[open] how to randomize blocks?

Comments

• eduard

  March 2016 edited 7:27PM

  Hi Vesna,

  Welcome on the forum!

  Yes, randomization is possible with Opensesame (it would be a very poor experiment builder if not). The scenario you describe sounds like a pretty standard case, where it should be enough to set the order field, in the top right corner of the loop element to random rather than sequential.

  Does this make sense? Btw. If you wanna learn the basics of Opensesame, I recommend you have a look at the beginner's tutorial.

  Good luck,

  Eduard

  
• andersony3k

  April 2018

  I believe Vesna's question was about randomizing the order in which the blocks are presented (where each block includes its own loop of trials), not randomization within a loop of trials.

  R
• Art

  December 2019 edited December 2019

  Has this actually ever been implemented in Opensesame?
• eduard

  January 2020

  Hi,

  Not that I know, but it is not very hard to implement. Just write your block loops in Opensesame, set their run if fields to never. Then, in an inline_script you can create a list with the block_names, randomize it and run one at a time with this command:

   items.execute(u'my_block')
  

  Does that make sense?

  Eudard

  
• andersony3k

  January 2020

  The solution (without having to write code) was given to me some time ago in another thread: https://forum.cogsci.nl/discussion/4041/feature-request-allow-each-row-within-a-loop-to-run-different-sequence#latest

  Also, I've created a simple, working example (attached).

  Block Randomization Example.zip

  
  

  R