varying levels of skills, thereby limiting the theoretical and practical contribution of this body of literature. We present a meta-analytic review focusing on perceptual-cognitive skill in sport (N = 42 studies, 388 effect sizes) with the primary aim of quantifying expertise differences. Effects were calculated for a variety of dependent measures (i.e., response accuracy, response time, number of visual fixations, visual fixation duration, and quiet eye period) using point-biserial correlation. Results indicated that experts are better than nonexperts in picking up perceptual cues, as revealed by measures of response accuracy and response time. Systematic differences in visual search behaviors were also observed, with experts using fewer fixations of longer duration, including prolonged quiet eye periods, compared with nonexperts. Several factors (e.g., sport type, research paradigm employed, and stimulus presentation modality) significantly moderated the relationship between level of expertise and perceptual-cognitive skill. Practical and theoretical implications are presented and suggestions for empirical work are provided.
A. Mark Williams and David Elliott
The effects of anxiety and expertise on visual search strategy in karate were examined. Expert and novice karate performers moved in response to taped karate offensive sequences presented under low (LA) and high anxiety (HA). Expert performers exhibited superior anticipation under LA and HA. No differences were observed between groups in number of fixations, mean fixation duration, or total number of fixation locations per trial. Participants displayed scan paths ascending and descending the centerline of the body, with primary fixations on head and chest regions. Participants demonstrated better performance under HA than under LA. Anxiety had a significant effect on search strategy, highlighted by changes in mean fixation duration and an increase in number of fixations and total number of fixation locations per trial. Increased search activity was more pronounced in novices, with fixations moving from central to peripheral body locations. These changes in search strategy with anxiety might be caused by peripheral narrowing or increased susceptibility to peripheral distractors.
Wesley Meeter and Kristen Dieffenbach
Stone, Stone and Sands (2005) noted the critical lack of sport science and research based coaching practices in the United States. They noted that current practices are commonly not based on a systematic approach to coaching that allows for both intentionally applied evidence based scientific principles and valid and reliable evaluation methods. Coaching is a profession that requires strong decision making skills, constant assessment, and consistent integration of new information for successful talent development and performance management. Like athletic talent development, the development of these professional skills and the overall development of coaching expertise takes time and deliberate effort (Schempp, 2006). Unfortunately, while formal coaching education program and sport science studies emphasize the physiological, technical and tactical sides of preparing athletes, less attention is paid to the formal development of critical thinking and self-assessment necessary for professional growth and development as a coach. Further, the prevalent grass roots ‘athlete to coach’ and ‘assistant to head’ mentorship models of coach development provide even fewer opportunities for the systematic and deliberate development of these crucial skills.
Tiago M. Barbosa, Wan Xiu Goh, Jorge E. Morais and Mário J. Costa
The aim was to examine the variation of linear and nonlinear proprieties of the behavior in participants with different levels of swimming expertise among the four swim strokes. Seventy-five swimmers were split into three groups (highly qualified experts, experts and nonexperts) and performed a maximal 25m trial for each of the four competitive swim strokes. A speed-meter cable was attached to the swimmer’s hip to measure hip speed; from which speed fluctuation (dv), approximate entropy (ApEn) and fractal dimension (D) variables were derived. Although simple main effects of expertise and swim stroke were obtained for dv and D, no significant interaction of expertise and stroke were found except in ApEn. The ApEn and D were prone to decrease with increasing expertise. As a conclusion, swimming does exhibit nonlinear properties but its magnitude differs according to the swim stroke and level of expertise of the performer.
Peter A. Hastie and Nik Vlaisavljevic
The ecological model was used to examine the relationship between subject matter expertise and the conduct of a teacher’s instructional task system. Nine teachers were studied when teaching activities with which they self-reported as having higher or lower levels of subject matter expertise. The findings suggest that higher levels of expertise by teachers in certain areas result in two specific changes in the academic work of physical education. The first is a provision of more tasks, and particularly more extending tasks, while the second is an accountability focus centered more so on the quality of the performance than a level of participation or effort.
Amanda Martindale and Dave Collins
This paper establishes current theoretical understanding on the development of professional judgment and decision-making (PJDM) expertise within applied sport psychology (ASP). Traditional and naturalistic paradigms of decision making are contrasted and the resulting blending of systematic analysis and intuition most appropriate for applied practice is explained through the concept of skilled intuition (Kahneman & Klein, 2009). Conditions for the development of skilled intuition are considered alongside recognition of the fragility of human judgment and the subtleties of the ASP environment. Key messages from cognitive psychology literature on the development of PJDM expertise are offered and recommendations made to facilitate the acquisition of decision-making expertise in ASP.
Aïmen Khacharem, Bachir Zoudji, Slava Kalyuga and Hubert Ripoll
Cognitive load perspective was used as a theoretical framework to investigate effects of expertise and type of presentation of interacting elements of information in learning from dynamic visualizations. Soccer players (N = 48) were required to complete a recall reconstruction test and to rate their invested mental effort after studying a concurrent or sequential presentation of the elements of play. The results provided evidence for an expertise reversal effect. For novice players, the sequential presentation produced better learning outcomes. In contrast, expert players performed better after studying the concurrent presentation. The findings suggest that the effectiveness of different visual presentation formats depend on levels of learner expertise.