REACTION TIME TEST INNOVATION OF TABLE TENNIS PERFORMANCE: AIKEN VALIDITY
Reaction time test is vital in table tennis talent identification and development. The purpose of this study was to test the reaction time test content validity of table tennis players. A mixture of qualitative and quantitative approaches was used in this study as the research method and took documents and experts as participants. The first stage of the study was conducted a qualitative approach using a literature review with narrative review techniques. The second stage was a content validation test using the Delphi technique. The study used a questionnaire with a rating scale of 1-4 (very relevant, relevant, less relevant, and irrelevant) as the research instrument. The data were analyzed using Aiken’s formula to test content validity. The results of the study showed that (1) the concept definition and operation of the table tennis reaction time, as well as the construction of the table tennis reaction time test, have been compiled, (2) the Aiken’s V coefficient value was above 0.76, meant that all aspects were valid, so it can be concluded that the test was quite reliable. The test of measuring the reaction time of table tennis players had a reasonably high Aiken validity.