Spatial frequency tuning of facilitation by masks

H.D. Speed; John Ross

doi:10.1016/0042-6989(92)90015-B

Spatial frequency tuning of facilitation by masks

H.D. Speed, John Ross

School of Psychological Science

Research output: Contribution to journal › Article

4 Citations (Scopus)

Abstract

The spatial frequency tuning of facilitation by masks is derived for a 2 c/deg test grating, counterphased at 8.8 Hz, from the contrasts at which masks of different spatial frequencies facilitate maximally. This tuning function has a bandwidth at half height of roughly 1.5 octaves, much broader than has been estimated previously from tuning functions determined at a constant contrast for each mask. We show also that best facilitation more than doubles sensitivity for tests of 4 c/deg and below, and that the magnitude of the facilitation effect declines at higher spatial frequencies.

Original language	English
Pages (from-to)	1143-1148
Journal	Vision Research
Volume	32
DOIs	https://doi.org/10.1016/0042-6989(92)90015-B
Publication status	Published - 1992

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title = "Spatial frequency tuning of facilitation by masks",

abstract = "The spatial frequency tuning of facilitation by masks is derived for a 2 c/deg test grating, counterphased at 8.8 Hz, from the contrasts at which masks of different spatial frequencies facilitate maximally. This tuning function has a bandwidth at half height of roughly 1.5 octaves, much broader than has been estimated previously from tuning functions determined at a constant contrast for each mask. We show also that best facilitation more than doubles sensitivity for tests of 4 c/deg and below, and that the magnitude of the facilitation effect declines at higher spatial frequencies.",

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AB - The spatial frequency tuning of facilitation by masks is derived for a 2 c/deg test grating, counterphased at 8.8 Hz, from the contrasts at which masks of different spatial frequencies facilitate maximally. This tuning function has a bandwidth at half height of roughly 1.5 octaves, much broader than has been estimated previously from tuning functions determined at a constant contrast for each mask. We show also that best facilitation more than doubles sensitivity for tests of 4 c/deg and below, and that the magnitude of the facilitation effect declines at higher spatial frequencies.

U2 - 10.1016/0042-6989(92)90015-B

DO - 10.1016/0042-6989(92)90015-B

M3 - Article

VL - 32

SP - 1143

EP - 1148

JO - Vision Research

JF - Vision Research

SN - 0042-6989

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