Instruments
Evaluation of technique
In order to evaluate athletes’ ability in service technique, they were videotaped while executing 10 attempts.
Two experts in volleyball (volleyball coaches) observed the video and they evaluated the athletes’performance in five technical elements of the skill.
Intra and inter reliability of observers was checked (test-retest reliability).
The score in the check list (five technical elements), was “one” for correct and “zero” for
the wrong performance.
The perfect performance was evaluated as 50 points [10 attempts X (5 elements X 1 point)]