Reliability and Validity of the Enhanced Big Five Personality Test (B5T)

The Big Five Personality Test (B5T) was first developed in 2010 with the aim of measuring the five fundamental personality dimensions of Neuroticism (N), Extraversion (E), Conscientiousness (C), Agreeableness (A) and Openness (O) (Allport, 1937; Cattell, 1957, 1965; Eysenck, 1947; Goldberg, 1981, 1993; Norman, 1963; Tupes & Christal, 1961). With a convincing factorial structure and high reliability (Cronbach's Alpha), it was shorter than previous procedures (McCrae & Costa, 2004) and was also suitable for use in a professional context (career counseling, personnel selection, personnel development, coaching). In order to also measure the potential and direction of a person, the inventory was later supplemented by three scales for capturing the basic needs for achievement (achievement motive), power (power motive) and security (security motive). After a first large standardization and validation study in 2012, the inventory was re-examined during 2020 using a large sample (n = 21,048). All scales achieved convincing psychometric values (Conrbach's alpha between .76 and .90), which hardly differed from the values from 2012. The factorial structure could be confirmed in confirmatory factor analyzes. There were clear connections with occupation, which suggest that the enhanced inventory is suitable for use in a professional context. The B5T is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. All language versions and further details are available from www.drsatow.de/tests/