Subject Impressions Questionnaire (SIQ)
Measures participants' subjective experience of interest/enjoyment, perceived choice, pressure/tension, effort, and relatedness during a dyadic interaction.
Scale Development & Technical Details
Scale Overview
The Subject Impressions Questionnaire (SIQ) was developed by Edward L. Deci & Richard M. Ryan (1989). It is designed to measure Subjective experience of dyadic interaction (adapted from the Intrinsic Motivation Inventory). The scale is intended for use with Adults participating in dyadic experiments.
Scale Structure
This instrument consists of 29 items organized into 5 factors/subscales: Interest/Enjoyment, Relatedness, Pressure/Tension, Perceived Choice, Effort/Importance.
| Factor / Subscale | Items | N |
|---|---|---|
| Interest/Enjoyment | 1,5,7,8,11,18,22 | 7 |
| Relatedness | 2,6,10,13,16,21,24,26 | 8 |
| Pressure/Tension | 3,9,12,17,23 | 5 |
| Perceived Choice | 4,14,19,25,28 | 5 |
| Effort/Importance | 15,20,27,29 | 4 |
Response Format
Respondents rate each item using a custom response format.
Response anchors: 1 = not at all true, 2 = 2, 3 = 3, 4 = somewhat true, 5 = 5, 6 = 6, 7 = very true.
The scale includes 11 reverse-scored items to reduce acquiescence bias.
Scoring
Items are scored by subscale, with each subscale sum representing a distinct dimension.
Total scores range from 1 to 7. Interpretation guidelines:
- Low level of the subscale construct: 1 – 3
- Moderate level of the subscale construct: 3 – 5
- High level of the subscale construct: 5 – 7
Psychometric Properties
Internal Consistency: The scale has demonstrated good to excellent internal consistency with reported Cronbach’s alpha values of Typically high (Cronbach's alpha > 0.80 for subscales).
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.