Reliability of subjective evaluation in assessing elite table tennis players’ performance

Observers with table tennis skill levels demonstrate high intra-observer test-retest reliability in subjective evaluations, but the inter-observer consistency is lower. Different information conditions (with or without results) are key variables affecting the consistency of subjective evaluations. When kinematic information is occluded (without results), the consistency of subjective evaluations decreases. The selection of observation indicators also impacts the consistency of subjective evaluations. Additionally, observers' consistency in subjective evaluations is influenced by their level of experience and skill: the higher the observer's level and experience, the greater the consistency of their subjective evaluations.