[Internal and external stress and tybamate and secobarbital: an experimental investigation of their interactions (author's transl)].

This investigation was carried out to test the hypotheses that the reactions associated with external stress are better reduced by barbiturates while meprobamat-type tranquilizers reduce principally internal stress. To test the interaction of medication and type of stress a 3X3 plan was used with independent groups. The medication conditions were: placebo, 500 mg tybamate, and 100 mg secobarbital, and the stress conditions were: white noise of 95 dB intensity (external stress), fictitious assessments of the subject with high negative content (internal stress) and a non-stress situation. The paper deals with the main effects on physiological and subjective variables as the result of a covariance analysis. No interactions were found.