What Is Task Interspersal in ABA?

Describe the task interspersal ABA plan

List the maintenance tasks, acquisition tasks, order rule, planned ratio, prompts, response windows, consequences, supports, session length, and reason for mixing. A label such as easy or known needs recent task-specific evidence.

Expect procedural variation

A survey of 117 direct-care providers found 98 reported using task interspersal, with wide variation in ratios, task domains, and reinforcement arrangements. The survey describes practice patterns rather than demonstrating which version fits an individual.

Avoid a guaranteed-learning claim

In a five-child object-label experiment, constant practice was similar to or better than interspersal in the first experiment, and later exploratory effects depended on reinforcement arrangements. Receptive-language guidance also calls for more comparative research.

Keep choice and communication active

The Ethics Code addresses client involvement, assent when applicable, assessment, risk, and evaluation. ASHA supports continuous AAC access. A task mix should preserve an accessible pause, help, correction, and stop route.

A practical example

Nia practices two new kitchen labels among four maintained sorting responses. Across six sessions, new-label accuracy rises from 2/10 to 6/10, while maintained sorting stays at 23/24. Nia selects shorter sessions twice. The team reports acquisition, maintenance, choice, prompts, and time separately.

Questions families can use

Which tasks are truly maintained? Why are they mixed? What ratio is used? Are consequences equal or different? How much session time goes to each goal? Which result would support keeping or changing the arrangement?