Gabor: Detection of a 2 cycle/window Gabor temporal modulation
In MPDiR: Data Sets and Scripts for Modeling Psychophysical Data in R
Gabor R Documentation
Detection of a 2 cycle/window Gabor temporal modulation
Description
The data record the observations of one observer performing a Yes/No detection task. The signal was a temporal luminance modulation of a Gaussian spatial profile (\sigma = 2.5 deg) on a CRT screen. The temporal modulation followed a Gabor function with an envelope of \sigma = 160 ms and duration of 4\sigma. The carrier was in sine-phase and of frequency 2 cycles/window width. On each trial random uniform luminance modulations were presented, and on half of the trials, the signal was added in. The data represent 16 sessions of 224 trials each.
Usage
data(Gabor)
Format
A data frame with 114688 observations on the following 4 variables.
respa factor with levels H FA M CR. These correspond to the response classifications of the observer and correspond to ‘Hit’, ‘False Alarm’, ‘Miss’ and ‘Correct Rejection’.
timea factor with levels 1, 2, ..., 32 indicating the time points of the stimulus coded as factor levels.
Timea numeric vector indicating time points of the stimulus in seconds.
Na numeric vector of random uniform noise, the random part of the stimulus. On half of the trials the Gabor signal was added to the noise.
Details
More details on the stimulus conditions are given in the reference indicated below.
Source
J. P. Thomas, and K. Knoblauch (2005) Frequency and phase contributions to the detection of temporal luminance modulation. Journal of the Optical Society of America A,
22, 2257–2261.
Examples
data(Gabor)
str(Gabor)
MPDiR documentation built on Aug. 19, 2023, 5:11 p.m.
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| Gabor | R Documentation |
Detection of a 2 cycle/window Gabor temporal modulation
Description
The data record the observations of one observer performing a Yes/No detection task. The signal was a temporal luminance modulation of a Gaussian spatial profile (\sigma = 2.5 deg) on a CRT screen. The temporal modulation followed a Gabor function with an envelope of \sigma = 160 ms and duration of 4\sigma. The carrier was in sine-phase and of frequency 2 cycles/window width. On each trial random uniform luminance modulations were presented, and on half of the trials, the signal was added in. The data represent 16 sessions of 224 trials each.
Usage
data(Gabor)Format
A data frame with 114688 observations on the following 4 variables.
respa factor with levels
HFAMCR. These correspond to the response classifications of the observer and correspond to ‘Hit’, ‘False Alarm’, ‘Miss’ and ‘Correct Rejection’.timea factor with levels
1,2, ...,32indicating the time points of the stimulus coded as factor levels.Timea numeric vector indicating time points of the stimulus in seconds.
Na numeric vector of random uniform noise, the random part of the stimulus. On half of the trials the Gabor signal was added to the noise.
Details
More details on the stimulus conditions are given in the reference indicated below.
Source
J. P. Thomas, and K. Knoblauch (2005) Frequency and phase contributions to the detection of temporal luminance modulation. Journal of the Optical Society of America A, 22, 2257–2261.
Examples
data(Gabor)
str(Gabor)
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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