Feature-based integration of orientation signals in visual search

Baldassi, Stefano; Burr, David

doi:10.1016/s0042-6989(00)00029-8

Cited by 103 publications

(101 citation statements)

References 31 publications

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“…A threshold mechanism for change detection also explains why change blindness may occur despite accurate visual representations of the scene. Similar threshold accounts of change detection that might explain implicit change detection have already been suggested (Laloyaux et al, 2006) based on visual short term memory (VSTM) models that postulate noisy representations of the visual world (Baldassi & Burr, 2000;Wilken & Ma, 2004).…”

Section: Discussionmentioning

confidence: 70%

Undetected changes in visible stimuli influence subsequent decisions

Laloyaux

Devue

Doyen

et al. 2008

Consciousness and Cognition

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Change blindness-our inability to detect changes in a stimulus-occurs even when the change takes place gradually, without any disruption . Such gradual changes are more difficult to detect than changes that involve a disruption. Using this method, David et al. (in press) recently showed substantial blindness to changes that involve facial expressions of emotion. In this experiment, we show that people who failed to detect any change in the displays were (1) nevertheless influenced by the changing information in subsequent recognition decisions about which facial expression they had seen, and (2) that their confidence in their decisions was lower after exposure to changing vs. static displays. The findings therefore support the notion that undetected changes that occur in highly salient stimuli may be causally efficacious and influence subsequent behaviour. Implications concerning the nature of the representations associated with undetected changes are discussed.3

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Section: Discussionmentioning

confidence: 70%

Undetected changes in visible stimuli influence subsequent decisions

Laloyaux

Devue

Doyen

et al. 2008

Consciousness and Cognition

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“…In one study, participants had to identify or localize the orientation of the most tilted target among slightly tilted distractors (Baldassi & Burr, 2000). Critically, unlike in In fact, these relatively early representations of objects contributed to average size judgments as much as later representations did.…”

Section: Resultsmentioning

confidence: 99%

Objects with reduced visibility still contribute to size averaging

Choo

Franconeri

2010

Attention, Perception, & Psychophysics

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People can rapidly judge the average size of a collection of objects with considerable accuracy. In this study, we tested whether this size-averaging process relies on relatively early object representations or on later object representations that have undergone iterative processing. We asked participants to judge the average size of a set of circles and, in some conditions, presented two additional circles that were either smaller or larger than the average. The additional circles were surrounded by four-dot masks that either lingered longer than the circle array, preventing further processing with object substitution masking (OSM), or disappeared simultaneously with the circle array, allowing the circle representation to reach later visual processing stages. Surprisingly, estimation of average circle size was modulated by both visible circles and circles whose visibility was impaired by OSM. There was also no correlation across participants between the influence of the masked circles and susceptibility to OSM. These findings suggest that relatively early representations of objects can contribute to the size-averaging process despite their reduced visibility.

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“…In Baldassi and Burr (2000), the targets were either right leaning or left leaning with vertical distractors. Observers made either a choice between left and right leaning (two-target identification) or a choice among n-alternative locations.…”

Section: Two-target Studiesmentioning

confidence: 99%

Set-size effects for identification versus localization depend on the visual search task.

Busey¹,

Palmer²

2008

Journal of Experimental Psychology: Human Perception and Perfor

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In both behavior and neuroscience research, it is debated whether the processing of identity and location is closely bound throughout processing. One aspect of this debate is the possibly privileged processing of identity or location. For example, processing identity may have unlimited capacity, while processing location does not. The authors have investigated the possibility of such privileged processing by measuring set-size effects for a variety of identification and localization tasks. In particular, set-size effects in accuracy visual search are measured with either 1 or 2 possible targets. For 1-target tasks, set-size effects are smaller for identification than localization; for 2-target tasks, set-size effects are larger for identification than localization. The observed crossover interaction is inconsistent with a privileged processing hypothesis for either identity or location. Furthermore, this interaction is predicted by an independent channel model based on signal detection theory, in which the details of each decision determine the relative magnitude of the set-size effects. This result is consistent with the similar processing of identity and location, and it refutes the privileged processing hypothesis for either identity or location.

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Feature-based integration of orientation signals in visual search

Cited by 103 publications

References 31 publications

Undetected changes in visible stimuli influence subsequent decisions

Undetected changes in visible stimuli influence subsequent decisions

Objects with reduced visibility still contribute to size averaging

Set-size effects for identification versus localization depend on the visual search task.

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