Educational interventions used to improve the cognitive and social development of children and adolescents with autism

Difficulty in communication and socialization are the main characteristics presented by individuals diagnosed with autism. For children and adolescents with autism to have a better inclusion and understanding of the contents covered in the classroom, several methodologies have been developed and used that include active ASD teaching and learning strategies. Therefore, this study aimed to carry out a systematic review to verify which educational interventions have been used to improve the cognitive and social development of children and adolescents diagnosed with autism. For this reason, a search for scientific articles published between the years 2015 and 2020 was carried out in the Scielo, PubMed, Lilacs, Bireme, and Medline databases. The research included only studies that aimed at social and educational interventions for children and adolescents (2 to 18 years old) with autism. In the bibliographic survey, 227 articles were found. From the application of inclusion and exclusion criteria, 16 articles were evaluated in this systematic review. The studies addressed educational strategies that explored various aspects related to vision, hearing, smell, language, and sociability. The use of technological resources (applications, virtual games, video modeling, and robots) stimulated the cognitive and social development of the evaluated population. The results Research, Society and Development, v. 10, n. 9, e25710917971, 2021 (CC BY 4.0) | ISSN 2525-3409 | DOI: http://dx.doi.org/10.33448/rsd-v10i9.17971 2 presented were favorable for the increase, mainly, in the frequency of non-verbal initiatives and the use of eye contact in responses to communication partners.


Introduction
The term psychiatric or mental disorder is used to characterize people who suffer from conditions of abnormality or impairment of a psychological, mental, or cognitive nature (Dos Santos et al., 2020). According to the Brazilian Psychiatric Association (ABP, 2021), mental disorders are the second most frequent reason for emergency care, representing a challenge for health systems, particularly in low-developed countries.
Autism Spectrum Disorder (ASD), considered one of the psychiatric or mental disorders, is characterized by an early onset neurological development disorder, impairment of social and communication skills. ASD covers autistic disorder (autism), Rett syndrome, Asperger's disorder, childhood disintegrative disorder, and pervasive developmental disorder not otherwise specified (Monteiro et al., 2020). ASD has a multifactorial cause, that is, genetic and environmental factors are involved. Eshraghi et al. (2018) and Frye et al. (2019) showed that alterations in molecular and biochemical biomarkers, as well as epigenetic alterations, can trigger ASD.
Individuals with autism may exhibit hyperactivity, impulsivity, aggressive behaviors, peculiar sensory and perceptual responses (exaggerated fear of harmless stimuli or fascination with visual stimuli, sleep and gastrointestinal disturbances, and epilepsy) (DSM-IV-TR, APA 2000; Frye et al. al., 2019). In the case of children with autistic disorder, the main characteristics are repulsion in interpersonal relationships, acquisition delays, speech development disorders, motor difficulties, repetitive and stereotyped behaviors. Studies show that in the early stages of life, children and adolescents with ASD have a lower quality of life than children and adolescents with normal development (Kuhlthau et al., 2010;Arias et al., 2018).
In 2001, the National Research Council of the National Academies defined education for individuals with ASD as promoting the acquisition of skills or knowledge, including socialization; adaptive skills; language and communication; academic learning, and reduction of challenging behaviors, to increase functional independence, improve quality of life and alleviate family stress (Sengupta et al. 2015). In 2014, people with ASD gained legal support in terms of access to various services to which they are fully entitled. Law 12,764/2012 was regulated by Presidential Decree 8,368/2014 and guaranteed the qualification and accessibility to public services of the Unified Health System (SUS), education, and social protection for people with ASD.
Even after the implementation of Law 12,764/2012, efforts by schools and institutions, Biggs and Carter (2016) showed that family perceptions (classifications) about the quality of life of sons and daughters with autism were significantly lower than the rankings from a normative sample of young people of similar ages in the areas of social and educational support; physical and psychological well-being. In the educational sphere, individuals with ASD are disadvantaged by the educational system from the beginning of life (Jury et al. 2021).
For individuals with autism to have a better inclusion and understanding of the content covered in the classroom, institutions, and schools use several behavioral, developmental, and visual strategies. Behavioral strategies promote the learning of new behaviors. Educators/instructors promote and repeat such behavior until the child with autism successfully acquires it (Buemo et al., 2019).
A developmental strategy is a child-only approach. Thus, it uses materials and activities that are related to its development, for example, toys, games, among others. According to the interest on the part of students with ASD for these materials, the educator can direct ASD teaching towards verbal or manual strategies, focusing mainly on perception, communication, and language. The visual strategy can include the use of image and environmental enrichment (chairs, cubicles, boxes, landscape, among others). This strategy is focused on developing independence as well as skills, which facilitate group activities (Sengupta et al. 2015).
The improvement of the quality of life, such as the social and educational inclusion of the autistic person, helps in their development. However, the social and educational inclusion of autistic people is still a problem for society as a whole, as shown above. Based on this information, this study aimed to carry out a systematic review to verify which educational interventions have been used to improve the cognitive and social development of children and adolescents diagnosed with autism.

Methodology
This study is a systematic literature review developed following the guidelines of the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) (Page et al., 2021). The studies were selected according to these criteria: population, interventions, comparators, outcome(s) of interest, and study design (PICO), as described in Table 1. The selected studies were cohort, randomized clinical trials, controlled studies before and after, retrospective comparative studies, and prospective comparative studies. The searches were performed from April 1st to 26th, 2021. The following search terms were used: "Autistic Spectrum Disorder", "Intervention" "Strategies", "Interpersonal Relations", "Behavioral Syndrome", "Inclusive Education", "Child", and "Autism". These terms were selected from the Health Science Descriptors (DeCS) and used in a randomized manner (AND/OR). The literature search was conducted through the following databases: SciELO, PubMed, LILACS, Bireme, and MEDLINE. As inclusion criteria, the following were established: 1) original studies with a population aged 2 to 18 years with autism; 2) studies aimed at providing specialized educational care for people with autism; 3) studies aimed at social and educational interventions for people with autism; 4) original research that provided sufficient detail about methods and results, allowing the identification and aggregation of data and results; 5) studies published between 2015 and 2020 in English.
The exclusion criteria were: 1) research that investigated educational interventions and social inclusion in people over 18 years of age with autism. 2) studies that were published in case report formats; scientific abstracts; academic posters; narrative, integrative or systematic literature review; dissertations, and theses. The studies found were sent to a bibliographic reference manager and duplicates were removed.
In the first step, two authors (ALS and DBSS) evaluated the title and abstract to verify the inclusion and exclusion criteria. The selected studies were evaluated by three other authors (ALS, IOFM, and SAMN), through the full reading of the text. The articles returned based on the selected criteria were analyzed for quality using the methodology of PEDro scales, based on the Delphi list (Beaton, et al., 2002). Data extracted from selected studies were: Country/place where the study was conducted; study design; the age of the population studied; description of the intervention and duration; assessment tools and outcome measures.

Results
Through the search process about the scientific productions extracted through the databases, 227 articles were found.
Considering the screening and eligibility through inclusion and exclusion descriptions, 16 articles were selected to structure the body of this systematic study, which represented an approximate percentage of 7.05% of the initial survey ( Figure 1). Tables 2   and 3 show the general characteristics, interventions performed, and results obtained from all studies included in this systematic review. Research, Society and Development, v. 10, n. 9, e25710917971, 2021 (CC BY 4.0) | ISSN 2525-3409 | DOI: http://dx.doi.org/10.33448/rsd-v10i9.17971 6 Table 2. General characteristics (country, experimental design, sample size, age, and duration of intervention) of all studies included in this systematic review.
Source: Authors. Intervention based on the analysis of behavior during a multiplayer game.
Increase and maintenance of social interaction both in the virtual and physical environment. Thirumanickam, et al., 2018 Application of the Peabody Image Vocabulary Test (PPVT-4B); vocabulary system built into Proloquo2Go; video modeling (VM); self-modeling video (VSM); Robust-Improvement Rate Difference (R-IRD).
Intervention based on the use of videos.
It was found that the incorporation of video-based modeling can culminate in the promotion of skills involving conversation in individuals with Autistic Spectrum Disorder (ASD), stimulating social interaction. The behavior of children with Autistic Spectrum Disorder during the recess period was evaluated using a timed interval behavior coding system in an inclusive school setting.
There was an improvement in social engagement, social interactions in total, success in starting them, and opportunities to respond to a social approach from a classmate. articles had a sample smaller than 30 participants. Still, about these data, the youngest and oldest age groups in the sample were, respectively, 4 and 18 years old, with an average of 11 years old. Most articles, 75%, did not clearly (and sometimes completely) show the duration of the intervention. Table 3 shows that there was not a single predominant assessment tool used by the authors (the majority used more than one type of assessment). The most used assessment tools were: CARS, CARS-2, VABS-II, VB-MAPP, and PPVT-IV (12.5%). Intervention methods also varied a lot between articles, 31.25% of them used games and games with children, 37.5% used new ASD teaching methods not related to games, and 56.25% adhered to the use of technologies (robots, software, videos, applications, electronic games, and recordings). It is also worth mentioning that 100% of the articles determined or confirmed a method capable of developing the socio-cognitive and/or learning skills of infants with ASD. Therefore, educational interventions were focused on children and adolescents between 2 and 18 months with autism spectrum disorder (ASD) results were satisfactory, stimuli social life and knowledge process.

Discussion
The purpose of this study was to select and analyze the main methods of educational intervention involving children and adolescents (2 to 18 years old) with autism. Of the studies evaluated, ten of them evaluated people between 4 and 10 years old. Early childhood (zero to 6 years) is a period of development marked by greater brain plasticity (Carson et al., 2017), so it is a time when affective bonds with family members (mainly), development, and learning are more obvious. Such experiences can further affect physical, cognitive, emotional, and social development (Leahy Warren, 2005). During early childhood, it is possible to diagnose autism at an average age of 2 years. The main damages are social and communication. Therefore, the treatment initiated in primary infants could contribute to cognitive, social, and linguistic development (Stone and Tunner, 2005) Second childhood (6 to 10 years old) is one of the stages of child development with the greatest conflict between children and parents and/or guardians, including school educators themselves. In this sense, affection pedagogy is one of the methodologies adopted by educational institutions to assist in the formation of students' emotional intelligence (Silva and Santos, 2020). Thirumanickam, et al. (2018) evaluated adolescents with autism between 11 and 18 years old. During adolescence/puberty, 10 to 18 years of age, affection conflict is still imminent, and socio-emotional maturation marks the end of this cycle (Burnett et al., 2011). Considering the autistic student, the optimization of learning with playful or technological interventions is proven to be efficient to ensure the cognitive and social development of these children and adolescents (Westeryeld et al., 2017;Sam et al, 2020;Locke et al, 2016;Fantasia et al, 2020).
One of the limitations was that nine studies used a sample of less than 10 people and the most of the studies evaluated The analysis of the results of the selected articles showed the use of different methods to promote development (Table  3). The use of such methods obtained satisfactory results. All authors concluded that through their respective applied interventions it was possible to achieve success in the development of children and adolescents with autism.
Some of the methods used in the studies explored various aspects related to vision, hearing, smell, language, and sociability to reach a higher level of psychological, social, and cognitive development. Visual and audiovisual stimuli can produce communication in mute children, directing behavior (Cardoso et al., 2021;Orrú, 2011). Leão et al (2019) showed that the intervention anchored in the self-regulation of learning in the context of Specialized Educational Service (AEE), considering the context and in the classroom, contributed to improving the communication of three autistic children (10 to 12 years old). The results favored the increase in the frequency of non-verbal initiatives and the use of eye contact in responses to communication partners in the AEE.
The use of technological resources has become increasingly frequent in education (Silva, 2016). Technologies collaborate for the application of olfactive ASD teaching methodologies, in which the child and adolescent participate in the entire process, being able to develop cognitive, sensory, and interactional capacities. Most technological resources provide visual stimulation, and this feature is what makes it attractive for students with autism. In this sense, educators using these resources can expand and provide learning, cognitive and social-emotional development of autistic students. In addition, the results of the evaluated studies showed that learning in the classroom through the use of computers, virtual games, among others, were applied in the family and daily environment of the population evaluated with autism, improving social interaction and the quality of Your lives. Fantasia et al (2020) assessed the potential of active control to improve learning in children aged 6 to 12 years diagnosed with an autism spectrum disorder. Participants were presented with a memory game available on a touchscreen tablet, in which children were asked to remember as much as possible of the objects presented. For half of the objects, children could decide the order and pace of the study (active condition); for the other half, they passively observed the study decisions of a previous participant (yoke condition). The results showed that recognition memory was more accurate when children could actively control the order, pace, and frequency of the study experience. Thirumanickam, et al. (2018) evaluated four adolescents with autism between 11 and 18 years old. The study compared the effectiveness of packaged video modelling and video self-modelling interventions to develop conversational behaviors. Although the sample number was small, the results demonstrated that, overall, video-based modelling used in conjunction with a system of least prompts was effective in promoting conversation skills in adolescents with autism.
Therefore, the development and use of new/innovative educational methods for the development of children and adolescents with autism is fundamental to the educational and social inclusion of this population.

Conclusion
Based on the choice and papers reviews, an improvement in the socio-cognitive development of children and adolescents were observed. In this sense, several educational techniques and equipment were used to promote this result, from playful games to the use of humanoid robots, culminating in the reduction of social and educational barriers often caused by autism spectrum disorder. One of the limitations was that the studies used a small sample number and the most then were performed in countries with a highest index of social and economic development, therefore, the results obtained may not be comparable in societies with lowest index of economic development. Thus, these results allowed us to conclude that: 1) it is possible to stimulate the cognitive development in children and adolescents with autism (2 to 18 years old) using several educational techniques and technologies, enabling a healthier social interaction and greater ease of learning; 2) there is scarcity of studies assessing the effectiveness of educational interventions to improve cognitive and social ability of children and adolescents with autism in countries with lowest index of economic development.