PsychoPy version (e.g. 2020.2.10):
Standard Standalone? (y)
What are you trying to achieve?:
In my experiment, participants must ‘produce’ a ‘flower stem’ (see image) by pressing the mouse. So, basically, the green part of the flower will increase in size, but only in length, and only downwards!.
What did you try to make it work?:
Right now I can increase the height of the stem, but it increases on both ends, so that’s no good. I tried to adjust the position of the midpoint of the stem while the stem ‘grows’, but I couldn’t get that to work. My experiment screen settings are set to pix.
I also tried to draw a green rectangle (that’s basically what it is) by using Shapes, but that wouldn’t appear on the screen.
What specifically went wrong when you tried that?:
For the first ‘solution’ (i.e. change the position of the image while it increases) i get “ValueError: Invalid parameter. Single numbers are not accepted. Should be tuple/list/array of length 2”
Surely there’s an easy way to fix this, but I can’t seem to work it out. Any help is much appreciated!