Send marker (insert codeline) when stimulus begins

Coding
1

Hi everyone! We need to insert the line

socket.annotation('130', 0.1)

into beginning of each stimulus presentation to send its marker to eyetracker.

In current routine there are 3 stimuli that start in different time.

aOO9e1yrPBI
aOO9e1yrPBI1280×342 49.9 KB

I suppose the codeline could be inserted into

if instruction_text.status == STARTED:

Automatically created code:

while continueRoutine:
# get current time
t = instructionClock.getTime()
tThisFlip = win.getFutureFlipTime(clock=instructionClock)
tThisFlipGlobal = win.getFutureFlipTime(clock=None)
frameN = frameN + 1 # number of completed frames (so 0 is the first frame)
# update/draw components on each frame

# *instruction_text* updates
if instruction_text.status == NOT_STARTED and tThisFlip >= 1-frameTolerance:
# keep track of start time/frame for later
instruction_text.frameNStart = frameN # exact frame index
instruction_text.tStart = t # local t and not account for scr refresh
instruction_text.tStartRefresh = tThisFlipGlobal # on global time
win.timeOnFlip(instruction_text, 'tStartRefresh') # time at next scr refresh
instruction_text.setAutoDraw(True)
if instruction_text.status == STARTED:
# is it time to stop? (based on global clock, using actual start)
if tThisFlipGlobal > instruction_text.tStartRefresh + 2-frameTolerance:
# keep track of stop time/frame for later
instruction_text.tStop = t # not accounting for scr refresh
instruction_text.frameNStop = frameN # exact frame index
win.timeOnFlip(instruction_text, 'tStopRefresh') # time at next scr refresh
instruction_text.setAutoDraw(False)

Probably you could suggest any other ideas? To check a time of stimuli presentation or anything else? Thank you in advance!

2

I think you’re on the right lines there. You would insert a code component and check every frame whether your stimulus has started.

#Every Frame

if *your_stimuli*.status == STARTED:
     annotation.socket(....)
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