The Gießen Personality Questionnaire (German: Gießen-Test, GT) was developed at the University of Gießen in Germany and first published in 1972. It is a multidimensional personality inventory used to assess various aspects of personality. The methodology includes 40 items and evaluates six core personality scales:
- Social Approval Scale (Soziale Extraversion - SE) – the ability to interact successfully with the environment and the subjective perception of one's social role.

- Dominance Scale (Dominanz - D) – power and influence versus submission and compliance as psychosocial defensive behaviors.

- Control Scale (Kontrolle - K) – the capacity for self-control and the degree to which it is manifested (from relaxation to rigidity).

- Basic Mood Scale (Grundstimmung - GS) – emotional background and ways of handling internal conflicts (aggression directed inward or outward).

- Openness – Reticence Scale (Offenheit - Abgeschlossenheit - OE/A) – the degree of openness toward others and the development of basic trust.

- Social Capacity Scale (Soziale Potenz - SP) – the level of personality maturity, the capacity for active social interaction, and emotional richness.

In addition to the primary scales, the questionnaire includes two validity scales that allow for the analysis of response patterns:
- Median Response Scale (M) – designed to evaluate the nature of response selection, reflecting the frequency of choosing a neutral position.

- Extreme Response Scale (E) – designed to evaluate the nature of response selection, reflecting the frequency of using the most categorical ratings.

The "He" version of the Gießen Personality Questionnaire (GT) is a form of external assessment in which the respondent describes a specific, well-known male individual. The methodology is designed to identify the characteristics of how another person is perceived and can be used to compare results with the "I" version, providing a more comprehensive understanding of interpersonal perception and the nature of interaction.