Overview
The SUIS is a self-report scale of visual mental imagery. Translations include Dutch, Japanese and Polish.Scoring & Interpretation
The SUIS is a 12-item measure which asks respondents about the frequency and likelihood that they experience visual mental images in daily life. For each item, respondents are asked to record how appropriate an item is to them, on a 5-point scale ranging from "never appropriate" to "always completely appropriate". Responses to all items are summed, with a maximum score of 60. Higher scores correspond to increased frequency and likelihood of visual mental imagery.Psychometric Properties
Internal Consistency
In the original validation paper, internal consistency was calculated by correlation calculations between each item and the scale's total minus that item. For each item, this produced a correlation of .98, showing the measure has extremely high internal consistency.
Test-Retest Reliability
Nelis et al., (2014) examined the reliability of the SUIS over time in adults by comparing scores at baseline with scores five months later: r = .69.
Factor Structure
Validity
Inverse correlation between the SUIS and scores on a measure of vividness of visual mental imagery and a measure of mental imagery across the sensory modalities (where higher scores on both scales indicated less vividness of imagery) (Nelis et al., 2014) support convergent validity.
Measurement Invariance
Not reported.
Access
Available to download from Harvard Edu.https://kosslynlab.fas.harvard.edu/sites /projects.iq.harvard.edu/files/kosslynlab/files/suis_020301.pdf