[Test adaptation to other cultures: a practical approach].

Area of Science:

• Psychological Measurement
• Cross-Cultural Psychology
• Psychometrics

Background:

• Adapting psychological instruments across cultures is crucial for valid cross-cultural research.
• Established guidelines are essential to minimize errors during instrument adaptation.
• The NEO PI-R is a widely used measure of personality based on the Big Five model.

Purpose of the Study:

• To outline practical steps for adapting psychological instruments for cross-cultural use.
• To describe the adaptation and validation of the NEO PI-R from Spanish to Basque.
• To provide a methodological example for ensuring the validity of adapted psychological tests.

Main Methods:

• Following established guidelines for instrument adaptation.
• Empirical validation including dimensionality, convergent and differential validity assessment.
• Analysis of internal consistency and differential item functioning (gender, life stage).

Main Results:

• The Basque version of the NEO PI-R demonstrates adequate dimensionality and internal consistency.
• Evidence of convergent and differential validity was established for the adapted instrument.
• Differential item functioning analysis indicated no significant gender or life stage bias.

Conclusions:

• The Basque version of the NEO PI-R is a valid and reliable tool for assessing personality within the Big Five framework.
• The study provides a robust methodological approach for cross-cultural instrument adaptation.
• Successful adaptation ensures accurate psychological construct measurement across diverse linguistic and cultural groups.