Global/local processing of hierarchical visual stimuli in a conflict–choice task by capuchin monkeys (Sapajus spp.)

Truppa, Valentina; Carducci, Paola; Simone, Diego Antonio De; Bisazza, Angelo; Lillo, Carlo De

doi:10.1007/s10071-016-1057-3

Cited by 9 publications

(7 citation statements)

References 42 publications

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“…Interestingly, a prevalence of global over local feature processing—the so-called global precedence effect (Navon, 1977)—that was shown in (western) humans could not be found in baboons (Fagot & Deruelle, 1997). Data from capuchin monkeys also suggest a more locally oriented processing style (Spinozzi et al, 2006; Truppa et al, 2016, 2017). Whereas these monkey subjects primarily process the local features of a stimulus array, chimpanzees seem to fall in between humans and monkeys depending on the presentation format used.…”

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confidence: 98%

Are you as fooled as I am? Visual illusions in human (Homo) and nonhuman (Sapajus, Gorilla, Pan, Pongo) primate species.

Hanus¹,

Truppa²,

Call³

2023

Journal of Comparative Psychology

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It has been argued that humans’ susceptibility to visual illusions does not simply reflect cognitive flaws but rather specific functional adaptations of our perceptual system. The data on cross-cultural differences in the perception of geometric illusions seemingly support this explanation. Little is known, however, about the developmental trajectories of such adaptations in humans, let alone a conclusive picture of the illusionary susceptibility in other primate species. So far, most developmental or comparative studies have tested single illusions with varying procedural implementations. The current study aims at overcoming these limitations by testing human subjects of four different age classes (3- to 5 year-old children and adults) and five nonhuman primate species (capuchin monkeys, bonobos, chimpanzees, gorillas, and orangutans) with an identical setup in five well-known geometric illusions (horizontal–vertical, Ebbinghaus, Mueller-Lyer, Ponzo, and Sander). Two food items of identical size were presented on separate trays with surrounding paintings eliciting the illusion of size differences and subjects were required to choose one of the items. Four of the five illusions elicited a strong effect in adult humans, and older children showed a greater susceptibility to illusions than younger ones. In contrast, only two illusions (Ebbingaus and horizontal–vertical) elicited a mild effect on nonhuman primates with high variation within species and little variation between species. Our results suggests that humans learn to see illusions as they develop during childhood. They also suggest that future work should address how nonhuman primates’ experience of these illusion changes throughout their development.

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confidence: 98%

Are you as fooled as I am? Visual illusions in human (Homo) and nonhuman (Sapajus, Gorilla, Pan, Pongo) primate species.

Hanus¹,

Truppa²,

Call³

2023

Journal of Comparative Psychology

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“…Research on perceptual grouping has extensively examined two levels of hierarchical processing, centering on the relative primacy of global features versus local features within a scene [ 1 – 6 ]. Global processing involves integrating various elements into a coherent whole, while local processing concentrates on the finer details of a prominent object or situation [ 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

“…Numerous studies exploring perceptual grouping processes with visual stimuli reveal variations in the precedence of global or local cues across different species, including humans [ 9 – 11 ], chimpanzees [ 3 , 11 , 12 ], baboons [ 10 ], rhesus monkeys [ 12 ], cotton top tamarins [ 13 ], and capuchin monkeys [ 6 , 9 , 14 ]. In the context of platyrrhine monkeys, investigations into global and local processing have predominantly focused on capuchin monkeys [ 1 , 5 , 6 , 9 , 14 – 19 ]. Several of these experiments utilized matching-to-sample (MTS) procedures, and their outcomes consistently demonstrated an advantage for local level of hierarchical processing [ 1 , 14 , 16 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Investigation of preference for local and global processing of Capuchin-monkeys (Sapajus spp.) in shape discrimination of mosaic arrangements

Mendes,

Brino,

Goulart

et al. 2024

PLoS ONE

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Classical experiments using hierarchical stimuli to investigate the ability of capuchin monkeys to integrate visual information based on global or local clues reported findings suggesting a behavioral preference for local information of the image. Many experiments using mosaics have been conducted with capuchin monkeys to identify some of their perceptual phenotypes. As the identification of an image in a mosaic demands the integration of elements that share some visual features, we evaluated the discrimination of shapes presented in solid and mosaic stimuli in capuchin monkeys. Shape discrimination performance was tested in 2 male adult capuchin monkeys in an experimental chamber with a touchscreen video monitor, in three experiments: (i) evaluation of global and local processing using hierarchical stimuli; (ii) evaluation of target detection using simple discrimination procedures; (iii) evaluation of shape discrimination using simple discrimination and delayed matching-to-sample procedures. We observed that both monkeys had preferences for local processing when tested by hierarchical stimuli. Additionally, detection performance for solid and mosaic targets was highly significant, but for shape discrimination tasks we found significant performance when using solid figures, non-significant performance when using circle and square shapes in mosaic stimuli, and significant performance when using Letter X and Number 8 shapes in mosaic stimuli. Our results are suggestive that the monkeys respond to local contrast and partly to global contrast in mosaic stimuli.

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“…In parallel, the question of configural/holistic processing for other visual objects has been mainly investigated by using Navon-like hierarchical stimuli (stimuli showing a global shape or configuration created by the spatial arrangement of local shapes). Most tested species demonstrated a preference to process local information rather than the global configuration [e.g., baboons ( Fagot and Deruelle, 1997 ), capuchin monkeys ( Truppa et al, 2017 ), or chicks ( Chiandetti et al, 2014 )]. To date, only Humans ( Navon, 1977 ), a fish species Xenotoca eiseni ( Truppa et al, 2010 ) and honeybees ( Avarguès-Weber et al, 2015 ) showed consistent global preference suggesting a general importance of visual configural processing in these species.…”

Section: Introductionmentioning

confidence: 99%

Does Holistic Processing Require a Large Brain? Insights From Honeybees and Wasps in Fine Visual Recognition Tasks

et al. 2018

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The expertise of humans for recognizing faces is largely based on holistic processing mechanism, a sophisticated cognitive process that develops with visual experience. The various visual features of a face are thus glued together and treated by the brain as a unique stimulus, facilitating robust recognition. Holistic processing is known to facilitate fine discrimination of highly similar visual stimuli, and involves specialized brain areas in humans and other primates. Although holistic processing is most typically employed with face stimuli, subjects can also learn to apply similar image analysis mechanisms when gaining expertise in discriminating novel visual objects, like becoming experts in recognizing birds or cars. Here, we ask if holistic processing with expertise might be a mechanism employed by the comparatively miniature brains of insects. We thus test whether honeybees (Apis mellifera) and/or wasps (Vespula vulgaris) can use holistic-like processing with experience to recognize images of human faces, or Navon-like parameterized-stimuli. These insect species are excellent visual learners and have previously shown ability to discriminate human face stimuli using configural type processing. Freely flying bees and wasps were consequently confronted with classical tests for holistic processing, the part-whole effect and the composite-face effect. Both species could learn similar faces from a standard face recognition test used for humans, and their performance in transfer tests was consistent with holistic processing as defined for studies on humans. Tests with parameterized stimuli also revealed a capacity of honeybees, but not wasps, to process complex visual information in a holistic way, suggesting that such sophisticated visual processing may be far more spread within the animal kingdom than previously thought, although may depend on ecological constraints.

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Global/local processing of hierarchical visual stimuli in a conflict–choice task by capuchin monkeys (Sapajus spp.)

Abstract: Acknowledgements 21We thank two anonymous reviewers for their thoughtful suggestions and constructive comments on 22 the manuscript. We are also grateful to Tyrone Lucon Xiccato for his helpful statistical suggestions.

Cited by 9 publications

References 42 publications

Are you as fooled as I am? Visual illusions in human (Homo) and nonhuman (Sapajus, Gorilla, Pan, Pongo) primate species.

Are you as fooled as I am? Visual illusions in human (Homo) and nonhuman (Sapajus, Gorilla, Pan, Pongo) primate species.

Investigation of preference for local and global processing of Capuchin-monkeys (Sapajus spp.) in shape discrimination of mosaic arrangements

Does Holistic Processing Require a Large Brain? Insights From Honeybees and Wasps in Fine Visual Recognition Tasks

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