Randomize Within Group (Experiment File)

QuickInfo

Randomly orders and presents all files sharing the same RWG value.

Value

Any positive integer value

Purpose

You may wish to randomly order and present certain files in your experiment. To do this, assign the files you want to have randomized with the same number in this field. For example, if you have five files you want randomized, assign them each an RWG value of 1. The five files will be randomly presented in the five positions they occupy in the experiment. All remaining files will be presented in their normal positions as long as their RWG value is either 0 or none. You can independently randomize another group of items by assigning them all a 2, another group with 3s and so forth.

Example

In one condition, you want to present 1) Word document, 2) five images randomly ordered, 3) five sounds randomly ordered, and 4) a final Word document. Assign an RWG value of "0" or none to the Word documents to keep them where they are, a "1" to the five images, and "2" to the five sounds. That's it. To randomize the order that groups of files are presented (e.g., whether the images or the sounds are presented first),see Randomize Between Groups .

Hints

Typically, randomization is used mainly in questionnaires rather than at the experiment level since data is only collected in questionnaires. However, the functionality is there if you need it.