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MOTION AS A NATURAL CATEGORY FOR PIGEONS: GENERALIZATION AND A FEATURE‐POSITIVE EFFECT

 

作者: Winand H. Dittrich,   Stephen E. G. Lea,  

 

期刊: Journal of the Experimental Analysis of Behavior  (WILEY Available online 1993)
卷期: Volume 59, issue 1  

页码: 115-129

 

ISSN:0022-5002

 

年代: 1993

 

DOI:10.1901/jeab.1993.59-115

 

出版商: Blackwell Publishing Ltd

 

关键词: concept discrimination;movement;feature‐positive effect;natural motion categories;video images;key peck;pigeons

 

数据来源: WILEY

 

摘要:

Three groups of pigeons were trained with a modified discriminative autoshaping procedure to discriminate video images of other pigeons on the basis of movement. Birds of all groups were shown the same video images of other pigeons, which were either moving or still. The group to whom food was presented only after moving images learned the discrimination very quickly. A second group, to whom food was given only after still images, and a pseudocategory group, to whom food was presented after arbitrarily chosen stimuli, showed no evidence of discrimination during acquisition training. Extinction conditions led to clear differences in peck rates to moving and still images in the second group but not in the pseudocategory group. The result is related to the feature‐positive effect. Generalization tests showed that the discrimination performance was based on visual features of the stimuli but was invariant against changes of size, perspective, brightness, and color. Furthermore, discrimination was maintained when novel images of pigeons under different viewing angles and seven other types of motion categories were presented. It is argued that the discrimination is based not on a common motion feature but on motion concepts or high‐order generalization across motion categor

 

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