ABA Fundamentals

Control of responding by sound location in monkeys: rapid acquisition in darkness.

Downey et al. (1975) · Journal of the experimental analysis of behavior 1975
★ The Verdict

Monkeys learned to locate sounds just as well in total darkness, proving auditory discrimination needs no visual support.

✓ Read this if BCBAs teaching auditory skills to clients with visual impairments or those wanting to test pure auditory control.
✗ Skip if BCBAs focused only on visual discrimination or social skills training.

01Research in Context

01

What this study did

Researchers worked with monkeys in a dark lab. They taught the animals to press a key when a sound came from the left side.

The team ran the same lesson in bright light and in total darkness. They wanted to see if the monkeys needed to see anything to learn the sound task.

02

What they found

Monkeys learned the sound task just as fast in the dark as in the light. Visual cues made no difference.

The animals reached accurate responding in only a few sessions, showing pure auditory control can be set up quickly.

03

How this fits with other research

Terrace (1969) showed monkeys can learn lever-pulling avoidance through shaping. Both studies prove monkeys pick up new operant responses fast.

Murphy (1982) argues orienting responses are autoshaped by stimulus-reinforcer pairings. The target paper adds that this works for auditory location too, not just visual cues.

Mellitz et al. (1983) found gerbils mastered a 17-arm maze quickly. Like the monkeys, they showed rapid spatial learning, but used brightness cues instead of sound.

04

Why it matters

You can teach auditory discrimination without any visual help. This is useful for clients with visual impairments or when you want to isolate auditory skills. Try running sound discrimination trials with lights off to check if vision is helping or hurting the learning.

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Run your next auditory discrimination trial in a dark room to see if the learner still responds correctly to sound cues alone.

02At a glance

Intervention
other
Design
single case other
Sample size
2
Population
neurotypical
Finding
positive

03Original abstract

Rapid control of responding by sound location is obtained in squirrel monkeys when sound stimuli are presented from one of two loudspeakers, each one adjacent to a response key. With this arrangement of loudspeakers and response keys, squirrel monkeys quickly learn to respond on the key near the source of the sound stimulus, and this pattern is the same whether or not responses near the sound source are differentially reinforcedmthis result may depend on a pre-experimental tendency in squirrel monkeys to orient head and eyes toward a sound, which would lead the animal to look at the response key in front of the loudspeaker producing the sound. The present experiment sought to determine whether visual stimuli are necessary for rapid control of responding by sound location. Two monkeys were trained in darkness in a sound-localization task similar to that described above. Results were similar to those obtained from animals trained in light, indicating that visual stimuli are not required for rapid acquisition of sound-localization behavior in monkeys.

Journal of the experimental analysis of behavior, 1975 · doi:10.1901/jeab.1975.23-265