“…Interestingly, the social behavioral phenotype of those with WSS are in part similar to another neurogenetic condition, Williams syndrome, a disorder caused by a deletion on the long arm of chromosome 7 (7q11.23). Those with Williams syndrome are characterized by intellectual impairment or developmental delay, overly friendly and gregarious behaviors, high approachability and reduced stranger danger awareness, and aberrations in processing of social versus non‐social information (Järvinen‐Pasley et al, 2008), all of which leaves these individuals socially vulnerable (Jawaid et al, 2012) and at risk for peer relationship challenges (e.g., maintaining friendships, social exclusion) (Gillooly et al, 2021). Although cross‐syndrome comparisons between those with Williams syndrome and ASD have shown contrasting phenotypes in social affiliative nature (interest in interacting with others) and face processing, commonalities in social communication and cognitive deficits have been reported (Asada & Itakura, 2012; Barak & Feng, 2016; Klein‐Tasman et al, 2009), highlighting the importance of comprehensive ASD evaluations and caution against diagnostic overshadowing given high co‐occurrence with intellectual disability or developmental delay (Klein‐Tasman et al, 2009).…”