International Personality Item Pool Big-Five Factor Markers (IPIP-B5)
A 50-item self-report instrument measuring the Big Five domains of personality.
50 Questions
~13 min
Likert 5
Scale Development & Technical Details
Scale Overview
The International Personality Item Pool Big-Five Factor Markers (IPIP-B5) was developed by Lewis R. Goldberg (1999). It is designed to measure Big Five Personality Traits. The scale is intended for use with Adults.
Scale Structure
This instrument consists of 50 items organized into 5 factors/subscales: Extraversion, Agreeableness, Conscientiousness, Emotional Stability, Openness.
Factor / Subscale
Items
N
Extraversion
1,6,11,16,21,26,31,36,41,46
10
Agreeableness
2,7,12,17,22,27,32,37,42,47
10
Conscientiousness
3,8,13,18,23,28,33,38,43,48
10
Emotional Stability
4,9,14,19,24,29,34,39,44,49
10
Openness
5,10,15,20,25,30,35,40,45,50
10
Response Format
Respondents rate each item using a 5-point Likert scale (1 = Strongly Disagree to 5 = Strongly Agree).
The scale includes 24 reverse-scored items to reduce acquiescence bias.
Scoring
Items are scored by subscale, with each subscale sum representing a distinct dimension.
Psychometric Properties
Internal Consistency: The scale has demonstrated good to excellent internal consistency with reported Cronbach’s alpha values of Neuroticism/Emotional Stability: 0.83, Extraversion: 0.81, Openness: 0.71, Agreeableness: 0.78, Conscientiousness: 0.82.
Administration
The scale is self-administered and typically takes approximately 10 minutes to complete. It can be administered individually or in group settings. No special training is required for administration.