Specific parameters and return values can be seen in the machine specific versions listed below in the ’See Also’.
opiPresent(stim, ...)Each implementation should(!) return a list with at least the following elements:
err NULL if no error, otherwise a string describing the error.
seen TRUE if stimulus seen, FALSE otherwise
time Response time from onset of stimulus in milliseconds.
A stimulus object or list as described for each machine in the 'See Also' methods.
Other arguments that might be needed by each machine in the 'See Also' methods.
opiPresent_for_Compass(),
opiPresent_for_Octopus900(),
opiPresent_for_ImoVifa(),
opiPresent_for_PhoneHMD(), opiPresent_for_Display(), opiPresent_for_PicoVR(),
opiPresent_for_SimNo(), opiPresent_for_SimYes(), opiPresent_for_SimHenson(),
opiPresent_for_SimHensonRT(),
opiPresent_for_SimGaussian()