Effects of pattern redundancy and hierarchical grouping on global–local visual processing in monkeys (Cebus apella) and humans (Homo sapiens)

Lillo, Carlo De; Palumbo, Milena; Spinozzi, Giovanna; Giustino, Giuseppe

doi:10.1016/j.bbr.2011.09.040

Cited by 10 publications

(17 citation statements)

References 40 publications

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“…Therefore, it seems that the encoding or the retention of the global properties of visual patterns is particularly vulnerable in capuchin monkeys. Capuchins can process the global aspects of stimuli, as shown here and in previous studies (De Lillo et al, 2011, 2012; Spinozzi et al, 2003, 2006). However, the results of this study show that global information is either encoded less accurately or deteriorates more rapidly in memory than local information.…”

Section: Discussionsupporting

confidence: 71%

“…Nevertheless, in contrast with humans, capuchin monkeys process at a higher 73 level of accuracy the local levels of hierarchical visual stimuli that are specifically 74 designed to require grouping at both levels of stimulus structure (De Lillo et al, 2012). 75…”

Section: Introduction 29 30mentioning

confidence: 99%

“…An unresolved problem in visual cognition is the reason why the well-established advantage shown by humans in the processing of global properties of visual patterns is not present in other primates species which nevertheless share very similar visual systems (e.g., Fobes & King, 1982; Kremers, 2005; Ungerleider & Mishkin, 1982). Whereas humans are faster at identifying the global configuration compared to the local elements, monkey species, in most cases, process the local components of hierarchical patterns more proficiently than their global structure (capuchins: De Lillo, Spinozzi, Palumbo, & Giustino, 2011; De Lillo, Palumbo, Spinozzi, & Giustino, 2012; Spinozzi et al, 2003; Spinozzi, De Lillo, & Salvi, 2006; baboons: Deruelle & Fagot, 1998; Fagot & Deruelle, 1997; macaques: Hopkins & Washburn, 2002; for different results see Neiworth et al, 2006; Tanaka & Fujita, 2000; Tanaka et al, 2001). On the other hand, chimpanzees, in contrast with monkeys, do not always process the local features of the compound patterns better than their global shape (Fagot & Tomonaga, 1999; Hopkins & Washburn, 2002).…”

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confidence: 99%

“…According to some authors, these results can reflect a greater difficulty of monkeys compared with humans in grouping the local elements into a coherent whole rather than a local advantage per se (Fagot & Barbet, 2006). Nevertheless, in contrast with humans, capuchin monkeys process at a higher level of accuracy the local levels of hierarchical visual stimuli that are specifically designed to require grouping at both levels of stimulus structure (De Lillo et al, 2012).…”

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confidence: 99%

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Short-term memory effects on visual global/local processing in tufted capuchin monkeys (Sapajus spp.).

Truppa

Simone

Lillo

2016

Journal of Comparative Psychology

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All authors contributed equally to the paper.We wish to thank the three anonymous reviewers for their valuable suggestions and constructive comments on the manuscript. We acknowledge Massimiliano Bianchi and Simone Cartarinacci for help with animal management and Ludovica Cazzato for help with data collection. We also thank the Comune di Roma-Museo Civico Zoologia and Non-human primates, differently from humans, are less proficient at processing 6 global properties of visual compound stimuli. It has been suggested that humans 7 preferentially process stimuli globally because this enables a more economical encoding 8 of the stimuli. In this study we assessed the role of short-term memory in global/local 9 processing by presenting tufted capuchin monkeys with Navon-type hierarchical figures 10 in both simultaneous and delayed matching-to-sample tasks. Capuchins' ability to 11 discriminate hierarchical stimuli was evaluated as a function of increasing delay intervals 12 (0.0, 0.5, 1.0, 2.0 and 3.0 sec) between the disappearance of the sample and the 13 presentation of the comparison stimuli. The results showed that recognition accuracy for 14 local features was above chance level with delays of up to 3.0 sec, as previously reported 15 when capuchins were faced with non-hierarchical stimuli. By contrast, the recognition of 16 global configurations was above chance level in simultaneous, 0.0 and 0.5 sec delay 17 conditions but not at delay intervals of 1.0 sec or longer. These findings indicate that 18 capuchins' propensity to process the local properties of visual stimuli can be observed 19 when a delay is interposed between the presentation of sample and comparison stimuli 20 and was not reversed by increasing the delay. Moreover, our results show that capuchins' 21 local propensity was not reversed by increasing stimulus size. Overall, our study 22 confirms crucial differences between human and non-human primates and adds new 23 insights into the comparative research on visual grouping functions of these species. 24 25

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Section: Discussionsupporting

confidence: 71%

Section: Introduction 29 30mentioning

confidence: 99%

mentioning

confidence: 99%

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confidence: 99%

See 2 more Smart Citations

Short-term memory effects on visual global/local processing in tufted capuchin monkeys (Sapajus spp.).

Truppa

Simone

Lillo

2016

Journal of Comparative Psychology

Self Cite

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“…In both experiments, dogs performed better in the discrimination test at the local level than the global level, and therefore seemed to have a general preference for local elements and a better ability to discriminate at the local level. This local bias can come from a genuine preference for local rather than a global stimuli, as has been found in a number of other species [22][23][24] . However, we cannot rule out that this local preference was due to the small sample size in our study, and may be related to either individual preferences 20 or potentially the particular breed that we used (e.g., the beagle is a hunting dog and so may have been selected for a local preference).…”

Section: Experiments 2 Social Interaction Testmentioning

confidence: 65%

Can’t see the forest for the trees? Investigating attentional scope as a novel indicator of emotional state in animals

Hamlaoui

Keeling

Burman

et al. 2022

Preprint

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In humans, contrasting emotional states can lead to a broadening or narrowing of attentional scope. Whether this is also the case in animals has yet to be investigated. If confirmed, measurement of attentional scope has potential as a novel cognitive method of welfare assessment. In this study, we therefore aimed to validate a test of attentional scope as a measure of emotional state in animals. We did this by inducing four putatively different emotional states in dogs (N = 10), varying in valence (positive, negative) and arousal (high, low), in two different reward contexts (food rewards in Experiment 1, social rewards in Experiment 2) and then assessing dogs’ behavioural responses in a test of attentional scope. We also recorded heart rate variability (HRV) parameters as additional confirmatory affective indicators. In Experiment 1, the dogs showed a narrowing of attentional scope after the induction of both positively valenced emotional states. That dogs were in a positive state was supported by the reduced Standard Deviation of normal-to-normal R-R intervals (SDNN) and the reduced Low Frequency (LF) and Very Low Frequency (VLF) HRV. In Experiment 2, when responses to social rewards were examined, the dogs showed attentional narrowing only in the low arousal negative treatment, while the LF and VLF were reduced in the high arousal positive treatment. In conclusion, our study provides the first indication that emotional states can also alter attentional scope in animals. The results justify further investigation of this approach for use in animal welfare assessment, although further studies are needed to refine predictions.

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Variations in the Beneficial Effects of Spatial Structure and Serial Organisation on Working Memory Span in Humans and Other Species

Lillo

2019

Processes of Visuospatial Attention and Working Memory

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Effects of pattern redundancy and hierarchical grouping on global–local visual processing in monkeys (Cebus apella) and humans (Homo sapiens)

Cited by 10 publications

References 40 publications

Short-term memory effects on visual global/local processing in tufted capuchin monkeys (Sapajus spp.).

Short-term memory effects on visual global/local processing in tufted capuchin monkeys (Sapajus spp.).

Can’t see the forest for the trees? Investigating attentional scope as a novel indicator of emotional state in animals

Variations in the Beneficial Effects of Spatial Structure and Serial Organisation on Working Memory Span in Humans and Other Species

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