Psychometrics are widely used for both selection and personal development. In particular, personality questionnaires are popular for feedback and coaching. They can be divided into three types:

- Those based on personality types, such as MBTI, where personality is seen as an innate quality which does not change.
- Personality trait questionnaires, such as 16PF, OPQ32 and Saville Wave. In these, personality is seen as a series of traits, which can be changed through personal reflection, feedback and coaching.
- Special purpose questionnaires examining an aspect of behaviour, such as emotional intelligence (for example, the MSCEIT), mental toughness (the MTQ48) or leadership (the TLQ). These are based on the belief that people can change.