A comparison of signaled and unsignaled delay of reinforcement.
A simple signal during a reinforcement delay keeps behavior strong, whether you work with pigeons, preschoolers, or clients in clinic.
01Research in Context
What this study did
Richards (1981) worked with pigeons that pecked a key for food.
He compared two kinds of 5- or 10-second delays.
In one, a red light stayed on during the wait. In the other, nothing signaled the wait.
What they found
The red light saved response rates. Birds pecked almost normally when the delay was signaled.
Without the signal, the same 5- to 10-second wait slashed pecking.
A tiny unsignaled wait actually sped some birds up, but longer waits hurt only when they were silent.
How this fits with other research
Corrigan et al. (1998) later showed why unsignaled delays hurt: birds stared at the food hopper instead of pecking.
Reichle et al. (2010) moved the idea to children. Preschoolers with autism worked harder when teachers used explicit cues like “three more tasks” before a delayed treat.
Byrne et al. (2017) flipped the coin to punishment. Rats given a delayed timeout stopped pressing more when the delay was signaled, the same shielding effect W saw with food.
Why it matters
If you must delay reinforcement, give a clear cue. A timer, a count, or a colored card tells the learner the wait is part of the plan. Without that signal, the delay feels like extinction and behavior drops. Use signaled delays to stretch work time without losing momentum.
Want CEUs on This Topic?
The ABA Clubhouse has 60+ free CEUs — live every Wednesday. Ethics, supervision & clinical topics.
Join Free →Put a visual timer on the table and say, “When the red is gone, you get your iPad,” then watch engagement hold steady while you fade the delay.
02At a glance
03Original abstract
Pigeons were trained on either a variable-interval 60-second schedule, or on a schedule that differentially reinforced responses that were spaced at least 20 seconds apart. The birds were then exposed to several durations of reinforcement delay, with comparisons between signaled and unsignaled delays. Although unsignaled delays of 5 and 10 seconds produced large decreases in response rate, signaled delays of up to 10 seconds produced only moderate decreases in response rates. In addition, some subjects responded more rapidly with a .5 or 1.0 second duration of unsignaled delay than with immediate reinforcement. These response rate changes occurred regardless of whether the rate of reinforcement concomitantly decreased or increased.
Journal of the experimental analysis of behavior, 1981 · doi:10.1901/jeab.1981.35-145