Computer-Based Reading Interventions with a Post-Secondary Student with Intellectual Disability: Self-Determined and Fixed Response Intervals

Working with a post-secondary student with intellectual disability, an adapted alternating treatments design was used to compare sight-word acquisition across three computer-delivered learning trial interventions: one with fixed 5-s response intervals, another with fixed 1-s response intervals, and a third with self-determined intervals. Visual analysis of session-series graphs suggest that all three interventions increased sight-word acquisition with the 5-s and self-determined interventions causing more steady and consistent learning per session than the 1-s intervention. Analysis of the time-series graph suggests that the self-determined intervention caused superior learning rates to the other interventions. From an applied perspective, the self-determined intervention is the most appropriate remedial procedure for this student because it resulted in the most rapid learning. Discussion focuses on the value of making relative-effectiveness decisions based on measures of learning as a function of time spent learning (learning speed) versus measures of learning as a function of sessions or trials.