Background and purposes: Assessment of the motor and sensory integrative functions (MSI) is a key component of an overall health and functional evaluation for school-aged children with intellectual disabilities (ID). The ability of students with ID to perform age-appropriate motor tasks and adaptive behaviors (end product of sensory integration) can help determine the long-term effects of special education curriculum/interventions and the quality of an overall school-based rehabilitation program.

However, several challenges exist in measuring MSI for school-aged children with ID. First, most measures of MSI vary in content (domains), causing difficulty in the selection of relevant MSI measures. Second, most measures of MSI lack robust evidence of psychometric properties (e.g., reliability and responsiveness). Third, the minimal important difference (MID) and minimal detectable change (MDC) of most MSI measures for ID are largely unknown, which limits the interpretation of change scores in schools and clinical settings. Fourth, most MSI measures are time-consuming to administer, placing a burden of administration on both teachers/therapists and children. Finally, all the measures were developed in western countries and their use has not yet been validated for ID populations in Taiwan. An efficient and in-depth understanding of the students' motor and sensory integrative functions can help the school teachers implementing appropriate curriculum, monitoring the progress, managing the classroom, and further enhancing the overall learning for school-aged students with ID. A validated and convenient computerized testing system is urgently needed.

The Rasch model is useful in developing precise measures. Furthermore, a computerized adaptive testing (CAT) system can provide efficient measurements. Therefore, in this 3-year project, the investigators will develop a mobile APP testing system for assessing Motor and Sensory Integrative Functions in School-aged Children with Intellectual Disabilities (MSI-ID) to overcome the aforementioned challenges. The investigators will determine whether the MSI-ID is efficient and psychometrically robust. In our previous research (109WFD2110353), the investigators have established the item banks for 3 core domains of MSI (i.e., gross motor, fine motor, and sensory integration) and completed administering on 100 school-aged children with various levels of ID severity and age.

Method: In the first year, the investigators will examine the model fitting of the established items and calibrate the item characteristics with Rasch modeling. Then, the MSI-ID (a tablet personal computer version) will be developed. The investigators will perform a simulation study to determine the performance (e.g., efficiency) of the MSI-ID. In the second year, the investigators will validate the MSI-ID. The tablet MSI-ID will be administered on 150 school-aged children with ID to validate its efficiency (i.e., feasibility and administration time) and psychometric properties (including reliability, validity, responsiveness, and minimal detectable change). A MSI-ID APP will be developed to facilitate the accessibility and utility and the testing system.