Optimizing task‐analysis instruction: Effects of descriptions and pictures of antecedent stimuli and outcomes
Add photos of the setup and the finished product to any task analysis to help learners get complex chains right the first time.
01Research in Context
What this study did
Tyner et al. (2024) asked college students to learn a 22-step graphing chain.
Each student got a task analysis that varied what was pictured or described.
Some sheets showed only the step. Others added photos of the antecedent stimuli or the final outcome.
The team then scored how accurately each student built the graph.
What they found
Pictures plus short descriptions of antecedent stimuli raised accuracy.
Adding outcome photos gave another small boost.
The richest task analysis won: antecedent pictures, antecedent text, and outcome pictures together.
How this fits with other research
Ortega et al. (2026) extends this idea to yoga. Adults used a picture task analysis and self-scored each pose. Skills improved without a live coach, showing the method works for self-management too.
McMillan et al. (1999) is an early cousin. They used computer pictures to prompt adults with severe ID through daily tasks. Both studies find that photos make the chain clearer, even across very different learners.
Lewis et al. (2025) looks like a contradiction at first. They warn that pictures can pull attention away from text for kids with reading deficits. The difference: Lewis taught reading, Tyner taught graphing. When the goal is a motor chain, pictures help; when the goal is textual control, extra pictures can compete.
Why it matters
If you write task analyses for staff or clients, add a quick photo of what the materials should look like before the step and what the finished product should look like. This small edit can cut errors on data sheets, graphing, or assembly tasks without extra teaching time.
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02At a glance
03Original abstract
Little research has examined specific instructional variables that influence the development and effectiveness of task-analysis instruction. We conducted two experiments using text-based task analyses to teach college students to create single-subject reversal design graphs. In Experiment 1, we tested the effects of presenting antecedent and outcome stimuli on graphing performance (accuracy, yield, time to completion). Different groups of participants experienced graphing tutorials with descriptions and pictures of (a) responses; (b) antecedent stimuli and responses; (c) responses and outcomes of correct responses; and (d) antecedent stimuli, responses, and outcomes. In Experiment 2, we compared tutorials with and without pictures. Collectively, the results suggest that graphing accuracy was positively affected by task analyses that included pictures and descriptions of antecedent stimuli and that adding outcome stimuli further benefited graphing accuracy. These results suggest critical instructional elements that should be included in future task analyses of graphing or other complex behavior chains.
Journal of Applied Behavior Analysis, 2024 · doi:10.1002/jaba.2904