Newcastle Personality Assessor

What is the Newcastle Personality Assessor?

The Newcastle Personality Assessor (NPA) is a brief self-report questionnaire developed by Daniel Nettle to assess the Big Five personality dimensions: Extraversion, Neuroticism, Conscientiousness, Agreeableness and Openness.

How was the NPA developed?

In the appendix and development notes to Personality: What Makes You the Way You Are (2007), Nettle describes selecting two or three items per dimension by comparing candidate questions with a longer personality measure in an online volunteer sample. The 50-item questionnaire used for comparison was an International Personality Item Pool measure, not the NPA itself.

How do responses become trait scores?

Nettle’s book asks people to consider their usual behavior when responding, rather than an exceptional day or an idealized self. In his published short-form instructions, respondents rate likelihood, reverse specified responses, and sum the assigned items for each trait. Use the scoring key supplied with the particular version; the result is a profile across dimensions, not one overall personality grade.

For example, imagine a profile showing higher Conscientiousness and lower Extraversion. As a hypothetical interpretation, this might describe someone who prefers to prepare carefully and keep social activity relatively quiet. It does not mean that the person never acts spontaneously, cannot enjoy company, or is suited to a specific occupation. A useful next step is to compare that interpretation with examples from different parts of the person’s life.

Uses and limits of the Newcastle Personality Assessor

The NPA offers a short introduction to trait assessment. Its development correlations do not establish every clinical or employment use, and self-reports depend on how people interpret and answer the questions. Nettle recommends a longer measure when time permits. Scores describe tendencies rather than a complete or permanent description of personality.