The local organization of behavior: discrimination of and memory for simple behavioral patterns.
Pigeons remember their own just-reinforced response pattern for several seconds, proving reinforcement builds a short-lived memory trace.
01Research in Context
What this study did
Rider (1981) asked pigeons to peck a key in a certain rhythm. If the bird’s spacing matched the reinforced pattern, it got grain.
Right after the rhythm ended, the bird saw two lights. One light matched its own just-finished pattern. Pecking that light paid off. The test came after 0, 4, or 8 seconds of waiting.
What they found
The birds picked the correct light almost every time when the wait was zero. They still beat chance after eight seconds.
Memory faded faster when the two choices looked almost the same. Small timing differences were harder to hold onto.
How this fits with other research
Northup et al. (1991) used the same delayed-matching idea but tested where the bird pecked, not when. Their pigeons remembered the spot for twenty-four hours. The 1981 birds only held the rhythm for eight seconds. Same method, different content, very different lifespans.
Skrtic et al. (1982) showed that longer delays always hurt accuracy. The 1981 data line up: each extra second trimmed correct picks. Together they warn that even short gaps weaken memory for recent behavior.
Fetterman et al. (1989) pushed the idea further. They asked pigeons to recall which fixed-ratio they had just finished. Birds showed a “choose-small” bias under delay. Both studies prove pigeons can tag and recall their own recent responses, not just outside cues.
Why it matters
Your client just finished a successful chain. If you wait even a few seconds before the next cue, the smooth rhythm may slip out of memory. Re-state the response quickly or mark it with a distinctive signal to keep the pattern fresh. Short gaps matter more than we think.
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02At a glance
03Original abstract
A procedure was developed to enable nonverbal organisms to report what they remember of the temporal organization of their recent behavior. A baseline behavior with known temporal structure was established by a concurrent variable-interval variable-interval schedule for two temporal patterns of behavior (two different classes of reinforced inter-response times). The five pigeon subjects emitted these two temporal patterns on a center key and were occasionally given a short-term memory probe for their most-recently-emitted pattern. The probes consisted of symbolic delayed matching-to-sample tests, in which a response on a green side key was reinforced if the most recent pattern belonged to the shorter reinforced class, and a response to a red side key was reinforced if the most recent pattern belonged to the longer reinforced class. All subjects could report with over ninety percent accuracy what their most recently emitted behavioral pattern was when a retention interval separating the pattern from the memory probe was only .1 seconds. The retention interval was then manipulated, and it was found that recall for a pattern was frequently above chance after a delay of as much as eight seconds. Thus, pigeons can remember their most recent interresponse time not only right after it is emitted, but for several seconds thereafter. In other conditions, the patterns themselves were manipulated. It was found that as the patterns became more similar, discrimination became poorer. These results agree with the view that reinforcement tends to organize and integrate the local structure of behavior to the extent to which that structure is remembered.
Journal of the experimental analysis of behavior, 1981 · doi:10.1901/jeab.1981.36-303