OS (e.g. Win10): Windows 10
PsychoPy version (e.g. 1.84.x): 2020.1.3
Standard Standalone? (y/n) If not then what?: yes
Hi all,
I was trying to build a self-paced reading task from scratch. To do so, I followed all the instructions from the thread created on the Google Forum and the older posts on this forum. I inserted the code in the required tabs to mask the sentences and collect the inter response interval (IRI) every time the subject presses the space bar. Then, I tried to run the experiment: everything worked fine, except for the collection of IRIs. In my data file, the only registere IRI value is called IRI_0, and I think it refers to the first time the space bar is pressed, at the very beginning of every loop. I created an Excel file which contains 3 cells, each of them containing one sentence, all under the same column called “sentence”. Here’s the code I inserted in the trial Routine:
*Begin Experiment Tab*
# now define a function which we can use here and later on to replace letters with '-':
def replaceWithdash(textList, currentWordNumber):
dashSentence = ''
for index, word in enumerate(textList): # cycle through the words and their index numbers
if index != currentWordNumber:
dashSentence = dashSentence + '-' * len(word) + '-' # add two strings of dash characters
else:
dashSentence = ' ' + dashSentence + word #except for current word
return dashSentence # yields
*Begin Routine Tab*
# remove any keypresses remaining in the buffer from
# before this routine started:
event.clearEvents()
#this breaks your sentence's single string of characters into a list of individual
#words, e.g. 'The quick brown fox.' becomes ['The', 'quick', 'brown', 'fox.']
sentenceList = sentence.split()
#keep track of which word we are up to:
wordNumber = -1 #-1 as we haven't started yet
# now at the very beginning of the trial, we need to run this function for the
# first time. As the current word number is -1, it should make all words '-'.
# Use the actual name of your Builder text component here:
sentences.text = replaceWithdash(sentenceList, wordNumber)
# In the Builder interface, specify a "constant" value for the text content, e.g.
# 'test', so it doesn't conflict with our code.
*Each Frame Tab*
keypresses = event.getKeys() # returns a list of keypresses
if len(keypresses) > 0: # at least one key was pushed
if 'space' in keypresses:
thisResponseTime = t #the current time in the trial
wordNumber = wordNumber + 1
if wordNumber < len(sentenceList):
if wordNumber == 0: #need to initialise a variable
timeOfLastResponse = 0
#save the inter response interval for this keypress,
#in variables called IRI_0, IRI_1, etc:
thisExp.addData('IRI_'+str(wordNumber), thisResponseTime - timeOfLastResponse)
timeOfLastResponse = thisResponseTime
#update the text by masking all but current word
sentences.text = replaceWithdash(sentenceList, wordNumber)
else:
continueRoutine = False #time to go on to the next trial
elif 'escape' in keypresses:
core.quit() # I think you'll need to handle quitting manually now.
Can somebody help me, please? I’m kind of stuck at this point 
Thank you in advance!
