Stanford Social Dimensions Scale (SSDS)
What is SSDS
The SSDS was developed by researchers from the Stanford Autism Center to enable detailed assessment of key social processes and skills that, if impaired, can impede one’s ability to navigate the complexities of the social world. These processes include first and foremost the motivation to engage in social interactions, as well as skills necessary for initiating, maintaining, and ending social interactions and the ability to perceive and interpret social signals. Disruption of any of these processes can result in social deficits seen in people with a diagnosis of autism spectrum disorder (ASD) and with range of other neurodevelopmental and neuropsychiatric disorders. Therefore, the SSDS allows researchers and clinicians to gain a detailed insight into strengths and weaknesses in key social skills for each individual. The SSDS was developed, refined and validated through several iterative steps.
The SSDS was developed, refined and validated through several iterative steps.
Development: An initial set of items was conceptually developed after a comprehensive literature review, and through consultation with clinical and research experts in the field of ASD. A broad set of items were designed to tap assess (i) drive or desire to interact socially and affiliate with others; (ii) ability to communicate through facial and non-facial expressions (body posture, gestures and prosody); (iii) ability to recognize basic social and emotional signals conveyed through the face, body, and tone of voice and the ability to interpret mental states.
Validation: Items were piloted online with a group of 100 parents of typically developing children and children with a range of neurodevelopmental and neuropsychiatric disorders to evaluate whether parents perceived items as meaningful and applicable to their child and whether any of the items were unclear or difficult to understand. Ninety-seven percent of parents indicated that they considered questions as moderately to highly meaningful and 88% reported no issues with item clarity. Factor analysis was conducted in (i) a sample of 175 children and adolescents with ASD and (ii) a separate sample of 624 children who were either typically developing or had a diagnosis of neurodevelopmental or neuropsychiatric disorder. The following five-factors emerged across both samples:
- Social Motivation (example items, “In a social situation, attempts to play with other children instead of avoiding the group”, “Prefers to play with children rather than alone”)
- Social Affiliation (example items, “Will try to get my attention or interact with me, without being reminded to do so,” “When enjoying something, he/she tries to share that enjoyment with me”)
- Expressive Social Communication ( “Vocalizes and makes eye contact with me when he/she makes a request” and “When a familiar person tries to engage with my child, she/he responds positively and appropriately by smiling, saying hello etc”)
- Social Recognition (example items, “Understands complex nonverbal gestures used by another person” and “Reads subtle emotions [ex: ashamed, jealous, pleased] in others through their facial expressions”)
- Unusual Approach (example items, “Begins interactions/conversations in ways that seem unusual to others” and “Has trouble understanding personal space (e.g., stands too close to others when interacting)”)
Derived factors showed excellent reliability and construct validity (as evidenced by Composite Reliability Index scores ≥ .72 and item-item and item-subscale correlations) and strong convergent and divergent validity (as evidenced by the pattern of correlations with a range of other social functioning and general psychopathology measures).
Where can I found out more about the research using the SSDS
You can find more detailed information on the SSDS development and validation by reading our paper published in the Molecular Autism by clicking here .
You can read on the usefulness of the SSDS for identifying subgroups of individuals with ASD who show specific profiles of strengths and weaknesses across different social processes and skills in our paper published in Autism Research by clicking here .
SSDS Description, Administration and Scoring
How to Obtain the SSDS
The SSDS is available free of charge for use in research and clinical practice. The SSDS was originally developed in English. We are currently working on translation and validation of the SSDS to other languages and several translations are already available. As more become available, we will provide download links in this section. In case you are interested in translating the SSDS, please contact us at firstname.lastname@example.org