Evaluating the predictive validity of a single stimulus engagement preference assessment

Area of Science:

• Behavioral science
• Applied behavior analysis

Background:

• Preference assessments are crucial for identifying effective reinforcers.
• Traditional methods often involve direct choice between stimuli.
• Engagement duration is an emerging metric for preference evaluation.

Purpose of the Study:

• To evaluate the predictive validity of single stimulus engagement (SSE) preference assessments.
• To compare SSE with paired stimulus preference assessments.
• To determine the utility of SSE for individuals with specific challenges.

Main Methods:

• Four participants underwent SSE and paired stimulus preference assessments.
• Stimuli were presented individually for SSE, with engagement duration recorded.
• Reinforcer effectiveness was assessed using a concurrent-schedule procedure.

Main Results:

• SSE preference rankings aligned with paired assessment rankings for 2 out of 4 participants.
• Duration-based SSE rankings accurately predicted relative reinforcer effectiveness for all participants.
• SSE was quicker to administer but yielded less stable rankings than paired assessments.

Conclusions:

• Single stimulus engagement assessments effectively predict reinforcer effectiveness, even with varied preference ranking concordance.
• SSE is a valuable tool for individuals who struggle with stimulus selection or when stimuli are difficult to pair.
• The efficiency and applicability of SSE make it a promising alternative preference assessment method.