URL of experiment: https://gitlab.pavlovia.org/smithle9/
Description of the problem: I’m working on a self-paced reading experiment in which participants read a sentence one word at a time, advancing to the new word by pressing SPACE. In the current code, the last word of each sentence does not appear. The experiment otherwise works great. Here is the Python in the “Every Frames” tab of the code component.
if len(kb) > 0:
if 'space' in kb[0]:
try:
nextWord = word_list.pop(0)
text.setText(nextWord)
except IndexError:
rtList.append(kb[0][1])
break
rtList.append(kb[0][1])
if len(word_list) == 0:
continueRoutine = False
Here is the JS:
kb = event.getKeys({"timeStamped": true});
if ((kb.length > 0)) {
if (_pj.in_es6("space", kb[0])) {
try {
nextWord = word_list.shift();
text.text = nextWord;
} catch(e) {
if ((e instanceof IndexError)) {
rtList.append(kb[0][1]);
} else {
throw e;
}
}
}
rtList.append(kb[0][1]);
}
if ((word_list.length == 0)) {
continueRoutine = false;
}
I’m think I’m having problems defining the .shift function properly to display each word.
Any advice would be greatly appreciated!
I think the issue is above: if this is the last word, then you pop it from the list and text.setText(nextWord) but now the list is empty, so you immediately exit the routine. At a guess, you should shift continueRoutine = False into your exception handler, so it triggers after the last word has been extracted and displayed. e.g. something like:
except IndexError:
rtList.append(kb[0][1])
continueRoutine = False
break
i.e. don’t exit the routine as soon as the list becomes empty, but when the space bar has been pressed and the list is already empty.
Hi Michael,
Thank you for your suggestion! It works now and displays each word.
However, now I have the same issue I discussed in a previous post; that is, after the words display, a blank screen appears. I think this means that the routine is not ending, so the following “image” routine which is supposed to show participants a set of images does not display.
It was suggested to me by @wakecarter that I should to clear the keyboard buffer, for example in End Routine of my code component, but nothing seems to happen if I use the clearEvents function.
Do you have any suggestions on how to resolve this?
Thank you again for your help!
If it’s displaying each word but no images then there can’t be an issue with the word routine ending. It’s running multiple times. Please show any code and components related to the image presentation.
Gotcha. Here are the components for the image presentation routine:
Stim_resp refers to the keys that participants press to choose the image (‘a’ or ‘b’).
Stim_image is the image:
And, here is the trial_loop.
Thanks!
Hi,
I thought it might be helpful to add that the image presentation works fine in the Builder, and the experiment runs as intended.
I’ve also included the python code for the image presentation:
# ------Prepare to start Routine "image"-------
continueRoutine = True
# update component parameters for each repeat
stim_image.setImage(stim)
image_key.keys = []
image_key.rt = []
_image_key_allKeys = []
# keep track of which components have finished
imageComponents = [stim_image, image_key]
for thisComponent in imageComponents:
thisComponent.tStart = None
thisComponent.tStop = None
thisComponent.tStartRefresh = None
thisComponent.tStopRefresh = None
if hasattr(thisComponent, 'status'):
thisComponent.status = NOT_STARTED
# reset timers
t = 0
_timeToFirstFrame = win.getFutureFlipTime(clock="now")
imageClock.reset(-_timeToFirstFrame) # t0 is time of first possible flip
frameN = -1
# -------Run Routine "image"-------
while continueRoutine:
# get current time
t = imageClock.getTime()
tThisFlip = win.getFutureFlipTime(clock=imageClock)
tThisFlipGlobal = win.getFutureFlipTime(clock=None)
frameN = frameN + 1 # number of completed frames (so 0 is the first frame)
# update/draw components on each frame
# *stim_image* updates
if stim_image.status == NOT_STARTED and tThisFlip >= 0.0-frameTolerance:
# keep track of start time/frame for later
stim_image.frameNStart = frameN # exact frame index
stim_image.tStart = t # local t and not account for scr refresh
stim_image.tStartRefresh = tThisFlipGlobal # on global time
win.timeOnFlip(stim_image, 'tStartRefresh') # time at next scr refresh
stim_image.setAutoDraw(True)
# *image_key* updates
waitOnFlip = False
if image_key.status == NOT_STARTED and tThisFlip >= 0.0-frameTolerance:
# keep track of start time/frame for later
image_key.frameNStart = frameN # exact frame index
image_key.tStart = t # local t and not account for scr refresh
image_key.tStartRefresh = tThisFlipGlobal # on global time
win.timeOnFlip(image_key, 'tStartRefresh') # time at next scr refresh
image_key.status = STARTED
# keyboard checking is just starting
waitOnFlip = True
win.callOnFlip(image_key.clock.reset) # t=0 on next screen flip
win.callOnFlip(image_key.clearEvents, eventType='keyboard') # clear events on next screen flip
if image_key.status == STARTED and not waitOnFlip:
theseKeys = image_key.getKeys(keyList=['a', 'b'], waitRelease=False)
_image_key_allKeys.extend(theseKeys)
if len(_image_key_allKeys):
image_key.keys = _image_key_allKeys[-1].name # just the last key pressed
image_key.rt = _image_key_allKeys[-1].rt
# was this correct?
if (image_key.keys == str(correct)) or (image_key.keys == correct):
image_key.corr = 1
else:
image_key.corr = 0
# a response ends the routine
continueRoutine = False
# check for quit (typically the Esc key)
if endExpNow or defaultKeyboard.getKeys(keyList=["escape"]):
core.quit()
# check if all components have finished
if not continueRoutine: # a component has requested a forced-end of Routine
break
continueRoutine = False # will revert to True if at least one component still running
for thisComponent in imageComponents:
if hasattr(thisComponent, "status") and thisComponent.status != FINISHED:
continueRoutine = True
break # at least one component has not yet finished
# refresh the screen
if continueRoutine: # don't flip if this routine is over or we'll get a blank screen
win.flip()
# -------Ending Routine "image"-------
for thisComponent in imageComponents:
if hasattr(thisComponent, "setAutoDraw"):
thisComponent.setAutoDraw(False)
trials.addData('stim_image.started', stim_image.tStartRefresh)
trials.addData('stim_image.stopped', stim_image.tStopRefresh)
# check responses
if image_key.keys in ['', [], None]: # No response was made
image_key.keys = None
# was no response the correct answer?!
if str(correct).lower() == 'none':
image_key.corr = 1; # correct non-response
else:
image_key.corr = 0; # failed to respond (incorrectly)
# store data for trials (TrialHandler)
trials.addData('image_key.keys',image_key.keys)
trials.addData('image_key.corr', image_key.corr)
if image_key.keys != None: # we had a response
trials.addData('image_key.rt', image_key.rt)
trials.addData('image_key.started', image_key.tStartRefresh)
trials.addData('image_key.stopped', image_key.tStopRefresh)
# the Routine "image" was not non-slip safe, so reset the non-slip timer
routineTimer.reset()
thisExp.nextEntry()
# completed 2 repeats of 'trials'
Thank you again!
I assume that that’s compiled code. What about your code components?
Yes, that’s the compiled code! I don’t have code components for the image routine because I didn’t need it to run the experiment on PsychoPy.
Do you have any variable components or code in the other components?
In the “image” routine, don’t have any code in the other components. The only thing I have is the images being pulled from the conditions file.
I do have a code component for the previous “word” routine, but not for the image presentation routine.
