A tracking procedure for determining the cat's frequency discrimination.
Add a quick light-cued time-out after each response to speed up auditory discrimination in animal operant tasks.
01Research in Context
What this study did
Researchers taught cats to tell two tones apart.
The cats pressed a bar for food on a variable-ratio schedule.
After each press a short time-out and a light flash were added.
This mix helped the cats finally learn which tone meant food.
What they found
The cats mastered the tone difference once time-outs and lights were in place.
Training took longer than older shock-avoidance methods, but it worked.
The study showed you can track tiny auditory changes with steady bar pressing.
How this fits with other research
Dove et al. (1974) got the same kind of stimulus control in pigeons, but they used heart-rate jumps instead of bar presses.
Osugi et al. (2011) pushed the idea further by mapping exact hearing ranges in possums with a changing-criterion design.
de Villiers (1980) used the same free-operant tracking trick for time instead of sound, proving the method works across different dimensions.
Why it matters
If you run animal labs, pair the target sound with a brief light-cued time-out.
This simple add-on sharpens discrimination without shock or tight trial clocks.
Try it next time a subject stalls; the pause gives the brain a clear marker.
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02At a glance
03Original abstract
A tracking procedure was used to investigate the time required to train cats to discriminate between a frequency-modulated tone and a steady tone. The animal was reinforced with food on a VR schedule only when the steady tone was present and the animal pressed the correct bar (one of two). After reinforcement, the steady tone usually changed to a frequency-modulated signal; by pressing the other bar, the tone could be changed to its steady state and the reinforcement then obtained as before. A major difficulty was the lack of control by the auditory stimulus on the cat's responses. This problem was solved by introducing interpress time outs which forced the animal to hesitate after every press. The use of light cues to signal the time outs and the correct bar to press accelerated the rate at which the training progressed. With cats, this conditioning procedure apparently requires a much longer training period before the actual threshold determinations than the more commonly used avoidance conditioning procedures. However, when animals are to be tested repeatedly over a period of several months or longer, the procedure may prove the more desirable one because it reduces experimental neurosis.
Journal of the experimental analysis of behavior, 1962 · doi:10.1901/jeab.1962.5-323