Pigeons use low rather than high spatial frequency information to make visual category discriminations.

Lea, Stephen E. G.; Filippo, Guido De; Dakin, Ruth; Meier, Christina

doi:10.1037/a0033104

Cited by 9 publications

(17 citation statements)

References 25 publications

(38 reference statements)

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“…Procedure within trials was the same as in Wills et al (2009, Experiment 2b), Nicholls et al (2011) and Lea et al (2013Lea et al ( , 2015. As in pretraining, two successive pecks to a positive stimulus led to its disappearance and the presentation of a side key and access to food reward.…”

Section: Procedurementioning

confidence: 99%

Multiple feature use in pigeons’ category discrimination: The influence of stimulus set structure and the salience of stimulus differences.

Lea¹,

Pothos

Wills³

et al. 2018

Journal of Experimental Psychology: Animal Learning and Cogniti

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Multiple feature use in pigeons' category discrimination: The influence of stimulus set structure and the salience of stimulus differences. Journal of Experimental Psychology: Animal Learning and Cognition, 44(2), pp. 114-127. doi: 10.1037/xan0000169 This is the accepted version of the paper.This version of the publication may differ from the final published version. Permanent repository link AbstractTwo experiments investigated what makes it more likely that pigeons' behavior will come under the control of multiple relevant visual stimulus dimensions. Experiment 1 investigated the effect of stimulus set structure, using a conditional discrimination between circles that differed in both hue and diameter. Two training conditions differed in whether hue and diameter were correlated in the same way within positive and negative stimulus sets as between sets. Transfer tests showed that all pigeons came under the control of both dimensions, regardless of stimulus set structure. Experiment 2 investigated the effect of the relative salience of the stimulus differences on three visual dimensions. Pigeons learned a multiple simultaneous discrimination between circular patches of sinusoidal gratings that differed in hue, orientation and spatial frequency. In initial training, each stimulus only included one positive or negative feature, and the stimulus differences on the three dimensions were adjusted so that the rates of learning about the three dimensions were kept approximately equal. Transfer tests showed that all three dimensions acquired control over behavior, with no single dimension dominating consistently across pigeons. Subsequently the pigeons were trained in a polymorphous category discrimination using all three dimensions, and the level of control by the three dimensions tended to become more equal as polymorphous training continued. We conclude that the salience of the stimulus differences on different dimensions is an important factor in whether pigeons will come under the control of multiple dimensions of visual stimuli.

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Section: Procedurementioning

confidence: 99%

Multiple feature use in pigeons’ category discrimination: The influence of stimulus set structure and the salience of stimulus differences.

Lea¹,

Pothos

Wills³

et al. 2018

Journal of Experimental Psychology: Animal Learning and Cogniti

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“…The original images were similar to those used by Lea et al (2013), but they were newly sourced and prepared for this experiment. Pictures of cats and dogs were downloaded from a variety of Internet sources; the heads were removed and placed on a circular medium grey background, and the resulting head images were converted into 240 × 240-pixel bitmap files, with a colour depth of 24 bits/pixel.…”

Section: Stimulus Materialsmentioning

confidence: 99%

“…Fig. 1 shows examples of the kinds of stimuli we used; to ensure that the results obtained by Lea et al (2013) were not due to any peculiarity of their stimuli, all the stimuli used in the present experiment were new. Because of our past experience of cats and dogs and pictures of them, humans recognize both kinds of filtered stimuli immediately as cat or dog faces, and would therefore generalize responses from one kind to the other.…”

Section: Introductionmentioning

confidence: 99%

“…Ghosh et al (2004) and Goto et al (2011) attempted to draw these and other results together by suggesting that, compared with humans, pigeons may be more sensitive to the higher spatial frequencies in a stimulus. In a direct test of this proposal, Lea et al (2013) trained pigeons to discriminate cat faces from dog faces, and then tested them with high-pass and low-pass filtered versions of the training stimuli, and with hybrid stimuli in which the http://dx.doi.org/10.1016/j.beproc.2014.11.012 0376-6357/© 2014 Elsevier B.V. All rights reserved. high spatial frequency components of a stimulus from one category were combined with the low spatial frequency components of a stimulus from the opposite category.…”

Section: Introductionmentioning

confidence: 99%

“…In particular, it investigated whether highand low-pass filtered versions of the kind of stimuli used by Lea et al (2013) contain truly independent information. Fig.…”

Section: Introductionmentioning

confidence: 99%

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Pigeons can learn to make visual category discriminations using either low or high spatial frequency information

Lea

Poser-Richet

Meier

2015

Behavioural Processes

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Pigeons were trained to discriminate photographs of cat faces from dog faces, using either high- or low-pass spatial frequency filtered stimuli. Each pigeon was trained with multiple exemplars of the categories, but only with either high-pass or low-pass filtered stimuli. Not all pigeons reached the discrimination criterion. Successful pigeons were exposed in probe trials to test stimuli: cat and dog faces that had been subjected to the opposite kind of filtering from their training stimuli; the unfiltered original stimuli from which their training stimuli had been derived; and new exemplars of the cat- and dog-face categories, with the same filtering as was used in training. There was no transfer of discrimination to the stimuli with the opposite filtering from those used in training. Discrimination transferred, with some decrement, to the original unfiltered stimuli and to new exemplars with the same type of filtering as used in training. These results provide further evidence that both high and low spatial frequency information can be sufficient for pigeons to make category discriminations, and that there is no clear advantage for high spatial frequency information. They also confirm that high-pass and low-pass spatial frequency filtering produce images that have effectively no information in common. This article is part of a Special Issue entitled: Tribute to Tom Zentall.

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Similar stimulus features control visual classification in orangutans and rhesus monkeys

Diamond

Stoinski

Mickelberg

et al. 2015

Jrnl Exper Analysis Behavior

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Many species classify images according to visual attributes. In pigeons, local features may disproportionately control classification, whereas in primates global features may exert greater control. In the absence of explicitly comparative studies, in which different species are tested with the same stimuli under similar conditions, it is not possible to determine how much of the variation in the control of classification is due to species differences and how much is due to differences in the stimuli, training, or testing conditions. We tested rhesus monkeys (Macaca mulatta) and orangutans (Pongo pygmaeus and Pongo abelii) in identical tests in which images were modified to determine which stimulus features controlled classification. Monkeys and orangutans were trained to classify full color images of birds, fish, flowers, and people; they were later given generalization tests in which images were novel, black and white, black and white line drawings, or scrambled. Classification in these primate species was controlled by multiple stimulus attributes, both global and local, and the species behaved similarly.

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Pigeons use low rather than high spatial frequency information to make visual category discriminations.

Cited by 9 publications

References 25 publications

Multiple feature use in pigeons’ category discrimination: The influence of stimulus set structure and the salience of stimulus differences.

Multiple feature use in pigeons’ category discrimination: The influence of stimulus set structure and the salience of stimulus differences.

Pigeons can learn to make visual category discriminations using either low or high spatial frequency information

Similar stimulus features control visual classification in orangutans and rhesus monkeys

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