Adorno et al. (1950) proposed that prejudice is the results of an individual’s personality type. They piloted and developed a questionnaire, which they called the F-scale (F for fascism).
Adorno argued that deep-seated personality traits predisposed some individuals to be highly sensitive to totalitarian and antidemocratic ideas and therefore were prone to be highly prejudicial.
The evidence they gave to support this conclusion included:
• Case studies, e.g., Nazis
• Psychometric testing (use of the F-scale)
• Clinical interviews revealed situational aspects of their childhood, such as the fact that they had been brought up by very strict parents or guardians, which were found of participants who scored highly on the F-scale not always found in the backgrounds of low scorers.