Invisible collinear structures impair search

Chow, Hiu Mei; Tseng, Chia-huei

doi:10.1016/j.concog.2014.10.004

Cited by 2 publications

(3 citation statements)

References 66 publications

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“…These results suggest that there is an overall worsening of performance (i.e., increased error rate and lengthened RT) when a target overlaps with the collinear or ocular distractor. The impairment by the collinear distractor replicates previous research (Chow et al, 2013;Chow & Tseng, 2015;. However, the impairment by the ocular distractor is contrary to our prediction based on earlier findings by Zhaoping (2008).…”

Section: Resultssupporting

confidence: 75%

“…All these properties are consistent with neuronal properties (e.g., collinear facilitation) known to exist in V1. Chow et al (2013) found that the collinear search impairment effect operates on monocular information, which is consistent with the finding that top-down strategies, such as learning, are unable to counteract the impairment (Tseng & Jingling, 2015) and that the impairment can be induced by collinear distractors that are rendered inaccessible to consciousness (Chow & Tseng, 2015). This collective evidence prompts the conclusion that collinear grouping operates in a bottom-up fashion possibly at V1.…”

Section: Introductionsupporting

confidence: 71%

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Eye of origin guides attention away: An ocular singleton column impairs visual search like a collinear column

2016

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Collinearity and eye of origin were recently discovered to guide attention: Target search is impaired if it is overlapping with a collinear structure (Jingling & Tseng, 2013) but enhanced if the target is an ocular singleton (Zhaoping, 2008). Both are proposed to occur in V1, and we study their interaction here. In our 9 × 9 search display (Experiment 1), all columns consisted of horizontal bars except for one randomly selected column that contained orthogonal bars (collinear distractor). All columns were presented to one eye except for a randomly selected column that was presented to the other eye (ocular distractor). The target could be located on a distractor column (collinear congruent [CC]/ocular congruent [OC]) or not (collinear incongruent [CI]/ocular incongruent [OI]). We expected to find the best search performance for OC + CI targets and the worst search performance for OI + CC targets. The other combinations would depend on the relative strength of collinearity and ocular information in guiding attention. As expected, we observed collinear impairment, but surprisingly, we did not observe any search advantage for OC targets. Our subsequent experiments confirmed that OC search impairment also occurred when color-defined columns (Experiment 2), ocular singletons (Experiments 4 and 5), and noncollinear columns (Experiment 5) were used instead of collinear columns. However, the ocular effect disappeared when paired with luminance-defined columns (Experiments 3A and 3B). Although our results agree well with earlier findings that eye-of-origin information guides attention, they highlight that our previous understanding of search advantage by ocular singleton targets might have been oversimplified.

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Section: Resultssupporting

confidence: 75%

Section: Introductionsupporting

confidence: 71%

Eye of origin guides attention away: An ocular singleton column impairs visual search like a collinear column

2016

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“…Instead, these reports support the view that these functions may be served by preconscious and automatic processing. In terms of collinear search impairment, Chow and Tseng 38 used dynamic noise patterns to mask out part of the collinear structure so that the visible parts were shorter than the critical length for provoking search impairment. Nevertheless, significant search impairment has been robustly reported, which indicates that the subjective awareness of a complete collinear structure is not required.…”

Section: Introductionmentioning

confidence: 99%

Collinear search impairment is luminance contrast invariant

Tseng

Chow

Liang

et al. 2021

Sci Rep

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Collinear search impairment (CSI) is a phenomenon where a task-irrelevant collinear structure impairs a target search in a visual display. It has been suggested that CSI is monocular, occurs without the participants’ access to consciousness and is possibly processed at an early visual site (e.g. V1). This effect has frequently been compared with a well-documented opposite effect called attentional capture (AC), in which salient and task-irrelevant basic features (e.g. color, orientation) enhance target detection. However, whether this phenomenon can be attributed to non-attentional factors such as collinear facilitation (CF) has not yet been formally tested. Here we used one well-established property of CF, i.e. that target contrast modulates its effect direction (facilitation vs suppression), to examine whether CSI shared similar signature profiles along different contrast levels. In other words, we tested whether CSI previously observed at the supra-threshold level was reduced or reversed at near-threshold contrast levels. Our results showed that, regardless of the luminance contrast levels, participants spent a longer time searching for targets displayed on the salient singleton collinear structure than those displayed off the structure. Contrast invariance suggests that it is unlikely that CSI is exclusively sub-served by an early vision mechanism (e.g. CF).

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Invisible collinear structures impair search

Cited by 2 publications

References 66 publications

Eye of origin guides attention away: An ocular singleton column impairs visual search like a collinear column

Eye of origin guides attention away: An ocular singleton column impairs visual search like a collinear column

Collinear search impairment is luminance contrast invariant

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