**Standardization and quality criteria**

The average error of the tracking deviation time was 2.3 ± 4.5 s in the calibration sample, the limit of the track deviations of healthy persons in a 95% confidence interval was < 13.2 s, 98% of healthy individuals have had values between 0 to 150 track deviations. The mean error of tolerance deviation time was 96.0 ± 177.0 s in the healthy person's, the limit of tolerance deviations of the calibration sample in a 95% CI was < 450.4 s (Büttner et al. 2000a/b, Büttner 2001).

The verification of the *reliability* using the *Cronbach alpha* was for the tracking component r = .9785, for the visual search r = .9666 and for the reaction time = .8943. The verification of the *test-retest reliability* (after 3 days) was for the tracking component rtt = .9855, for the visual search rtt = .9447 and for the reaction time rtt = .9211 (Büttner et al. 2000a/b, Büttner 2001).
