Negative and Positive Affect Scale – NAPAS
A self-report scale designed to measure the frequency of positive and negative affect over the past 30 days.
Scale Development & Technical Details
Scale Overview
The Negative and Positive Affect Scale – NAPAS was developed by Mroczek, D. K., & Kolarz, C. M. (1998). It is designed to measure Positive and Negative Affect. The scale is intended for use with Adults.
Scale Structure
This instrument consists of 12 items organized into 2 factors/subscales: Negative Affect, Positive Affect.
| Factor / Subscale | Items | N |
|---|---|---|
| Negative Affect | 1,2,3,4,5,6 | 6 |
| Positive Affect | 7,8,9,10,11,12 | 6 |
Response Format
Respondents rate each item using a custom response format.
Response anchors: 1 = None of the time, 2 = A little of the time, 3 = Some of the time, 4 = Most of the time, 5 = All the time.
Scoring
Items are scored by subscale, with each subscale sum representing a distinct dimension.
Total scores range from 6 to 30. Interpretation guidelines:
- Low Affect: 6 – 12
- Moderate Affect: 13 – 23
- High Affect: 24 – 30
Psychometric Properties
Internal Consistency: The scale has demonstrated good to excellent internal consistency with reported Cronbach’s alpha values of Acceptable reliability.
Administration
The scale is self-administered and typically takes approximately 3 minutes to complete. It can be administered individually or in group settings. No special training is required for administration.