Title

Attentional selection in judgments of stereo depth

Author(s)/Creator(s)

Bart Farell, Syracuse UniversityFollow
Cherlyn J. Ng, University of RochesterFollow

ORCID

Bart Farell:

https://orcid.org/0000-0003-0902-5290

Cherlyn J. Ng:

https://orcid.org/0000-0001-5816-8744

Document Type

Article

Date

2019

Keywords

Stereoscopic vision, Attention, Depth perception, Stimulus dimensionality

Language

English

Funder(s)

National Science Foundation

Funding ID

NSF BCS-1257096

Acknowledgements

This research was supported by the National Science Foundation under Grant Number NSF BCS-1257096 to the first author.

Disciplines

Cognition and Perception | Psychology | Systems Neuroscience

Description/Abstract

Stereoscopic depth is most useful when it comes from relative rather than absolute disparities. However, the depth perceived from relative disparities can vary with stimulus parameters that have no connection with depth or are irrelevant to the task. We investigated observers’ ability to judge the stereo depth of task-relevant stimuli while ignoring irrelevant stimuli. The calculation of depth from disparity differs for 1-D and 2-D stimuli and we investigated the role this difference plays in observers’ ability to selectively process relevant information. We show that the presence of irrelevant disparities affects perceived depth differently depending on stimulus dimensionality. Observers could not ignore disparities of irrelevant stimuli when they judged the relative depth between a 1-D stimulus (a grating) and a 2-D stimulus (a plaid). Yet these irrelevant disparities did not affect judgments of the relative depth between 2-D stimuli. Two processes contributing to stereo depth were identified, only one of which computes depth from a horizontal disparity metric and permits attentional selection. The other uses all stimuli, relevant and irrelevant, to calculate an effective disparity direction for comparing disparity magnitudes. These processes produce inseparable effects in most data sets. Using multiple disparity directions and comparing 1-D and 2-D stimuli can distinguish them.

ISSN

1878-5646

Additional Information

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Recommended Citation

Farell, B. & Ng, C. J. (2019). Attentional selection in judgments of stereo depth. Vison Research, 158, 19-30. https://doi.org/10.1016/j.visres.2018.08.007 PMID:30771360

Source

submission

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 4.0 International License.

Rights

Author Final Manuscript, CCBY 4.0 Version of Record is embargoed and available through publisher at this time.