[Training effects in computer-assisted psychological performance tests].

Objectives: Reproducibility of results achieved by psychological performance tests is a precondition to quantify reliable cognitive and psychomotoric behaviour alterations after interventions. However, evidence exists that repeated processing leads to training effects which influence results. Therefore it is essential to elucidate these training effects.

Methods: Ten subjects (6 men and 4 women, 42 +/- 12, 5 years) carried out two computer based performance tests of the "Wiener Testsystem" (WTS), the Determinationstest (DT) and the Arbeitsleistungsserie (ALS). Both tests were performed five times by each test person. Training effects and contrasts were analyzed with one-way analysis of variance (ANOVA) for repeated measures.

Results: A significant "training" effect (p
Conclusion: Repeated testing of computer-assisted cognitive and psychomotoric performance tests resulted in significant test improvements which are most likely caused by training effects and increased familiarity with the test system and therefore probably cannot be interpreted as real cognitive improvements. In conclusion, positive effects evaluated with performance tests, e.g. before and after interventions, should be interpreted with regard to these results.