Texture Displays | Feature Displays | Geometric Displays | Object Displays
Examples of Object Stimulus Displays
The object display type was similar to the geometric display type in organization, but its elements consisted of digitized depictions of natural objects (flowers, birds, fish, & humans). Same and Different examples of these display type was included for several reasons. Besides adding to the range of stimuli tested, these displays also encouraged the birds to process the displays globally, since each Aobject@ was made of multiple parts that differed in their shape and color details. As such, to successfully judge these displays these local details have to be ignored or integrated into a judgement based on the entirety of the object image. In addition, despite their popularity, little is still understood about what animals extract and interpret from complex multidimensional pictorial stimuli (Cook, 1993b; D=Amato & Van Sant, 1988; Fetterman, 1996; Watanabe, Lea, & Dittrich, 1993). Our recent focus on textured stimuli was brought about in part because of such concerns, as these precisely controlled synthetic stimuli of moderate complexity seemed ideal for bridging the gap between visual discriminations too simple to reveal much about visual cognition (e.g., red vs. green blobs) and discriminations too complex to be properly controlled or analyzed (e.g., many natural categorization experiments). Given our strong grounding in how pigeons perceive and process textured displays, it now seemed appropriate to tackle the intriguing, but still vexing, question of what pigeons see in pictures and photographs. The object display type was added with these goals in mind.
See elements used to create these displays
Dynamic
Texture Stimuli 
Same-Different
& SDT 
Same-Different
w/ Multiple Stimuli
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08/25/99
