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  • 1
    Electronic Resource
    Electronic Resource
    Acquisition and transfer of visual Go/No-go discrimination by a chimpanzee (1990)
    Springer
    Primates 31 (1990), S. 439-447 
    Details
    ISSN: 0032-8332
    Keywords: Go/No-go discrimination ; Acquisition ; Transfer ; Learning-set formation ; Repeated use of stimuli ; Chimpanzee
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract An adolescent female chimpanzee was trained to press a key in the presence of a computer-graphic geometric figure (“Go” stimulus) within 5 sec and not to press the key during 5-sec presentations of another figure (“No-go” stimulus) with food reinforcement. In the acquisition training, the accuracy of performance increased primarily as a result of learning to inhibit key presses in No-go trials. The chimpanzee acquired this “Go/No-go” visual discrimination task in 1,260 trials. She was then given 14 successive transfer problems. The results for these problems suggested that learning-set formation and repeated use of the same discriminative stimuli both influenced transfer to new problems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02381116
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Multidimensional auditory stimulus control in a chimpanzee (Pan troglodytes) (1990)
    Springer
    Primates 31 (1990), S. 545-553 
    Details
    ISSN: 0032-8332
    Keywords: Auditory compound discrimination ; Attention ; Multidimensional stimulus control ; Discriminability ; Key press ; Chimpanzee
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract An adolescent female chimpanzee (Pan troglodytes) was trained to discriminate auditory compound stimuli differing in tonal frequency and/or tone on-off rate. Following acquisition training and overtraining, she was shifted to multidimensional stimulus control testing using redundant relevant auditory stimulus sets with discriminability of elements in each dimension varied systematically. Although the control by both dimensions changed significantly as a function of discriminability, the degree of dimensional control was stronger in the tone on-off rate than in the tonal frequency. These results clearly demonstrated “attentional” control of the chimpanzee's auditory discrimination behavior and the interaction between two dimensions of auditory stimuli.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02382537
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    Paper (German National Licenses)
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