Brown Locus of Control Scale – BLOCS
Assesses three aspects of locus of control: internal control, external social control, and external other control.
Scale Development & Technical Details
Scale Overview
The Brown Locus of Control Scale – BLOCS was developed by R. Brown (1990). It is designed to measure Locus of Control. The scale is intended for use with Adults.
Scale Structure
This instrument consists of 25 items organized into 3 factors/subscales: Internal, External Social, External Other.
| Factor / Subscale | Items | N |
|---|---|---|
| Internal | 4,9,13,16,19,20,21,22,25 | 9 |
| External Social | 1,6,7,8,10,11,14,15,23 | 9 |
| External Other | 2,3,5,12,17,18,24 | 7 |
Response Format
Respondents rate each item using a custom response format.
Response anchors: 1 = Very Strongly Disagree, 2 = Strongly Disagree, 3 = Disagree, 4 = Agree, 5 = Strongly Agree, 6 = Very Strongly Agree.
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 Alpha: 0.74 (Internal), 0.71 (External Social), 0.66 (External Other).
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.