Setting slider labels from Begin Routine

[K_Gish]

I want to set the labels for a slider from a line in Begin Routine. As far as I can tell, this is how to do it but it doesn’t work.

slider.labels = (“option1”,“option2”)

I have tried a lot of different combinations and nothing works.

I have even tried commands show here

Bug: customizing slider labels/ticks in js does not update at beginning routine (keeps previous trial spacing for # labels)

Hi Sawal, Sorry for the silence; I’ll raise this issue with someone that has more knowledge of the slider component than I do. I do have something else that might be useful for you. The experiment below illustrates how to embed form.io forms inside of PsychoJS. This way you’ve got a free and open source system for surveys at your disposal that rivals Qualtrics in it’s feature set. See the README for instruction on how to plugin your own questionnaire. Best, Thomas

and here

Changing values for slider ticks and labels in loop

**Win10 **PsychoPy version 3.07 I want to create a loop in which the subject responds to questions via a slider. However, the slider should have different ticks and labels for each iteration. I.e. for four of my five questions, it should be a scale from 1 to 7 with the labels ‘Strongly disagree’ and ‘Strongly agree’ at its outer ends, and the last one should have a scale with only 1 and 2 on it with the labels ‘no’ and ‘yes’. All the five questions shall be shown in random order, so all of th…

Is this even possible? Is there a glitch? Please help ASAP.

[Chen]

Hello,
Did you try accessing directly to the class?
For example:

slider = visual.Slider(win, labels= ("option_1", "option_2"))

https://www.psychopy.org/api/visual/slider.html#psychopy.visual.Slider

[K_Gish]

Chen,

Thanks for the prompt response. Based on your suggestion, I put the following line in the Begin Routine tab of a code component (in Python window). My slider name is item1.

item1 = visual.Slider(win, labels = (“option1”,“option2”))

Let me know if I did something wrong. All I get is a blank page but when I click on the page (roughly where the radio buttons should be) I get a big red dot but there are no labels.

[Chen]

Hey,
Is item1 the name of your slider in the builder?
If not, can you please share the experiment you are working on? Maybe only with the relevant part.

Thanks

[K_Gish]

Chen,

It works! The reason the text wasn’t showing up is that I am using a white background. When using your win method, it sets to defaults for ticks and color regardless of what is set in builder.

Can you explain why your method works and why my original method did not? If I use your method, it seems like I am bypassing builder so I’ll have to use a bunch of other lines to set colors, ticks, etc.

Thanks for helping with this.

Ken

[Chen]

Hello Ken,
In your original method, did you set the color of the text to be different than the color of your background? I wasn’t sure if this is something you found out accidentally using my method or if it’s something else.

I also tried replicating your method, and I am unsure why it doesn’t work. I tried accessing the labels through an external variable, in a spreadsheet, but nothing seemed to work.
It seems like updating the label after initializing it is problematic.

How to set slider values to variable from .xlsx?

Deleting the dollar did not work How would I go about splitting it in code and using the new list in the component? I do not quite understand.

Update slider labels in every trial

Hello, thanks for your answer. I solved it “manually”, defining a text component for each position and leaving the text as variables on the stimuli file (xlsx). But I’ll look into this solution also! Regards.

[K_Gish]

@K_Gish

slider.labels = (“option1”,“option2”)

No. I had the color set to black for labels via builder. However, I just noticed that there was an error in the JS version. Using single quotes at least got rid of that error but it still didn’t work. I even tried putting this line in Each Frame tab. That didn’t work either.

item1.labels = (‘option1’,‘option2’)

I guess in future I will be forced to use your method. Hopefully someone can figure this out.

[Chen]

I couldn’t find a better solution than manually creating the slider through code. I hope someone else find a better solution because the current one is not trivial.