Abstract:
:The rate of learning concurrent visual discriminations with 24-hr intertrial intervals, a measure of habit formation, was assessed in infant monkeys of both sexes and compared with the rate of learning in adults. In two separate series of animals, 3-month-old male monkeys learned an initial set of discriminations (but not later sets) more slowly than 3-month-old females. This gender difference was absent in 6-month-old monkeys and in adults, both of which learned the initial set at the same rate. Determination of plasma gonadal hormone levels at the time of testing revealed a significant correlation (rs = 0.95) between testosterone levels and learning scores on the initial set in the 3-month-old male monkeys (i.e., the higher the level the poorer the score). No such correlation was found in the 3-month-old female monkeys or in the 6-month-olds of either sex. These results suggest that high testosterone levels found perinatally in male monkeys temporarily slows maturation of the neural system underlying visual habit formation.
journal_name
Dev Psychobioljournal_title
Developmental psychobiologyauthors
Bachevalier J,Hagger C,Bercu Bbdoi
10.1002/dev.420220605subject
Has Abstractpub_date
1989-09-01 00:00:00pages
585-99issue
6eissn
0012-1630issn
1098-2302journal_volume
22pub_type
杂志文章abstract::C3H/HeJ male mice, an inbred strain showing retinal degeneration (rd), and normal-eyed DBA/IJ male mice were studied in a task requiring discrimination of horizontally and vertically oriented rectangles. The apparatus was modified Yerkes discrimination apparatus. The mice were given 30 days of discrimination training,...
journal_title:Developmental psychobiology
pub_type: 杂志文章
doi:10.1002/dev.420090209
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journal_title:Developmental psychobiology
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journal_title:Developmental psychobiology
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journal_title:Developmental psychobiology
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journal_title:Developmental psychobiology
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journal_title:Developmental psychobiology
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journal_title:Developmental psychobiology
pub_type: 杂志文章
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更新日期:1986-11-01 00:00:00
abstract::Newly hatched domestic chicks were given extended free access to 7 rates of intermittent white light between .5 and 24 flashes per sec. Inspection of the data showed approaches and departures directed toward the light that increased in number and formed an orderly pattern as the rates neared 4 per sec and as the chick...
journal_title:Developmental psychobiology
pub_type: 杂志文章
doi:10.1002/dev.420120506
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journal_title:Developmental psychobiology
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更新日期:1990-05-01 00:00:00
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journal_title:Developmental psychobiology
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journal_title:Developmental psychobiology
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更新日期:1987-07-01 00:00:00
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journal_title:Developmental psychobiology
pub_type: 杂志文章
doi:10.1002/dev.20320
更新日期:2008-09-01 00:00:00
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journal_title:Developmental psychobiology
pub_type: 杂志文章
doi:10.1002/dev.420090404
更新日期:1976-07-01 00:00:00
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更新日期:1980-01-01 00:00:00
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journal_title:Developmental psychobiology
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journal_title:Developmental psychobiology
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