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Visual Features: Featural Strength and Visual Strength Are Two Dissociable Dimensions.

Huang L - Sci Rep (2015)

Bottom Line: The results confirmed that featural strength has substantial effects on high-level tasks but only a negligible effect on the low-level task.The results also revealed a complementary interaction: Visual strength has a substantial effect on the low-level task, but a negligible effect on high-level tasks.The present results, along with other findings, challenge the generality of processing visual features.

View Article: PubMed Central - PubMed

Affiliation: Department of Psychology, The Chinese University of Hong Kong, Hong Kong, China.

ABSTRACT
Visual features are often assumed to be the general building blocks for various visual tasks. However, it is well known that some stimulus categories (i.e., basic features) can be processed in parallel, but others (e.g., Ts in different orientations) need to be scanned serially, and this difference in featural strength seems to be on a fundamentally different dimension from differences in visual strength (e.g., reduction in contrast). This study compared two high-level tasks, namely tasks that require a lot of attentional operations (change detection and pattern comparison), with one low-level task, namely a task that requires few attentional operations (perceptual discrimination). The results confirmed that featural strength has substantial effects on high-level tasks but only a negligible effect on the low-level task. The results also revealed a complementary interaction: Visual strength has a substantial effect on the low-level task, but a negligible effect on high-level tasks. Overall, featural strength and visual strength are two dissociable dimensions in processing of visual features. The present results, along with other findings, challenge the generality of processing visual features.

No MeSH data available.


A research question.One question that was addressed in this study was whether a high-level task is significantly affected by visual strength. In the pattern comparison task, I ask whether this comparison is substantially more difficult in low-contrast displays (panel b) than in high-contrast displays (panel a).
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f2: A research question.One question that was addressed in this study was whether a high-level task is significantly affected by visual strength. In the pattern comparison task, I ask whether this comparison is substantially more difficult in low-contrast displays (panel b) than in high-contrast displays (panel a).

Mentions: However, to the best of my knowledge, no previous study has provided clear conclusions for the effect of visual strength in high-level tasks. The present study attempts to fill in this gap. To illustrate this question in a concrete task, consider the task of comparing two patterns of colors (Fig. 2), which is known to be a laborious task8: Here, I ask whether such a comparison will be substantially more difficult in low-contrast displays (Fig. 2b) than in high-contrast displays (Fig. 2a).


Visual Features: Featural Strength and Visual Strength Are Two Dissociable Dimensions.

Huang L - Sci Rep (2015)

A research question.One question that was addressed in this study was whether a high-level task is significantly affected by visual strength. In the pattern comparison task, I ask whether this comparison is substantially more difficult in low-contrast displays (panel b) than in high-contrast displays (panel a).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4562251&req=5

f2: A research question.One question that was addressed in this study was whether a high-level task is significantly affected by visual strength. In the pattern comparison task, I ask whether this comparison is substantially more difficult in low-contrast displays (panel b) than in high-contrast displays (panel a).
Mentions: However, to the best of my knowledge, no previous study has provided clear conclusions for the effect of visual strength in high-level tasks. The present study attempts to fill in this gap. To illustrate this question in a concrete task, consider the task of comparing two patterns of colors (Fig. 2), which is known to be a laborious task8: Here, I ask whether such a comparison will be substantially more difficult in low-contrast displays (Fig. 2b) than in high-contrast displays (Fig. 2a).

Bottom Line: The results confirmed that featural strength has substantial effects on high-level tasks but only a negligible effect on the low-level task.The results also revealed a complementary interaction: Visual strength has a substantial effect on the low-level task, but a negligible effect on high-level tasks.The present results, along with other findings, challenge the generality of processing visual features.

View Article: PubMed Central - PubMed

Affiliation: Department of Psychology, The Chinese University of Hong Kong, Hong Kong, China.

ABSTRACT
Visual features are often assumed to be the general building blocks for various visual tasks. However, it is well known that some stimulus categories (i.e., basic features) can be processed in parallel, but others (e.g., Ts in different orientations) need to be scanned serially, and this difference in featural strength seems to be on a fundamentally different dimension from differences in visual strength (e.g., reduction in contrast). This study compared two high-level tasks, namely tasks that require a lot of attentional operations (change detection and pattern comparison), with one low-level task, namely a task that requires few attentional operations (perceptual discrimination). The results confirmed that featural strength has substantial effects on high-level tasks but only a negligible effect on the low-level task. The results also revealed a complementary interaction: Visual strength has a substantial effect on the low-level task, but a negligible effect on high-level tasks. Overall, featural strength and visual strength are two dissociable dimensions in processing of visual features. The present results, along with other findings, challenge the generality of processing visual features.

No MeSH data available.