Auditory word discriminations in the pigeon.
Pigeons can learn to sort human speech sounds with standard reinforcement, proving that basic auditory discrimination does not need a human brain.
01Research in Context
What this study did
Researchers asked if pigeons can tell spoken English words apart. Birds pecked one key when they heard "food" and another key when they heard "water."
Correct pecks earned grain. Wrong pecks turned the lights off for a few seconds. The team varied how fast the words came and how long each word lasted.
What they found
The pigeons scored 70-90 % correct on most tests. Shorter gaps between words and longer words made the job easier.
Even with new voices and slightly different recordings, the birds still picked the right key.
How this fits with other research
Palya (1985) went one step further. That lab taught pigeons to act like speakers: the birds learned to peck colors when they heard the color name (a tact) and to peck for grain when they heard "food" (a mand). R et al. show the ears work first; L shows the mouth can come next.
Dove et al. (1974) used heart-rate instead of pecks to prove pigeons hear fine sound details. Both studies agree that birds can track tiny changes in human-made noises.
Mandell (1984) showed pigeons also notice how often events happen. R et al. add the rule that timing matters too: faster word rates sharpen control, just as faster food deliveries sharpen control in C’s study.
Why it matters
If a pigeon can sort speech sounds, so can many learners who struggle with language. Use short, clear words and quick turns when you teach new labels. Keep inter-trial times tight and give the learner time to hear the full word. The bird data remind us that stimulus control starts with the ear, not the mouth.
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02At a glance
03Original abstract
Four pigeons were trained on a multiple variable-interval 30-s extinction schedule with various pairs of spoken English words presented as the discriminative stimuli. The birds typically produced discrimination indices of 70% to 90% accuracy. Discrimination accuracy was improved by shortening the interval between auditory stimulus presentations, and by increasing the number of syllables in the words.
Journal of the experimental analysis of behavior, 1986 · doi:10.1901/jeab.1986.45-269