Changing the position of the slider during a loop

[shirel]

Hi I’m trying to do a simple thing but without success.
Stimuli are displayed in a loop and after each stimulus a slider appears. I want its position to change randomly (3 states): (0, -350), (120, -350), (-120, -350) (in pixels).
At first I added an excel file with the ‘location’ variable but it didn’t pick up the variable.
After reading other people’s questions I wrote in the code (in begin routine):
posM = (0, -350)
posR = (120, -350)
posL = (-120, -350)

locs = (posM, posR, posL)
shuffle(locs)

thisExp.addData(‘locs’, locs)

Is the code correct? What should I write in ‘position’ in the slider?
Thanks!

[JensBoelte]

Hello,

It seems that the Slider is still bugged when it comes to setting the Position-parameter. As soon as you set the Position-parameter to “set every repeat” from constant, the position will be set to [0,0], no matter what you want it to be. You can check this by looking at the compiled Python script.

set every repeat

slider = visual.Slider(win=win, name='slider',
    startValue=None, size=(1, .1), pos=[0,0], units=None,
    labels=[1,2,3,4,5], ticks=(1, 2, 3, 4, 5), granularity=1.0,
    style='rating', styleTweaks=(), opacity=None,
    labelColor='LightGray', markerColor='Red', lineColor='White', colorSpace='rgb',
    font='Open Sans', labelHeight=0.05,
    flip=False, ori=0.0, depth=-1, readOnly=False)

should be

slider = visual.Slider(win=win, name='slider',
    startValue=None, size=(1, .1), pos=(0, -.2), units=None,
    labels=[1,2,3,4,5], ticks=(1, 2, 3, 4, 5), granularity=1.0,
    style='rating', styleTweaks=(), opacity=None,
    labelColor='LightGray', markerColor='Red', lineColor='White', colorSpace='rgb',
    font='Open Sans', labelHeight=0.05,
    flip=False, ori=0.0, depth=-1, readOnly=False)

see here for an earlier mentioning of the problem

Bug report: Slider component position & clickability

OS (e.g. Win10): Mac OX 10.14.4 PsychoPy version (e.g. 1.84.x): 3.1.0 **Standard Standalone? YES I have identified 2 problems with the builder slider component, both when in use as radio buttons: a) when you set the stimPos to update on repeat (i.e. variable), this does not translate over to coder – the script does not represent this and simply has [0,0] pos in the original initialization, but then does not put in code before the trial runs. TextStims whose pos is similarly determined DO upd…

or see here

BF: Allow Slider to accept values each repeat

but according to this is issue is closed. So, it should work.

I’ve been using 2022.2.5, perhaps 2023.1.2 does a better job.

Best wishes Jens

[shirel]

Thanks for the response!
We have not reached a solution yet.
We tried to think of another way - we added 3 sliders with different positions, and in the code we wrote that only one would appear in each routine.
However, the three sliders appear together.
We would appreciate it if you have an idea what is wrong in the code,
Thanks!

Begin Experimant:
sliders = (‘sliderCenter’, ‘sliderLeft’, ‘sliderRight’)
slidersList = (‘sliderCenter’, ‘sliderLeft’, ‘sliderRight’)
slidersList = ()

Begin Routine:
if Routine.thisN == 0:
sliderCenter.started = 1
sliderLeft.started = 0
sliderRight.started = 0

elif Routine.thisN == 1:
sliderCenter.started = 0
sliderLeft.started = 1
sliderRight.started = 0

elif Routine.thisN == 2:
sliderCenter.started = 0
sliderLeft.started = 0
sliderRight.started = 1