Participants cannot select 0 values in slider

Builder
1

Win11
PsychoPy 2022.2.4
Standard Standalone? (y)
**What are you trying to achieve?:
I have a working experiment that runs smoothly with a 0-100 slider:

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While performing a pilot, participants complained that they could not select 0 values on the slider presented. They had to select another point in the scale and then click back on the 0 value so that the program allows them to select such an answer.

I have no idea what is happening or what to do to make it work correctly. I am afraid participants will refrain from choosing “0” answers just because psychopy does not seem to assume such an answer when given as first choice.

Does anyone have a clue about what could be happening?

Many thanks!
Mariana

2

Hi @Mariana_FPCEUP,

I’ve just set up a slider with the same settings as you’ve got here and I can select 0 straight away (see example). Could you please confirm which slider style you’re using, i.e. ‘rating’, ‘radio’ etc?

Thanks,

Kim
slider_0.psyexp (8.9 KB)

3

Hi @Kimberley_Dundas !

Thank you for your replay and example!
Indeed, your script does seem to work where my does not. I’ve created a copy including only the slider, which I am sending now. I now notice these warnings on the stdout:
WARNING: Requested display index does not exist. Using display index 0.
5.0420 WARNING Requested an unavailable screen number - using first available.

test.psyexp (20.7 KB)
valencetype_list.xlsx (8.0 KB)

4

Hi Mariana, :slightly_smiling_face:

I don’t know what the cause of your problem is but I tried something on your experiment and it seems to work fine, so try it yourself:

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Imbar.

5

Hi @Imbar_Mizrahi!

Thank you. Unfortunately, it does not seem to work for me.
I wonder if it is something to do with my settings…
[I now know that the warnings I previously shared were not related to this issue (sorry for the noise there).]
@Becca , do you have any idea what could be happening?

Thanking you in advance

6

Hi Mariana,

Sorry but I am struggling to replicate this I am running PsychoPy 2022.2.4 on a Windows 10 (the OS version is the only possible difference as I understand it). When I download your test.psyexp and spreadsheet I can select 0 no problem. Have you tried this on any other device where it does work?

Becca

7

Hi Becca,

Thank you for your reply.
I have tried it on another device with Win10 and I have the same problem: I cannot proceed to the following question (by clicking on the tab) if I try to select a zero value (please see the video attached). Do you confirm that you can select 0 as the first choice, click tab and go to the next question on your device without any issues?

Many thanks

8

I’m on my phone so can’t download your code. What do you use to detect a response and end the routine? I’m wondering whether you’ve put >0 somewhere.

9

Hi Wakecarter, thank you,

That is one of my previous thoughts too… But I don’t think I did as you can see below:

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This is really puzzling because if I change the minimum to -10, it accepts -10 and 0s just fine… The problem is only if the minimum 0 is set to 0.

10

Try baseline_slider_valence.markerPos as your condition. The issue is that a rating of 0 is False for your condition.

11

Unfortunately, baseline_slider_valence.markerPos as the condition does not solve the problem. However, if I remove the condition of selecting a value on the slider,

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it becomes possible to select 0s. So it solves one problem but creates a new one: participants are now allowed to move to the next question without giving a response.

12

I am actually having this same exact issue, except I am coding it where I am doing:

if response_key and slider.getRating():
    continueRoutine = False

Did you ever figure out the solution? I find that if I just have a slider I can select 0 and move on, but when I introduce a key component, 0 will be selected, but it just wont move on to the next routine.