Abstract: The Diagnostic and Statistical Manual of Mental Disorders, 5th Edition (DSM-5) (American Psychiatric Association, 2013) defines autism spectrum disorder (ASD) as a complex neurodevelopmental disorder that begins in early childhood and is accompanied by social communication deficits and repetitive stereotyped behaviors. According to the monitoring data released in 2021 in the United States, the prevalence of ASD in children was as high as 2.27%; that is, one in 44 children had autism (Maenneret al., 2021). China publicly reported this figure to be around 0.7% (Zhou et al., 2020). The current view is that children with ASD are generally impaired in their adaptation ability (McDonaldet al., 2016; Hodgeet al., 2021; Opertoet al., 2021). Adaptive behaviors comprise the conceptual, social, and practical skills that enable individuals to adapt to the environment, which play an important role in daily life (McDonald et al., 2019). “Adaptive behavior” was first described by Doll (1936). Subsequently, abnormalities in adaptive behavior were included in the criteria for intellectual disability for the first time (Heber, 1961). The American Association on Mental Retardation (AAMR) has refined and specified this term several times. Researchers hold different opinions on the structure of social adaptive capability. Greenspan and Granfield (1992) divided social adaptive capability into social understanding and social interaction. However, an increasing number of scholars considered that the concept of adaptive behaviors in children was constructed via multiple dimensions. The most representative one among them was the Vineland Adaptive Behavior Scales (VABS) proposed by Sparrow et al. (1984). This scale illustrates that adaptive behavior includes communication, daily living skills, socialization, and motor skills. Harrison and Oakland (2003) developed an Adaptive Behavior Assessment System (ABAS), by applying the theory of adaptive behavior proposed by AAMR and the American Association on Intellectual and Developmental Disabilities (AAIDD). This system shows that adaptive behavior has three adaptive composites, namely, conceptual composite (including communication, learning function, and self-management), social composite (including leisure and social skills), and practical composite (including community application, home living, health and safety, and self-care). As there are different requirements for the social adaptive capability of children from different cultural backgrounds and various regions, Chinese scholars have translated the Normal Development of Social Skills from Infant to Junior High School Children (S-M) scale compiled by Japanese scholars into Chinese, which is now widely used in China (Zhang et al., 1995). The impairment of adaptive function in children with ASD includes multiple dimensions, such as socialization, communication, and daily living skills (Kanne et al., 2011), and the degree of impairment can predict the prognosis and outcome in real life, including education acquisition and independent living ability (Farley et al., 2009). Therefore, adaptive behavioral capacity is considered to be a key intervention point that directly affects the individual and social outcomes of autistic children (Veenstra-VanderWeele et al., 2017; Bölte et al., 2019).

Key words: Autism spectrum disorder (ASD); Child; Adaptive behavior; Early developmental level; Individualized intervention

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