[Effects of time variables (time-blind, time gap) on quantitative evaluation of psychopathology].

Are the objectivity and sensibility of quantitative psychopathology influenced by certain methodological conditions (time-blind evaluation or not, chronological order or random order, suppression of the time gap between two evaluations or not)? Different evaluations of AMDP videotaped interviews were not able to demonstrate systematic effects of these temporal conditions on the evaluation itself. Other variables (monotony, order of sequences, verbal inertia, contingencies) might well play a greater role. Within the methodological limits of the present study, the time-blind evaluation was the most sensitive.

[Validation of a depression threshold: the Hamilton scale].

We propose a method to suggest cut-off scores for the Hamilton Depression Scale. Two ones are found for the 24 items scale, i.e.

[Critical flicker fusion frequency in psychopathology and psychopharmacology. Review of the literature].

As far back as the second century, Ptolemy reported the apparent immobility of wheel radius at a certain speed. The psychophysical laws of this flicker fusion phenomenon related to the frequency of the light stimulus were established in 1834-1835 by the Englishman Talbot and by the Belgian Plateau, whose thesis in Liège is described as a landmark in the field. CFF is more a measurement of cortical arousal than of visual functions.