[Electroencephalogram in standardized mental stress: variable trends in the theta, alpha and beta band].

The results, gained in previous studies by means of computer-assisted interval analysis and amplitude analysis, of power spectra as well as of visuomanual pattern evaluation of the EEG during standardized mental load, were related to each other. Described are the significantly requirement-dependent trends of data in there three frequency bands. Under consideration of methodological rules (complementarity, non-reactive measuring, multivariate representation, balanced change-over design, multidimensional data analysis etc.) a characterization of the EEG functional test (graded cognitive strain, eyes opened) is given.