Autism Spectrum Disorder (ASD) is a neurodevelopmental disorder that is characterized by impairments in social communication and interaction and by the presence of restricted and repetitive patterns of behaviors, interests, or activities (American Psychiatric Association, 2013). The impairments in social communication and interaction result in limited socio-emotional reciprocity, ranging from not being able to initiate contact to initiating or responding to social contact in a way that is deviant and that may be inappropriate. Other impairments concern non-verbal communication (for example initiating and maintaining eye contact) and developing, maintaining, and understanding relationships (for example engaging in reciprocal conversations, emotion recognition, empathy, joint attention, and recognition of social cues; American Psychiatric Association, 2013).ASD is a heterogeneous disorder that manifests in many different ways. The expression of impairments differs between children and over time (Lord et al., 2020). Besides ASD, other disorders often co-occur in children with ASD, such as Attentiondeficit/hyperactivity Disorder (ADHD), anxiety, depression, and epilepsy. The current mean prevalence of ASD in the United States is approximately 1.5-2% in children aged 8 years (Maenner et al., 2020) and in Europe between 0.4% and 3.1% (Chiarotti & Venerosi, 2020).
GeneralizationApart from the effects of SST in children with ASD on the specific social skills as learned during the training, a few other aspects should be considered when studying the effect of SST. One of these is the generalization of learned social-communicative skills in order to appropriately interact in daily life situations.Although generalization of learned social skills to situations beyond the training is an important assumption of SST, only few studies have investigated this generalization to different daily life situations (