Usability of a touchscreen assessment tool (TATOO) prototype for clinicians and typically developing children

Area of Science:

• * Rehabilitation technology
• * Human-computer interaction
• * Pediatric occupational therapy

Background:

• * Touchscreen devices are integral to modern life and pediatric therapy.
• * Existing assessment tools may not capture essential touchscreen interaction skills.
• * The Touchscreen Assessment Tool (TATOO) was developed to address this gap.

Purpose of the Study:

• * To evaluate the usability of the TATOO application for occupational therapists and typically developing children.
• * To examine correlations between usability scores from clinicians and children.
• * To validate TATOO within a user-centered design framework.

Main Methods:

• * A convenience sample of 10 clinicians and 60 typically developing children (ages 4-10) participated.
• * Clinician usability was assessed using the System Usability Scale (SUS) and semi-structured interviews.
• * Child usability was evaluated using the Short Feedback Questionnaire-Child (SFQ-Child).

Main Results:

• * Clinicians rated TATOO's usability highly (SUS scores: 85.5 ± 8.04).
• * Children across all ages and tasks also reported very high usability.
• * No significant bias was found between clinician and child usability ratings.

Conclusions:

• * TATOO is a user-friendly and effective tool for assessing touchscreen interaction skills.
• * It offers an objective, low-cost solution for clinicians and researchers.
• * The study proposes a mixed-methods model for application development and usability evaluation.