List containing stimulus parameters with an S3 class attribute
of opiStaticStimulus
"See details"The list should be of class opiStaticStimulus and contain the following elements.
x coordinate of the center of stimulus in degrees relative to fixation
y coordinate of the center of stimulus in degrees relative to fixation
image an image to display in a machine specific format
level stimulus level in cd/\(\mbox{m}^2\) (ignored if
!is.na(image))
size diameter of target in degrees, or scaling factor for image if
specified
color machine specific stimulus color settings (ignored if
!is.na(image))
duration total stimulus duration in milliseconds maximum
responseWindow time (>= 0) in milliseconds to wait for a response
from the onset of the stimulus presentation
... machine-specific parameters
Only level is used.
Duration and location are ignored, color is assumed "white" and
size is assumed to be 26/60 (Goldmann III).
x and y are in degrees, with precision to one decimal place
recognised.
image is not possible on an Octopus 900.
level is in cd/\(\mbox{m}^2\), and is rounded to the nearest one
tenth of a dB for display.
color is ignored. Use opiSetBackground() to alter stimulus color
checkFixationOK is a function that takes the return value from
opiPresent and returns either TRUE, indicating that fixation
was good for the presentation; or FALSE, indicating that fixation
was not good for the presentation.
As for the Octopus 900, but a responseWindow of -1 means that the
Octopus 900 server will wait until either the L and R button is pressed in the
controller until returning.
x and y are in degrees. (precision?)
image is not possible on an Kowa AP 7000.
level are in cd/\(\mbox{m}^2\) in the range 0.03 to 3183,
nearest one tenth of a dB for display.
size is in degrees, but is rounded to the nearest Goldmann Size I..V
for display.
color one of .OpiEnv$KowaAP7000$COLOR_WHITE,
.OpiEnv$KowaAP7000$COLOR_GREEN, .OpiEnv$KowaAP7000$COLOR_BLUE, and
.OpiEnv$KowaAP7000$COLOR_RED.
x, y, level, size, and color are not used.
image is a list of two matrices: the first for the right eye, the
second for the left. Each image is a 1080x1080 matrix with each element in
the range 0 to 80, which maps onto 0dB to 40dB in steps of 0.5dB. Thus 0 is
0dB, 3283.048 cd/\(\mbox{m}^2\); 1 is 0.5dB; and 80 is 40dB, 10 cd
/ \(\mbox{m}^2\)
tracking is TRUE if auto image placement to keeppupil centred is
used, or FALSE to turn off imo auto-image placement to keep centred
on pupil.
x and y are in degrees (floating point) (range [-30,30]).
level is in cd/\(\mbox{m}^2\), and is rounded to the nearest
whole dB for display (range 0 to 50). 0dB is 10000aps.
responseWindow is in millliseconds (range 0 to 2680). Parameter
duration is assumed to be 200ms, size is assumed to be
Goldmann III (0.43), and color is assumed to be white.
# NOT RUN {
stim <- list(x=9, y=9, image=NA, 314, size=0.43, color="white",
duration=200, responseWindow=1500)
class(stim) <- "opiStaticStimulus"
# }
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