utism spectrum disorder (ASD) is a neurodevelopmental disorder characterized by the presence of restrictive and repetitive patterns of behavior, interests, or activities, as well as persistent difficulties in communication and social interaction in various contexts (DSM-5; APA, 2013). The fact that the diagnostic criteria of ASD emphasize the need for the presence of the symptomatology in various contexts, makes it necessary that, in order to make the diagnosis, an evaluation be carried out by different informants who relate to the individuals with ASD in different contexts, the most common cases being evaluation by family and teachers. On many occasions, the results of these evaluations, based on the information provided by families and teachers about the same student, show notable differences (De Los Reyes, 2011). In fact, numerous studies have shown that the levels of correlation between the evaluations performed by different informants are usually moderate to low (Jepsen, Gray, & Taffe, 2012; Kanne, Abbacchi, & Constantino, 2009; Mattila et al., 2009). These differences in the assessment of students with ASD could be attributed to factors such as measurement error, possible differences in the informants' interpretations of the questions, the evaluator's expectations, the frequency of the informants' interaction with the person with ASD, or differences in the structure of the environment, such as the school setting (structured) versus the home environment (unstructured) (Achenbach, 2011). Although multi-informant assessment has been widely studied in the case of the population with mental health problems (see meta-analysis of De Los Reyes et al., 2015), in the case of ASD, to date, there has only been one meta-analysis. It included 49 studies, in which the possible agreement in the assessment of emotional, behavioral, and social skills problems in children and youths not only with a diagnosis of ASD, but also with intellectual disability was reviewed quantitatively (Stratis & Lecavalier, 2015). The results of this meta-analysis show a moderate degree of agreement among