Abstract:
:Previous studies have presented evidence for the existence of channels tuned to the spatial frequency (SF) of binocular disparity modulation. Bandwidths reported for masking curves were extremely narrow, possibly because of off-frequency viewing, whereby observers can best detect a signal with a channel tuned to an SF on the opposite side of the signal from the masker's SF, rather than with a channel tuned directly to the signal's SF. Herein are reported the results of four detection experiments. Experiment 1 measures unmasked threshold for detection of a cyclopean grating. Experiments 2-4 are masking experiments. Experiment 2 demonstrates that threshold for detection of a cyclopean grating is proportional to the intensity of masking noise, which is consistent with the operation of linear channels. Experiments 3 and 4 demonstrate that masking curves are narrower when obtained with narrowband-noise maskers than when obtained with notched-noise maskers, which render the off-frequency viewing ineffective. Implications for understanding the processing of cyclopean images are discussed.
journal_name
Vision Resjournal_title
Vision researchauthors
Cobo-Lewis AB,Yeh YYdoi
10.1016/0042-6989(94)90016-7subject
Has Abstractpub_date
1994-03-01 00:00:00pages
607-20issue
5eissn
0042-6989issn
1878-5646pii
0042-6989(94)90016-7journal_volume
34pub_type
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