Scale Overview
The Investment Model Scale – Job (IMS-Job) was developed by Caryl E. Rusbult (1983). It is designed to measure Job Commitment. The scale is intended for use with Working adults.
Scale Structure
This instrument consists of 22 items organized into 6 factors/subscales: Rewards, Costs, Alternatives, Investments, Satisfaction, Commitment.
| Factor / Subscale |
Items |
N |
| Rewards |
1,2,3 |
3 |
| Costs |
4,5,6 |
3 |
| Alternatives |
7,8,9 |
3 |
| Investments |
10,11,12 |
3 |
| Satisfaction |
13,14,15,16,17,18 |
6 |
| Commitment |
19,20,21,22 |
4 |
Response Format
Respondents rate each item using a custom response format.
Response anchors: 1 = 1 (Low / Negative), 2 = 2, 3 = 3, 4 = 4, 5 = 5, 6 = 6, 7 = 7, 8 = 8, 9 = 9 (High / Positive).
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 Satisfaction (α = .90), Investments (α = .87), Alternatives (α = .82), Commitment (α = .88).
Administration
The scale is self-administered and typically takes approximately 8 minutes to complete. It can be administered individually or in group settings. No special training is required for administration.