Irrational Belief Test (IBT)
A 100-item self-report instrument designed to measure Albert Ellis's system of irrational beliefs across ten distinct subscales.
Scale Development & Technical Details
Scale Overview
The Irrational Belief Test (IBT) was developed by Richard G. Jones (1968). It is designed to measure Irrational Beliefs. The scale is intended for use with Adults.
Scale Structure
This instrument consists of 100 items organized into 10 factors/subscales: Demand for Approval, High Self-Expectations, Blame Proneness, Frustration Reactive, Emotional Helplessness, Anxious Overconcern, Problem Avoidance, Dependency, Helplessness for Change, Perfectionism.
| Factor / Subscale | Items | N |
|---|---|---|
| Demand for Approval | 1,11,21,31,41,51,61,71,81,91 | 10 |
| High Self-Expectations | 2,12,22,32,42,52,62,72,82,92 | 10 |
| Blame Proneness | 3,13,23,33,43,53,63,73,83,93 | 10 |
| Frustration Reactive | 4,14,24,34,44,54,64,74,84,94 | 10 |
| Emotional Helplessness | 5,15,25,35,45,55,65,75,85,95 | 10 |
| Anxious Overconcern | 6,16,26,36,46,56,66,76,86,96 | 10 |
| Problem Avoidance | 7,17,27,37,47,57,67,77,87,97 | 10 |
| Dependency | 8,18,28,38,48,58,68,78,88,98 | 10 |
| Helplessness for Change | 9,19,29,39,49,59,69,79,89,99 | 10 |
| Perfectionism | 10,20,30,40,50,60,70,80,90,100 | 10 |
Response Format
Respondents rate each item using a 5-point Likert scale (1 = Strongly Disagree to 5 = Strongly Agree).
The scale includes 53 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 0.67 – 0.86.
Administration
The scale is self-administered and typically takes approximately 20 minutes to complete. It can be administered individually or in group settings. No special training is required for administration.