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A new natural stereotest was designed for measuring stereoacuity gradually. Borderline values were established. It is possible to separate persons without normal stereoscopic vision from persons with satisfactory, good or excellent stereoacuity in a very short time. This new stereo-normtest can be used for fitness examinations.

A new sociometric approach has been used to objectify the relative position of the therapeutist in group psychotherapy through the use of such parameters as valency and potency. The method described in this paper may be used for determining the course of therapy and provides information about the proper functioning of the group and the influence of the therapeutist upon the patients participating in psychotherapy. This allows undesirable effects to be corrected.

Normal stereoscopic vision is necessary for many occupations. Therefore, stereoacuity must be measured accurately. Borderline values are not yet available for existing stereo-tests or, as for haploscopic tests, their degree of difficulty is too low. In order to provide an accurate, natural measuring method for both scientific and practical applications, an existing three-rod tester was modified to convert it into a distant-vision stereo-tester, and a new near-vision stereo-tester was designed. A standardized test method was developed and borderline values were established for both units.

The principle of auditive analysis is that the type and degree of different emotional states expressed in the voices of the mentally ill are analyzed as accurately as possible. Patients receiving group centred non-directive treatment were examined by this method and the results were compared with those obtained by sociometric tests. It was found that patients, and also psychotherapists, with high standards of auditive ability were accepted into the group and were popular, whereas persons with poor auditive ability were rejected by the group. Experiments with the same method in the GDR yielded the same results as in the USSR. The application of this method as a means of checking the success of training in group centres non-directive therapy is being considered.