[open] visual array experiment

Comments

• Edwin

  May 2014 edited 8:12AM

  Hi,

  You will not be able to do this using just the OpenSesame GUI, but you could use Python inline scripting to get the same result. So it will be a very good idea to learn some Python.

  A general approach could be the following:

  1) Specify the four image names using a loop, in four variables, named "img1", "img2", "img3", "img4".

  2) Use the following inline_script to randomize the order

  # import the random module
  import random
  
  # put all the image names into a list
  imglist = [exp.get("img1"), exp.get("img2"), exp.get("img3"), exp.get("img4")]
  
  # randomize the order of the list
  random.shuffle(imglist)
  
  # reset the image names
  exp.set("img1", imglist[0])
  exp.set("img2", imglist[1])
  exp.set("img3", imglist[2])
  exp.set("img4", imglist[3])
  

  3) Use a sketchpad to present the images, by referring to them by using the variable names in square brackets, like so (note that the following is OpenSesame syntax, from a sketchpad item!):

  draw image -96.0 -96.0 "[img1]" scale=1.0 center=1 show_if="always"
  draw image -96.0 96.0 "[img2]" scale=1.0 center=1 show_if="always"
  draw image 96.0 -96.0 "[img3]" scale=1.0 center=1 show_if="always"
  draw image 96.0 96.0 "[img4]" scale=1.0 center=1 show_if="always"
  

  Good luck!