ON THE OBJECTIVITY OF THE KIHEMATIC DATA OBTAINED FROM KINEMATIC ANALYSES OF THE MOVEMENT

Abstract

The speed of the transmission of the research results into practice is one of the most important factors for the utilization of the research in sport. New generation of the kinematic analyses based on videotaping of the movement has brought the shortening of the time for elaboration of the taped material. The other possibility how to reduce the time of elaboration of the taped material is to involve more participants in the analysis. The presented paper is focused on the problem of objectivity of the kinematic data analyzed by different people. A special package of software for The Kinematic Analyses of Ski-jumping developed in our laboratory was used. The material taped at the top events - World Championship and World Cups in ski-jumping was used. The sets of university students (n = 10 to 30) have analyzed the taped phases of jumps. The results of the analyses were discussed with regards to various factors such as the quality of the instruction of people engaged in analysing, the experience with this method, the number of checked measurements and the control the final results. In the closing phase the elaboration of the material was realized by two persons who had been working with the system for the whole time of experiment. The results attained by one person during repeated analyses were used as the criterion of objectivity. The statistical analyses of measured values were the basis for derivation of the conditions which are necessary to respect to be able to use the results obtained by different persons for the research.