Perception of coherent motion in random dot displays by pigeons and humans

Bischof, Walter F.; Reid, Sheri L.; Wylie, Doug R. W.; Spetch, Marcia L.

doi:10.3758/bf03207616

Cited by 43 publications

(64 citation statements)

References 30 publications

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“…This finding suggests they were not processing the sequential order of the information within a video, and perhaps not even seeing them as coherent presentations of the real world. Pigeons appear to have a higher threshold for distinguishing coherent from random motion (Bischof et al, 1999) and this may have played a role in limiting their capabilities to distinguish the different modes of video presentation tested here.…”

Section: Discussionmentioning

confidence: 98%

Successive two-item same-different discrimination and concept learning by pigeons

Cook

Kelly

Katz

2003

Behavioural Processes

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Four pigeons were trained in a successive same/different procedure involving the alternation of two stimuli per trial. Using a go/no-go procedure, two different or two identical color photographs were alternated, with a brief, dark, inter-stimulus interval, on a computer screen for 20 s. Pigeons learned to discriminate between same (S+) and different (D−) sequences with moderate to large contrasts between successive pictures. Analyses of pecking behavior within single trials revealed this discrimination emerged at the earliest possible point in the sequence (i.e. by the presentation of the second item). Pigeons transferred to novel color and gray-scale pictures, and showed savings in tests with novel video stimuli. These results suggest that same/different discrimination and concept formation can be acquired with successively presented pairs of stimuli by pigeons. When combined with results using simultaneous same/different presentations, these findings further support a qualitative similarity among birds and primates in their capacity to judge certain types of stimulus relations.

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Section: Discussionmentioning

confidence: 98%

Successive two-item same-different discrimination and concept learning by pigeons

Cook

Kelly

Katz

2003

Behavioural Processes

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“…The experimental chambers were modified pigeon operant chambers with touch screens inserted into one end of each chamber (for more details, see Bischof et al, 1999). Each touch screen was an infrared touch frame (Carroll Touch 1472) attached to a color monitor, with a thin sheet of Plexiglas inserted between the frame and the monitor.…”

Section: Behavioral Training and Testingmentioning

confidence: 99%

“…For both tasks, a two-alternative forcedchoice paradigm was used. For all birds, the motion task required detection of coherently moving random dots embedded in dynamic noise (Bischof et al, 1999) (Fig. 1 B).…”

Section: Behavioral Training and Testingmentioning

confidence: 99%

“…1 B). For 12 of the birds, the spatial-pattern task involved the detection of a square wave grating embedded in static noise (Bischof et al, 1999) (Fig. 1 A).…”

Section: Behavioral Training and Testingmentioning

confidence: 99%

“…Pigeons have a remarkable array of visual abilities (Hodos, 1993;Wasserman, 1995;Bischof et al, 1999;Kelly et al, 2001). There are many similarities with respect to the neuroanatomical organization and physiology of the avian and mammalian subcortical visual systems but marked differences with respect to telencephalic structures (Karten and Shimizu, 1989;Engelage and Bischof, 1993;Shimizu and Bowers, 1999).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Dissociation of Motion and Spatial-Pattern Vision in the Avian Telencephalon: Implications for the Evolution of “Visual Streams”

Nguyen¹,

Spetch²,

Crowder³

et al. 2004

J. Neurosci.

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The ectostriatum is a large visual structure in the avian telencephalon. Part of the tectofugal pathway, the ectostriatum receives a large ascending thalamic input from the nucleus rotundus, the homolog of the mammalian pulvinar complex. We investigated the effects of bilateral lesions of the ectostriatum in pigeons on visual motion and spatial-pattern perception tasks. To test motion perception, we measured performance on a task requiring detection of coherently moving random dots embedded in dynamic noise. To test spatialpattern perception, we measured performance on the detection of a square wave grating embedded in static noise. A double dissociation was revealed. Pigeons with lesions to the caudal ectostriatum showed a performance deficit on the motion task but not the grating task. In contrast, pigeons with lesions to the rostral ectostriatum showed a performance deficit on the grating task but not the motion task. Thus, in the avian telencephalon, there is a separation of visual motion and spatial-pattern perception as there is in the mammalian telencephalon. However, this separation of function is in the targets of the tectofugal pathway in pigeons rather than in the thalamofugal pathway as described in mammals. The implications of these findings with respect to the evolution of the visual system are discussed. Specifically, we suggest that the principle of parallel visual streams originated in the tectofugal pathway rather than the thalamofugal pathway.

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Stevens' Handbook of Experimental Psychology

Pashler¹

2002

236

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Perception of coherent motion in random dot displays by pigeons and humans

Cited by 43 publications

References 30 publications

Successive two-item same-different discrimination and concept learning by pigeons

Successive two-item same-different discrimination and concept learning by pigeons

A Dissociation of Motion and Spatial-Pattern Vision in the Avian Telencephalon: Implications for the Evolution of “Visual Streams”

Stevens' Handbook of Experimental Psychology

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