octo900.presentStatic {OPI}

Present static on O900 (internal use)

Description

Implementation of opiPresent for the Octopus090 machine. Version for opiStaticStimulus.

This is for internal use only. Use opiPresent() with stim as class opiStaticStimulus and you will get the Value back.

Arguments

stim

Stimulus to present (a list, see details).

nextStim

The stimulus to present after stim (it is not presented, but projector can move to it during response window)

F310

If F310 is FALSE, response is taken from internal button. If F310 is TRUE , response is taken from external controller

Details

stim is a list containing at least the following 3 elements:

• x, x-coordinate in degrees (floating point) (range $[-30,30]$).

• y, y-coordinate in degrees (floating point) (range $[-30,30]$).

• level is luminance in cd/\mbox{m}^2, and is rounded to the nearest whole dB for display (range 0 to 50). 0dB is 10000aps.

It can also contain:

• responseWindow from start of stimulus presentation in milliseconds (default is 1500).

• duration of stimulus on in milliseconds (default 200).

• color one of .opi_env$O900$STIM_WHITE, .opi_env$O900$STIM_BLUE or .opi_env$O900$STIM_RED. It must be same as that initialised by opiSetup() or opiInitialize() (default .opi_env$O900$STIM_WHITE).

• size of stimulus diameter in degrees (default Size III == 0.43). This is rounded to the nearest support Goldmann size.

If responses are taken from the F310 Controller then

• If the L button is pressed, seen is set to 1.

• If the R button is pressed, seen is set to 2.

• If no button is pressed within responseWindow, then seen is set to 0.

If stim is null, always return err = NULL status.

Value

A list containing

• err String message or NULL for no error.

• seen 1 if seen, 0 otherwise. (See details for F310)

• time Reaction time (if seen).