still randomizing the position of images

Comments

• eduard

  July 2021

  Hi,

  
  

  1) to present the [face_nr]EMOTION.tif in a random order from left to right and

  This you can achieve but not only code the emotion as a variable in your experiment, but also the position. In the easiest way, you can completetly counterbalance it in the loop table (see for example the beginner's tutorial where this is also done).If this is not feasible for whatever reason, you can randomly assign the positions in an inline_script (prepare phase) before the sketchpad. Something like this will do:

  import random
  position_x = [-300, -100, 100, 300 ]
  random.shuffle(position_x)
  var.x1, var.x2, var.x3, var.x3 = position_x
  

  Then you can also change the value in your screenshot to [x1], [x2], [x3], [x4] as x coordinate.

  2) to log the correct response.

  You must link the location of the emotion to the location of the correct response. For this you need to know where each emotion was placed. With the code above, I don't think you have control over the location. It might make more sense, to not shuffle the x positions, but shuffle the image identity. Same principle:

  import random
  face_id = ['[face_nr]NE.tif','[face_nr]AF.tif','[face_nr]HA.tif','[face_nr]SA.tif' ]
  random.shuffle(face_id)
  var.face1, var.face2, var.face3, var.face4 = face_id
  

  Now you only need to collect the response (1, 2, 3, or 4) and check which emotion was coded at that position (coded in var.faceX). If this label matches the predefined condition, you have a correct response and an incorrect response otherwise.

  Eduard

  
• spadan

  September 2021

  Dear Eduard,

  it was a bit harder than expected but we did it, thank you very much !
• eduard

  September 2021

  Good to hear!