opiTemporalStimulus: Stimulus parameter list.

Description Details Author(s) References Examples

Description

List containing stimulus parameters with an S3 class attribute of opiTemporalStimulus.

Details

Octopus 900

x and y are in degrees, with precision to one decimal place recognised.

image is not possible on an Octopus 900.

lut is not possible on an Octopus 900. Stimulus is at 0 dB.

rate is in Hz, with precision to one decimal place recognised.

color is ignored. Use opiSetBackground() to alter stimulus color.

Kowa AP-7000

Not supported.

Author(s)

Andrew Turpin <[email protected]>

References

Please cite: A. Turpin, P.H. Artes and A.M. McKendrick "The Open Perimetry Interface: An enabling tool for clinical visual psychophysics", Journal of Vision 12(11) 2012.

http://perimetry.org/OPI

Examples

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    # A Size III flickering with a 10Hz square wave at
    # location (7,7) with luminance 10 dB (HFA) 
stim <- list(x=7, y=7, size=0.43, color="white", 
                rate=20,        # one lut step per 50 ms 
                lut=c(0,318),   # so one full lut per 100 ms == 10Hz 
                duration=400,   # and 4 cycles per stimulus
                responseWindow=1500) 
class(stim) <- "opiTemporalStimulus"

OPI documentation built on May 30, 2017, 12:35 a.m.