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Four-week test-retest stability of individual differences in the saccadic CNV, two saccadic task parameters, and selected neuropsychological tests

  • CH. KLEIN (a1) and P. BERG (a2)

Abstract

The aim of the present study was the comparative assessment of the 4-week test-retest stabilities of the saccadic CNV (sCNV) and saccadic reaction times (SRT) during the execution of pro- and antisaccades, as well as the stability of RT during execution of two neuropsychological tests of alertness and S-R incompatibility. Prosaccades were elicited under the 200-ms gap and overlap conditions, antisaccades under the overlap condition (64 trials each). The EEG was recorded from 25 channels with a DC amplifier (MES, Munich). Data of 20 healthy participants were statistically analyzed. We found high test-retest correlations for all SRT (.76 ≤ rtt ≤ .88) and neuropsychological (.62 ≤ rtt ≤ .88) measures. For the sCNV, coefficients ranging between .58 (pro/gap) and .77 (anti/overlap) were obtained. Whereas SRT were significantly faster during the second than during the first session, group means for the saccadic CNV were stable across the sessions. Our results suggest high 4-week stability of individual differences in SRT, and moderate to good stabilities of saccadic CNV amplitudes. Our results recommend these “traitlike” measures to be used in individual differences research.

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Corresponding author

Address reprint requests to: PD Dr. Christoph Klein, Psychophysiology Research Group, Department of Psychology, University of Freiburg, Belfortstrasse 20, D-79098 Freiburg, Germany. E-mail: klein@psychologie.uni-freiburg.de

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