Scale Overview
The HIV Treatment Adherence Self-Efficacy Scale – HIV-ASES was developed by Johnson, M. O., Neilands, T. B., Dilworth, S. E., Morin, S. F., Remien, R. H., & Chesney, M. A. (2007). It is designed to measure HIV Treatment Adherence Self-Efficacy. The scale is intended for use with Adults living with HIV.
Scale Structure
This instrument consists of 12 items organized into 2 factors/subscales: Adherence Integration, Adherence Perseverance.
| Factor / Subscale |
Items |
N |
| Adherence Integration |
2,3,4,6,12 |
5 |
| Adherence Perseverance |
1,5,7,8,9,10,11 |
7 |
Response Format
Respondents rate each item using a custom response format.
Response anchors: 1 = Cannot do it at all, 2 = 2, 3 = 3, 4 = 4, 5 = 5, 6 = 6, 7 = 7, 8 = 8, 9 = 9, 10 = Certain can do it.
Scoring
Items are scored by subscale, with each subscale sum representing a distinct dimension.
Total scores range from 1 to 10. Interpretation guidelines:
- Low Self-Efficacy: 1 – 4
- Moderate Self-Efficacy: 5 – 7
- High Self-Efficacy: 8 – 10
Psychometric Properties
Internal Consistency: The scale has demonstrated good to excellent internal consistency with reported Cronbach’s alpha values of alpha > .90.
Administration
The scale is self-administered and typically takes approximately 5 minutes to complete. It can be administered individually or in group settings. No special training is required for administration.