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Author Schweitzer, N.; Apter, Y.; Ben-David, J.; Liebermann, D.G.; Parush, A.
Title A field study of braking reactions during driving II: Minimum driver braking times Type Journal Article
Year 1995 Publication Ergonomics Abbreviated Journal
Volume 38 Issue 9 Pages 1903-1910
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Abstract The minimum total braking time (i.e. the braking reaction time plus the accelerator-to-brake movement time) plays an important role in defining a minimum following gap (MFG). This study was designed to obtain a lower limit for this gap. Total braking times (TBT) of a group of 51 male and female young athletes were monitored during real driving conditions. Sudden braking applied by a leading private passenger vehicle initiated the trials. A within-subject design was used to study the effects of different factors on braking time. Individuals performed a series of semi-counterbalanced trials at two following distances (6 and 12 m), two speeds (60 and 80 km/h) and three expectancy stages (naïve driving, partial knowledge, and full knowledge of the forthcoming manoeuvre). A three-way repeated measures ANOVA showed no major effects of ‘speed’, but major effects of the ‘expectancy’ and the ‘distance’ factors. The experiment yielded a mean TBT of 0·678 s (SD = 0·144 s) for trials averaged over distances and speeds in the naïve condition only. The data emphasize the role played by pre-cues in the braking response prior to emergency stops. Both the level of awareness of the forthcoming manoeuvre and the distance between vehicles appear to determine the response time. The descriptive statistics presented may also provide the basis for an objective, acceptable and legally valid minimum time gap for prosecution of ‘careless’ drivers.
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Call Number Serial 58
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Author Tenenbaum, G.; Kohler, N.; Shraga, S.; Liebermann, D.G.; Lidor, R.
Title Anticipation and confidence of decisions related to skilled performance Type Journal Article
Year 1996 Publication Journal of Sport Psychology Abbreviated Journal
Volume 27 Issue Pages 293-307
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Abstract This study was carried out to examine anticipatory decisions of novice, intermediate, and expert tennis players and the confidence with which these decisions are made by these athletes. Perceived eye-focus was also measured to verify whether it is related to expertise level prior to action execution. Forty-five Australian players, 15 in each skill category, were exposed to 6 temporal occluded film conditions (480, 320, 160 ms prior to racquet-ball contact, at contact, and 160 and 320 ms after contact) in randomized order within 8 tennis strokes. In each condition, after viewing the filmed sequence, they were asked to report the final ball location of the opponent's stroke, how confident they were in this decision, and their perceived eye-focus location during the sequence. Experts and intermediates were superior in anticipatory decisions to their counterparts, only under short exposure durations. Novices showed more confidence than experts and intermediates at the beginning of the sequence, but after 160 and 320 ms of ball-racquet contact, experts were much more confident than novices, and intermediates. Self-reported eye-focus differed substantially with respect to expertise level. While experts attended to several locations prior to ball-racquet contact, intermediate and novice players gazed at one location. After contact, the reverse was evident. The findings are in partial agreement with other studies which have applied the temporal occlusion paradigm to study expert-novice differences in anticipatory skills.
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Call Number Serial 59
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Author Liebermann, D.G.; Issurin V.
Title Effects of vibratory stimulation on the perception of effort during isotonic contractions Type Journal Article
Year 1997 Publication Journal of Human Movement Studies Abbreviated Journal
Volume 32 Issue Pages 171-186
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Call Number Serial 61
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Author Uri, O.; Pritsch, M.; Oran, A.; Liebermann, D.G.
Title Upper limb kinematics after arthroscopic and open shoulder stabilization Type Journal Article
Year 2014 Publication Journal of Shoulder and Elbow Surgery Abbreviated Journal Journal of Shoulder and Elbow Surgery
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ISSN 1058-2746 ISBN Medium
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Notes Approved no
Call Number Serial 75
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Author Liebermann, D.G.; Katz, L.; Hughes, M.D.; Bartlett, R.M.; McClements, J.; Franks, I.M.
Title Advances in the application of information technology to sport performance Type Journal Article
Year 2002 Publication Journal of Sports Sciences Abbreviated Journal J Sports Sci
Volume 20 Issue 10 Pages 755-769
Keywords *Biofeedback, Psychology; *Computer Simulation; Humans; Models, Biological; Physical Education and Training/*methods; Psychomotor Performance/physiology; Sports Medicine/methods; *Task Performance and Analysis; Videotape Recording
Abstract This paper overviews the diverse information technologies that are used to provide athletes with relevant feedback. Examples taken from various sports are used to illustrate selected applications of technology-based feedback. Several feedback systems are discussed, including vision, audition and proprioception. Each technology described here is based on the assumption that feedback would eventually enhance skill acquisition and sport performance and, as such, its usefulness to athletes and coaches in training is critically evaluated.
Address Department of Physical Therapy, Sackler Faculty of Medicine, University of Tel Aviv, Israel
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Language English Summary Language Original Title
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ISSN 0264-0414 ISBN Medium
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Notes PMID:12363293 Approved no
Call Number Serial 40
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