Scale Overview
The Adult ADHD Self-Report Scale – ASRS v1.1 was developed by World Health Organization (WHO) (2003). It is designed to measure Adult ADHD Symptoms. The scale is intended for use with Adults.
Scale Structure
This instrument consists of 18 items organized into 2 factors/subscales: Part A (Screener), Part B (Symptom Checklist).
| Factor / Subscale |
Items |
N |
| Part A (Screener) |
1,2,3,4,5,6 |
6 |
| Part B (Symptom Checklist) |
7,8,9,10,11,12,13,14,15,16,17,18 |
12 |
Response Format
Respondents rate each item using a custom response format.
Response anchors: 0 = Never, 1 = Rarely, 2 = Sometimes, 3 = Often, 4 = Very Often.
Scoring
Items are summed to produce a total score.
Total scores range from 0 to 72. Interpretation guidelines:
- Low likelihood of ADHD: 0 – 23
- High likelihood of ADHD (Further clinical assessment recommended): 24 – 72
Psychometric Properties
Internal Consistency: The scale has demonstrated good to excellent internal consistency with reported Cronbach’s alpha values of High internal consistency and validity.
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.