Slider (using builder)

Builder
1

Hi!
I’m using the most updated version of Psychopy (v.2022.1.1). I’ve put a slider in my experiment using builder and I cannot get the slider itself to move - not with the mouse, keys, etc. I’d like to have it move using certain keys but I can’t figure out how to get it to move at all.

The ultimate goal is for it to move with the key press “a” — I’m doing an fMRI experiment and that’s the input we’ll get from the scanner button box. I would be so grateful for any help!

2

Strange that it won’t respond to any input, what operating system are you on?

To use the ‘a’ key to move the slider (in this example, adding +1 each frame the key is pressed) you would add a :keyboard: Keyboard component (let’s call it keys) to listen for key presses, then a :code: Code component with the following in its Each Frame tab:

if keys.getKeys(['a']):
    if slider.response is None:
        # If this is the first response, start at 1
        slider.response = 1
    else:
        # Otherwise, add 1
        slider.response += 1
3

Thanks for this feedback — I’m using a Mac OS (Catalina), not sure why it’s not moving at all!