Randomize Between Groups (Experiment File)

QuickInfo

All files sharing the same RBG value define a group to be kept together. If multiple groups are defined, then MediaLab will present them in a random order.

Value

Any positive integer value

Purpose

You may wish to randomly order and present entire groups of files in a given condition (e.g., randomizing whether personality questionnaires or demographic questionnaires come first) . To do this, assign the same RBG value to all of the items you want to keep together. For example, if you have three groups of ten files in one condition, and you want to randomize the order in which these 3 sets of files are presented, then assign each group a different number and make sure all the files within each group share the same number for that group. The files within each group will all stay together, but the groups themselves will be randomly ordered. All files assigned a 0 or none will not move. Note that all files within a group must be sequential in the given condition.

Example

In one condition, you want to present a Word document, five randomly ordered sets of five images, and a final Word document. Assign a value of "0" or none to the Word documents to keep them where they are, a "1" to the images in the first set, a "2" to the images in the second set, and so forth. That's it. To randomize the order that the files are presented within each group, see Randomize Within 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.