View source for PEBL Perceptual Vigilance Task
==Data Output== Data is saved to file ppvt-<gsubnum>.txt. Columns are: SubjectNum, Block, Trial, ISI, isibin, absolute_Time, RT, response_type Example data file looks like this: <pre> sub,block,trial,ISI,ISIbin,abstime,rt,type 33,1,1,9106.74,9000,6404,526,3 33,1,2,8029.24,8000,18446,10776,3 33,1,3,9109.36,9000,39664,620,3 33,1,4,8439.79,8000,51801,-5986,1 </pre> * sub is the subject code * block indicates the block of trials. By default there are 12 blocks, with 120 trials each. * trial is the overall trial counter (stimulus order) of the experiment * ISI is the inter-stimulus interval--the time since the previous stimulus * ISIbin rounds ISI to the nearest second (using floor) * abstime is the start-time of the trial. This is recorded in ms since the start of the experiment. * rt is the response time to the stimulus. A negative value indicates a too-fast result; it is recorded as the RT to the beginning of the trial, not the time prior to the stimulus that the response would have been given. * type is a response categorization. for trial type, 1=too fast, 2= OK, 3 = lapse (> 500 ms) 4 = sleep (>30 s) A summary of the results, with means and standard deviations across delays, is output to ppvt-report-<gsubnum>.txt.
PEBL Perceptual Vigilance Task
Retrieved from "
What links here
About PEBL WIKI