This study investigated the effects of a sensory diet intervention program on five children with a sensory processing disorder. The effect was investigated on children's sensory processing skills, psychosocial skills, and classroom engagement.

Sensory diets are one of the interventions occupational therapists use in school-based settings to manage manifestations of sensory processing disorder. However, very few studies have investigated the effectiveness of sensory diets, and the results of these studies were mixed. Past studies also had methodological limitations. Therefore, this study investigated the effect of sensory diets on children's sensory processing skills, psychosocial skills, and engagement in classroom activities. This study used a single-subject ABCA design. Five children between the ages of five and eleven years participated in the study. The study consisted of an initial baseline phase A1, the control intervention phase B, sensory diets intervention phase C, and the second baseline phase A2. Each phase lasted for seven days. The PI videotaped each participant for fifteen minutes each school day during all phases to collect the data. The participants were videotaped during classroom group activities. Visual analysis of the data showed that sensory diets had a positive effect on participants' sensory processing, psychosocial skills, and classroom engagement.

Inclusion Criteria:

- Children between the ages of four and eleven years and attending pre-kindergarten through fourth grade

• Children eligible for occupational therapy services under the special education eligibility criteria or under section 504 of the Rehabilitation Act of 1973-subpart D. This subpart of section 504 ensures children with disabilities who do not meet the eligibility criteria for special education services and are placed in general education classrooms receive the necessary support and related services (such as occupational therapy) to fully participate in general education classrooms.
• Children who scored in the Definite Difference range (+ 2 SD) or Probable Difference (+ 1 SD) ranges on two or more sections or quadrants on the Sensory Profile-2, Teacher Questionnaire (SP-2 Teacher Questionnaire; Dunn, 2015) were included in this study

Exclusion Criteria:

Children with medical concerns, such as cardiac conditions, posing risk to participate in resistive (strenuous) gross motor activities or children who used mobility devices were excluded from the study as these conditions may have hindered their participation in sensory diet activities.

• Children who were on medications, such as stimulants, anti-anxiety or anti-convulsive medications were excluded from the study as these medications may influence the clinical representation of SPD and interfere with the study outcomes.
• Children who were currently receiving sensory diets or received sensory diets six months prior to the beginning of the study were excluded from the study to control for confounding.

Second observers were masked from participants' evaluation data and treatment phase