A descriptive study to document undergraduate physical education majors' (22.8 ± 2.4 yr. old) estimates of sagittal plane elbow angle and angular velocity of elbow flexion visually was performed. 42 subjects rated videotape replays of 30 movements organized into three speeds of movement and two criterion elbow angles. Video images of the movements were analyzed with Peak Motus™ to measure actual values of elbow angles and peak angular velocity. Of the subjects 85.7% had speed ratings significantly correlated with true peak elbow angular velocity in all three angular velocity conditions. Few (16.7%) subjects' ratings of elbow angle correlated significantly with actual angles. Analysis of the subjects with good ratings showed the accuracy of visual ratings was significantly related to speed, with decreasing accuracy for slower speeds of movement. The use of criterion movements did not improve the small percentage of novice observers who could accurately estimate body angles during movement.
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References
1.
BernhardtJ.BateP. J.MatyasT. A. (1998) Accuracy of observational kinematic assessment of upper-limb movements. Physical Therapy, 78, 259–270.
2.
BernhardtJ.MatyasT.BateP. (2002) Does experience predict observational kinematic assessment accuracy?Physiotherapy Theory and Practice, 18, 141–150.
3.
BestR. J.BartlettR. M.SawyerR. A. (1995) Optimal javelin release. Journal of Applied Biomechanics, 11, 371–394.
4.
DenisD.LortieM.BruxellesM. (2002) Impact of observers' experience and training on reliability of observations for a manual handling task. Ergonomics, 45, 441–454.
5.
DouwesM.DulJ. (1991) Validity and reliability of estimating body angles by direct and indirect observations. In QueinmecY.DaniellouF. (Eds.), Designing for everyone, Proceedings of the International Ergonomics Association. London: Taylor & Francis. Pp. 885–887.
6.
GenaidyA. M.SimmonsR. J.GuoJ.HidalgoJ. A. (1993) Can visual perception be used to estimate body part angles?Ergonomics, 36, 328–329.
7.
GoonetillekeR. S. (1999) Legality of bowling actions in cricket. Ergonomics, 42, 1386–1397.
8.
KilaniH. D.TooD.AdrianM. J. (1989) Visual perception of biomechanical characteristics of walking, jumping, and landing. In TsarouchasJ.TeraudsJ.GowitzkeB. A.HoltL. E. (Eds.), Biomechanics of sport: V. Athens, Greece: Hellenic Sports Research Institute. Pp. 380–392.
9.
KnudsonD. (2003) Fundamentals of biomechanics. New York: Kluwer Academic/Plenum.
10.
KnudsonD. V. (1999) Validity and reliability of visual ratings of the vertical jump. Perceptual and Motor Skills, 89, 642–648.
11.
KnudsonD. V.MorrisonC. S. (2000) Visual ratings of the vertical jump are weakly correlated with perceptual style. Journal of Human Movement Studies, 39, 33–44.
12.
KnudsonD. V.MorrisonC. S. (2002) Qualitative analysis of human movement. (2nd ed.) Champaign, IL: Human Kinetics.
13.
LandyF. J.FarrJ. L. (1980) Performance rating. Psychological Bulletin, 87, 72–107.
14.
LeesA. (1999) Biomechanical assessment of individual sports for improved performance. Sports Medicine, 28, 299–305.
15.
LindemanB.LibkumanT.KingD.KrauseB. (2000) Development of and instrument to assess jump-shooting form. Journal of Sport Behavior, 23, 335–348.
16.
Marques-BrunaP.LeesA.ScottM. (2005) An integrated analytical model for the qualitative assessment of kicking effectiveness in football. In ReillyT.CabriJ.AraujoD. (Eds.), Science and football V. London: Routledge. Pp. 60–65.
17.
McGinleyJ. L.GoldieP. A.GreenwoodK. M.OlneyS. J. (2003) Accuracy and reliability of observational gait analysis data: judgments of push-off in gait after stroke. Physical Therapy, 83, 146–160.
18.
MorrisonC. S.FrederickC. M. (1998) Relationship of initial and final scores on a qualitative analysis movement test. Perceptual and Motor Skills, 87, 651–655.
19.
MorrisonC. S.ReeveE. J. (1989) Effect of different videotape instructional units on undergraduate physical education majors' qualitative analysis of skill. Perceptual and Motor Skills, 69, 111–114.
20.
MorrisonC. S.ReeveE. J. (1992) Perceptual style and instruction in the acquisition of qualitative analysis of movement by majors in elementary education. Perceptual and Motor Skills, 74, 579–583.
21.
MosherR. E.SchutzR. W. (1983) The development of a test of overarm throwing: an application of generalizability theory. Canadian Journal of Applied Sport Science, 8(1), 1–8.
22.
PatlaA. E.ClouseS. D. (1988) Visual assessment of human gait: reliability and validity. Rehabilitation Research, October, 87–96.
23.
PellecchiaG. L.GarrettG. E. (1997) Assessing lumbar stabilization for point-light and normal video displays of manual lifting. Perceptual and Motor Skills, 85, 931–937.
24.
RoseD. J.HeathE. M.MegaleD. (1990) Development of a diagnostic instrument for evaluating tennis serving performance. Perceptual and Motor Skills, 71, 355–363.
25.
RunesonS.FrykholmG. (1981) Visual perception of lifted weight. Journal of Experimental Psychology: Human Perception and Performance, 7, 733–740.
26.
StubergW.StrawL.DeuineL. (1990) Validity of visually recorded temporal-distance measures at selected walking velocities for gait analysis. Perceptual and Motor Skills, 70, 323–333.
27.
UlrichD. A.UlrichB. D.BrantaC. R. (1988) Developmental gross motor skill ratings: a generalizability analysis. Research Quarterly for Exercise and Sport, 59, 203–209.
