Image selection based on response rates

Builder
1

Hello, I am working on a task on Windows 10 using v.2021.2.3
The goal seems pretty simple - the task is a little long, (1 1/2 hours), so we have periodic breaks. Currently, I have the code set up to give breaks after every 72 trials. During these breaks, I provide feedback to the participants on how well they are doing. Right now, I just have the number of answers they’ve gotten correct out of the total number of trials for that block, (e.g., 68 / 72 correct). I also want to add an image that is a face that is smiling if they are doing better than 80% accuracy or frowning if they are doing worse than 80% accuracy. I already have a ‘counter’ going, where my variable ‘num_corr_sec’ totals how many trials they have gotten correct for that block.

The only idea I had so far was to add both images to the feedback section, and set their opacity to zero. Above that, I added a code that does this:
if num_corr_sec >=58:
Face1st.opacity = 1
elif num_corr_sec <58:
Face5th.opacity = 1

where Face1st is the ‘happy face’ and Face5th is the ‘sad face’. Although there were no errors in the code, neither of the faces appeared, regardless of how well I did. I figure I probably need a different approach - what can I do instead?

2

Are you writing inside Each Frame？

Would you like to share your experiment here for me to check？

3

image
image1605×502 9.21 KB

Here is what the entire feedback (“rest”) period looks like,

image
image989×599 12.4 KB

here is the code at the top that is designated for changing the opacity of the faces.

Let me know if there is anything else I can show you that would be helpful! thank you!

4

The code looks like it should be in Begin Routine of the feedback routine. Please could you show the code that controls the variables mentioned?

5

here’s the direct code for those face1st and face5th variables:

Face1st_p = visual.ImageStim(
win=win,
name=‘Face1st_p’,
image=“stimuli/react_feedback/1st”, mask=None,
ori=0.0, pos=(0, 0), size=(0.5, 0.5),
color=[1,1,1], colorSpace=‘rgb’, opacity=None,
flipHoriz=False, flipVert=False,
texRes=128.0, interpolate=True, depth=-5.0)
Face5th_p = visual.ImageStim(
win=win,
name=‘Face5th_p’,
image=“stimuli/react_feedback/5th”, mask=None,
ori=0.0, pos=(0, 0), size=(0.5, 0.5),
color=[1,1,1], colorSpace=‘rgb’, opacity=1.0,
flipHoriz=False, flipVert=False,
texRes=128.0, interpolate=True, depth=-6.0)

Although I’m not sure why the opacity look different, as I set them up identically. Here’s screenshots from the builder:

image

image

6

Also, here is the code for the ‘counter’ - that keeps track of the number of correct responses (It only let me uploaded 2 images at a time, apologies for the double message):

Screenshot 2022-03-05 103845
Screenshot 2022-03-05 1038451359×811 32.9 KB

(the top part is for initially setting up each variable of interest, the bottom part is where I reset the count for each block)

image
image1358×205 8.26 KB

and here is the code that updates the # of correct counts for each correct response. I know this part works, since I display this at each feedback rest period, and that is working fine.

Just to note, I tried moving the first code I presented to the ‘Begin Routine’ section, and it was not showing up still. (here I am referring to the following code)
if num_corr_sec >=58:
Face1st.opacity = 1
elif num_corr_sec <58:
Face5th.opacity = 1

Hopefully I covered everything here but do let me know what other info you might need! thanks in advance!

7

If you reset the opacity to 0 every frame it will never be visible. Either set it to 0 constant or a variable every frame.

8

y’know that makes perfect sense… working great now. Thank you for your time and assistance!