Electroencephalographic correlates of temporally spaced responding and avoidance behavior.
Lever pressing can look very different under DRL and avoidance, yet EEG only picks up general alertness, not the schedule itself.
01Research in Context
What this study did
Scientists wired rabbits to an EEG while they pressed a lever.
The rabbits worked on two schedules: DRL 20 s (wait 20 s between presses) and shock avoidance (press to stop shocks).
The team gave amphetamine to see if the drug changed the brain waves tied to each schedule.
What they found
The rabbits pressed at very different speeds on DRL versus avoidance, but their EEG pictures looked the same.
Amphetamine messed up the slow DRL performance, yet it only shifted overall brain arousal; it did not create schedule-specific EEG marks.
Brain waves tracked how alert the animal was, not which schedule was running.
How this fits with other research
Zhou et al. (2018) later showed that full-session DRL alone cuts severe problem behavior in kids with ID/DD. Their work proves the schedule still matters for behavior, even if EEG stays flat.
LeFrancois et al. (1993) found that rats’ response rates echoed only the schedule that came right before testing. Like ROSS et al. (1962), they show that past contingencies shape behavior more than they shape underlying brain state.
Rieth et al. (2022) looked at autistic children doing executive-function training. EEG change in that study did predict behavior change, seeming to clash with the rabbit finding. The gap makes sense: R et al. measured long-term learning across weeks, while S et al. watched moment-to-moment schedule control. Different time scales, different EEG stories.
Why it matters
For BCBAs, this means the EEG buzz you see in an assessment probably shows general arousal, not the fine print of the contingency you just programmed. Use behavior data, not brain waves, to judge if your DRL or avoidance intervention is working. If you team up with neuroscientists, push them to look past simple EEG labels and tie changes to real-world behavior over days, not seconds.
Want CEUs on This Topic?
The ABA Clubhouse has 60+ free CEUs — live every Wednesday. Ethics, supervision & clinical topics.
Join Free →Run your DRL session as usual and trust your response-rate graph; skip the urge to tweak the plan just because an EEG trace looks ‘too active.’
02At a glance
03Original abstract
This study was undertaken to determine whether any EEG changes occurred during a multiple schedule of reinforcement consisting of repeated periods of avoidance behavior, a time-out (TO) period, and a period of differential reinforcement of low rates (DRL). The two monkeys were permanently implanted with bipolar electrodes in various subcortical areas. The EEG was recorded from these electrodes for several weeks before any behavioral training was undertaken. Training was then begun in the multiple schedule, and EEG recordings were taken frequently throughout the training period. When a stable performance level was achieved, drugs (dl-amphetamine and sodium pentobarbital) were introduced which disrupted the DRL performance but had little or no effect on avoidance behavior. The EEG recordings continued throughout these drug studies. The data indicate that the marked behavioral differences noted in each component of the schedule were not reflected in the EEG. However, the EEG did correlate with the general level of alertness of the animals during the various components. The drugs which differentially affected the behavior in the components of the schedule did not differentially affect the EEG, but they did change the brain-wave activity equally in all components. Finally, EEG changes correlated with the complex motor response of lever pressing were not observed.
Journal of the experimental analysis of behavior, 1962 · doi:10.1901/jeab.1962.5-467