Effects of diazepam and delta-9-THC on the discrimination of speech sounds in the baboon.

Rd, Hienz; Jv, Brady

doi:10.1037/e467902004-001

PsycEXTRA Dataset 1987

DOI: 10.1037/e467902004-001

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Effects of diazepam and delta-9-THC on the discrimination of speech sounds in the baboon.

Hienz Rd¹,

Brady Jv²

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Cited by 4 publications

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Cocaine's effects on speech sound discriminations and reaction times in baboons

et al. 1995

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Three adult baboons were trained using a psychophysical procedure to discriminate between different synthetic vowel sounds [symbol: see text]. Baboons pressed and held a lever down to produce a pulsed train of a single reference vowel that served as the standard stimulus. Animals were trained to release the lever only when this standard vowel sound changed to one of the four remaining comparison vowels. A lever release within 1.5 s of this change in vowel sounds was defined as a correct detection of the change from the standard vowel to one of the comparison vowels, and was reinforced. All baboons readily learned the vowel discriminations and detected vowel changes at the 90-100% correct performance level. Acute IM administration of cocaine prior to test sessions (0.00032-3.2 mg/kg) produced dose-dependent decrements in vowel discriminability. At the same time, cocaine shortened lever release latencies (reaction times) to the vowel stimuli in two of three baboons. The cocaine-induced decrements in vowel discriminability were correlated with the degree to which frequency differences occurred among the different vowels in that lower vowel discriminability scores were found for those vowels with smaller spectral differences from the standard vowel. Further, false alarm rates were not systematically affected by cocaine, indicating that the cocaine-induced decrements in vowel discrimination accuracy occurred in the absence of systematic changes in the reliability of the baboons' discrimination performances.

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Cocaine's effects on speech sound discriminations and reaction times in baboons

et al. 1995

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Cocaine's effects on the perception of socially significant vocalizations in baboons

Hienz

Weerts

2005

Pharmacology Biochemistry and Behavior

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Cocaine's effects on the discrimination of simple and complex auditory stimuli by baboons

Hienz

Weed

Zarcone

et al. 2002

Pharmacology Biochemistry and Behavior

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Effects of diazepam and delta-9-THC on the discrimination of speech sounds in the baboon.

Cited by 4 publications

References 0 publications

Cocaine's effects on speech sound discriminations and reaction times in baboons

Cocaine's effects on speech sound discriminations and reaction times in baboons

Cocaine's effects on the perception of socially significant vocalizations in baboons

Cocaine's effects on the discrimination of simple and complex auditory stimuli by baboons

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