This mixed-method study evaluated the effects of a 12-week Motor Support Program (MSP) on the multidimensional development of children with autism aged 4-6. The program targeted motor skills, social skills, pre-academic abilities, sensory regulation, and autism-specific symptoms. A total of 30 children diagnosed with autism from four special education and rehabilitation centers in Istanbul were randomly assigned to experimental (n = 15) and control (n = 15) groups. Quantitative data were collected using a pretest-posttest control group design: motor skills were measured with BOT-2, social skills with SSRS-PTF, pre-academic skills with PASAF, autism symptoms with the Adapted Autism Behavior Checklist, and sensory processing with the Sensory Profile. Qualitative data were obtained through semi-structured focus group interviews with parents, each lasting approximately 30 minutes. The interview questions were developed by the researchers and finalized based on expert feedback.

This study aims to evaluate the effects of the Motor Support Program applied to autistic children aged 4-6 years on motor skills, social skills, pre-academic skills, sensory regulation and autism-specific symptoms from a multidimensional and holistic perspective. In this respect, the study aims to contribute to the limited literature on the subject by addressing these developmental areas within the same intervention program and to provide a scientific basis for the planning of motor support programs as an alternative application in preschool education programs for autistic children.

This study was designed with a mixed method approach. Mixed method is an approach that aims to address research problems in a more in-depth and multidimensional way by combining the strengths of quantitative and qualitative research traditions. In the quantitative dimension of the study, the effects of the motor support program (MSP) applied to children with autism on motor skills, social skills, pre-academic skills, sensory profile and autism symptoms were evaluated with a pretest-posttest control group design. Qualitative data were collected through focus group interviews with parents, and family observations were analyzed in accordance with Braun and Clarke's (2006) thematic analysis process. Interviews were analyzed with open codes and themes were created according to content similarities.

The participants of the study consisted of a total of 30 children between the ages of 4-6 years diagnosed with autism attending four different special education and rehabilitation centers in Istanbul. This number of participants, determined as a result of the G*Power analysis, was assigned equally to the experimental (n = 15) and control (n = 15) groups by random number generation method using Excel software. All participants were included in the study with the written consent of their parents, who were informed about the conditions of participation in the study. The inclusion criteria were that the participants were between the ages of 4 and 6, had been diagnosed with autism, had not participated in any MSP before, did not have a health problem that would constitute an obstacle to MSP implementation, and did not have secondary diagnoses such as visual or hearing impairment. The exclusion criteria included the detection of a health problem that prevented children in the experimental group from participating in the MSP, the participants in the experimental or control group not participating in the assessment tests, or voluntarily leaving the training or measurement process.

The Bruininks-Oseretsky Motor Competence Test-2 (BOT-2) was used to assess motor skills and took approximately 10-15 minutes for each child. The Pre-Academic Skills Assessment Form (PASAF), which was used to measure pre-academic skills, was administered in approximately 10-15 minutes. In the assessment of social skills, the Social Skills Assessment System Preschool Teacher Form (SSRS-PTF) was completed by the children's special education teachers in approximately 10 minutes for each child. The Adapted Autism Behavior Checklist, which was administered through face-to-face interviews with parents to determine the level of autism symptoms, took approximately 25-30 minutes for each child. Also, the interview questions used for the qualitative component were developed by the researchers and finalized following expert review. The data were collected through semi-structured interviews lasting approximately 30 minutes.

During the teaching sessions of the MSP in the implementation process, teaching strategies that are sensitive to the learning needs of autistic children were used. Pedagogical approaches such as structured instruction supported by activity charts and visual cues, guidance with clear and short instructions, allowing the child to make choices, providing concrete experiences and modeling were taken as basis. In this way, progress was made in the teaching process of each skill area with methods that were sensitive to individual differences and proven to be effective. At the end of each session, the child's interest and performance in the activities were evaluated with observation forms and these evaluations formed the basis for planning the next training sessions.The program was implemented by the researchers in the special education and rehabilitation centers where the children were studying. The implementation process lasted a total of 12 weeks, two days a week, 50 minutes a day. In line with the pre-test results, 30% (15 minutes) of the sessions were allocated to individual activities and 70% (35 minutes) to group activities that enabled children to interact, taking into account the areas that each child needed to be supported individually. Thus, in each session, both individualized support was provided and group activities that emphasized social interaction were intensively implemented. MSP implementations were carried out in the presence of the research team and eight special education teachers working in the institutions where the children attended. Each child was individually supported by at least one special education teacher during the implementation.The activities were structured in line with the motor development goals and physical activity outcomes of the preschool period. The implementation sessions have a four-stage structure: Warm-up phase: Consists of rhythmic warm-up movements such as walking, running, jumping (5 minutes); Preparation phase: Physical preparation for the target skills is provided with functional exercises that improve joint mobility and flexibility (5 minutes); Main activity phase: Consists of individual and group activities based on basic movement skills, supporting motor, social and pre-academic skills (35 minutes); and End phase: The session ends with games played with the participation of the whole group, reinforcing target skills and increasing social interaction (5 minutes).

Inclusion Criteria:

• Participants were between the ages of 4 and 6.
• Had been diagnosed with autism.
• Had not participated in any Motor Skills Program (MSP) before.
• Did not have any health problems that would prevent MSP implementation.
• Did not have secondary diagnoses, such as visual or hearing impairment.

Exclusion Criteria:

• Detection of a health problem that prevented children in the experimental group from participating in the MSP.
• Non-participation in the assessment tests by participants in either the experimental or control group.
• Voluntary withdrawal from the training or measurement process.