Discriminated Functional Communication for Attention: Evaluating Fixed and Varied Durations of Reinforcer Availability

The team taught one learner to ask for attention only when attention was available.

First they used fixed windows: 30 s of attention always followed the mand.

Later they switched to varied, real-life timing to see if the skill would hold.

The learner mastered the rule “ask only when green” under the fixed schedule.

When the timing became random, the mand stayed accurate and problem behavior stayed low.

Starting fixed made the later, messy world easy to handle.

Leon et al. (2010) showed DFC works in everyday spots like story time; Balka adds the teaching order that makes it stick.

Greer et al. (2016) reviewed 25 kids and found clear S-delta cues keep thinning safe; Balka gives one clear cue—fixed duration—that does the job.

Ramirez et al. (2025) tried jumping straight to a lean 60 s/240 s schedule; most kids coped, but one needed a slower step. Balka’s fixed-first method is that slower, surer step.

You can stop attention mands from turning into problem behavior. Begin with a short, predictable attention window. After the learner wins five or six times, stretch and vary the timing. The skill survives the change and you avoid extinction bursts.