Mouse click record selections and end routine on final “okay

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2

You are correct to de-select the “force end routine” setting, as that isn’t flexible enough for what you need. You will need to handle the response in code, so insert a code component in your routine, from the “custom components” panel. In its “begin routine” tab, put something like this:

# keep track of what/how many letters have been clicked:
clicked_letters = []

Then put something like this in the “each frame” tab so that clicks are monitored continuously throughout the trial:

if mouse.isPressedIn(your_okay_box_name) and len(clicked_letters) == 4:
    continueRoutine = False
else:
    # using your actual stimulus names, check each one for a click:
    for letter_stim in [letter01, letter02, ..., letter26]:
        # only respond if a letter has not already been clicked:
        if mouse.isPressedIn(letter_stim) and letter_stim.colour == 'black':
            letter_stim.colour = 'green'
            clicked_letters.append(letter_stim.text)

            if len(clicked_letters) == 4:
                # make the okay box look enabled
                your_okay_box_name.opacity = 1

Then something like this in the “end routine” tab to save the responses into four separate columns in your data file:

for i, letter in enumerate(clicked_letters):
    thisExp.addData('response_' + str(i), letter)

Give your text stimuli an initial colour (like black) and the okay box an initial opacity value of, say 0.5, and set each to “update every routine”. This allows them to be updated in code but then get re-set at the start of each trial.