Introduction
Modern thinking on early intervention for children with developmental disorders places certain demands on it. If we consider early intervention as one of the variants of psychological and social practices, then an important requirement for it is the presence of empirical evidence of its effectiveness, which should be obtained through scientific research and presented to the professional community in the form of scientific publications [Busygina, 2020].
Such studies are of high practical value as they allow to evaluate a specific algorithm of the application of practice in a study and its effect. The very possibility of such an evaluation allows all interested parties to make a conclusion about whether a practically presented model of early intervention corresponds to the empirically proven algorithm or differs significantly from it. The presence of inconsistencies between the practically presented model and its original source can be the basis for a closer evaluation of the model and a decision to look for other available options.
Thus, the aim of this paper is to analyze the empirically proven algorithms of the early intervention model, the ESDM model.On the basis of numerous studies, the authors of the ESDM model conclude that a very important component of correctional work with a child with autism spectrum disorder (ASD) is the emotional inclusion of the child in the events around him/her, and an important declared goal is to help a child with ASD to develop his/her social interest. The necessity of interactive, emotionally rich interaction for the successful speech, social and cognitive development of the child is emphasized [Rogers, 2019, p. 32].
An important component of the ESDM model is the emphasis on developing relationships between the child and his/her close adults and on supporting these relationships, turning them into close and trusting ones [Rogers, 2019, p. 46], developing in parents such qualities as responsiveness, sensitivity, empathy, teaching them to understand the child’s signals for more productive interaction [3, p. 15—16].
The approach emphasizes the importance of the child’s own social initiative, their social inclusion and the encouragement of this initiative and inclusion on the part of adults [Rogers, 2019, p. 16].
The authors of the ESDM model are based on the approach to the development of interpersonal relationships in autism developed by Rogers and Pennington (1991) under the influence of Daniel Stern’s research. The main idea of this approach is that children with ASD have impaired imitation skills, resulting in difficulties with bodily adjustment to adults, with recognizing the feelings and moods of others, and with coordinating movements. The ESDM model pays great attention to the development of imitation in children, because, from their point of view, it is on the basis of this skill that young children develop social and communicative abilities [Rogers, 2019, p. 47]. The authors of the ESDM model consider their model to be quite close to approaches focused on emotional interaction, such as Mahoney and Perales’ “responsive intervention” method, RDI relationship development therapy (Gutstein, 2005) and the DIRFloortime approach [Rogers, 2019, p. 73].
The main goal of the approach is to support the development of the most important “social-emotional-communicative skills by creating an emotionally enriched relationship with a sensitive and responsive adult” [Rogers, 2019, p. 48].
The authors of the ESDM model are based on Dawson’s hypothesis that autism is based on impaired social motivation, which in turn leads to impaired sensitivity towards social rewards [3, p. 48]. To overcome these social deficits, the authors of the ESDM model suggest using Pivotal Response Training (PRT) Koegel [Koegel, 2006], from their point of view, this tool is able to increase the importance of social approval, to increase social attention, the motivation for social interaction. The ESDM model in the context of speech development is based on the assumption that verbal speech develops only after the child has mastered the ways of non-verbal communication [3, p. 51].
The distinctive features of the ESDM model are the use of sensory and social repetitive games as the main type of developmental activities with a focus on interpersonal interaction; teaching the child to imitate gestures and facial expressions; the development of both verbal and non-verbal forms of communication; attention towards the development of the cognitive aspects of play activities and co-operation with parents. An interdisciplinary team of specialists is working on an integrated curriculum [Rogers, 2019, p. 46].
In Russia, in the last 7 years, the ESDM approach has become increasingly popular, which is manifested in the fact that some of its variations are being introduced into the practice of state correctional care for children with ASD of early and preschool ages [Bronnikov, 2022; Khasanova, 2022; Yakusheva, 2022].
Materials and Methods
In connection with the stated circumstances, I set the task to evaluate the scientific and practical validity of the model of early ESDM assistance. The research methods used were the theoretical analyses of current research on the evaluation of the effectiveness of the ESDM model presented in scientific publications.
The selection and analysis of the results was performed according to the following criteria: the review included studies conducted within the so-called “gold standard” — randomized controlled trials; however, the presented analytical review used data from other studies with high practical relevance. The analysis was conducted using the following electronic resources: eLIBRARY.RU, CyberLeninka, PubMed, ResearchGate. In addition, print publications available in Russia devoted to the ESDM approach were reviewed.
Results
The ESDM approach was originally created by a group of researchers in the field of early development, which is reflected in quite a large number of scientific studies on the effectiveness of this model.
The study by Vismara et al. [Vismara, 2009] reported the results of a randomized controlled trial of a 12-week training program for non-verbal children with ASD using the ESDM model. The program involved 1 hour per week of individual therapy with the child and parent training. The results of the study stated that there were significant improvements in speech in the children of the experimental group [Koegel, 2006].
In a 2006 study, the Early Start Denver Model was compared to another early intervention model, PROMT therapy. The children who participated in the study were randomly divided into two groups, with one group implementing the Early Start Denver Model and the other group implementing PROMT therapy. Positive dynamics (80%) were observed in both groups: children mastered the ability to communicate their intentions using words and were able to spontaneously say words on their own initiative [Rogers, 2019, p. 66].
In 2009, Dawson and colleagues conducted a randomized controlled trial on a group of 48 children with autism (autistic disorder and pervasive developmental disorder) aged 18 to 30 months. Children with additional disorders were not included in the group. The group was divided into two subgroups according to IQ level (less than 55 points and greater than 55 points), each subgroup was divided randomly into two groups, which were later combined again into two groups, experimental and control, each containing an equal number of children with low and high IQ levels [Dawson, 2010].
The following scales were used as research methods: the Autism Diagnostic Interview-Revised (ADIR), the version for children under 5 years of age; the Autism Diagnostic Observation Schedule (ADOS); the Mullen Scales of Early Learning (MSEL); the Vineland Adaptive Behavior Scale (VABS); the Repetitive Behavior Scale (RBS).Thus, the ESDM Early Start Denver Model has a good evidence base in a high-intensity version of the program (15 hours per week) with parent coaching. In addition, there has been less definitive research on the effectiveness of a low-intensity ESDM program combined with parent coaching. It should be emphasized that in all studies, one or another version of parent training is mandatory. In the Russian-speaking space, although there are articles related to the topic of applying the Denver model, there are virtually no materials describing experimental studies that could claim the scientific evidence of this approach on a Russian-speaking sample.
Conclusions
To summarize the results of the analytical review, we can say that the ESDM model has a good evidence base, which is reflected in a large number of studies conducted with high methodological rigor, and can rightfully be considered an evidence-based practice of early intervention. In the Russian-speaking space, the effectiveness of the ESDM model has not been sufficiently studied, and this is an urgent task of scientific research practice in the near future.
For the ESDM model, the following experimentally proven algorithms can be distinguished:
— Creating a curriculum based on a list of key skills.
— Training (coaching) of parents from a certified ESDM therapist on a regular basis, from 1 to 4 hours per week.
— Parents using ESDM strategies with their children in everyday life situations on a regular basis.
— Conducting ESDM therapy in an individual format by specialists under the guidance of certified ESDM therapists for at least 15 hours per week.
— The duration of the intervention is about 2 years.
— Age at the initiation of ESDM therapy is from 18 to 30 months.
— ESDM therapy has been experimentally proven in children diagnosed with ASD who do not have concomitant neurological diseases, chronic somatic diseases and have an intelligence quotient (IQ) of at least 35 points on the visual perception and fine motor subscales of the Mullen Scales of Early Learning (MSEL).
Possible results from intervention based on the ESDM model if the above algorithms are followed:придать документу
— Reduction of the main symptoms of autism up to changing the diagnosis to a milder one.
— Reduced parental stress following a high-intensity intervention program.
— Improvement of receptive and expressive speech.
— Improvement in adaptive behavior, socialization, daily living skills, motor skills.
— Improved communication.
It can be concluded that the application of the ESDM model in a scientifically based version requires compliance with a fairly large number of conditions, including the level of the development of children, their age, parental participation, the intensity and duration of the intervention, and the level of competence of specialists. Specialists who recommend this option of assistance to parents of children with ASD should also clarify these algorithms for applying the ESDM model to them, which should help them navigate the variety of correctional services offered for children with ASD.