RWG - Randomization Within Groups |
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QuickInfo DirectRT will randomly order and present all items sharing the same RWG value. Identical to the MediaLab function of the same name. Value Any positive integer value Details You may wish to randomly order and present trials within your questionnaire. To do this, assign the same RWG value in the wgr column to all the trials you want to have randomized with each other. For example, if you have five trials you want randomized, assign them each a "1". The five trials will be randomly presented in the five positions they occupy in the input file. All other trials will be presented in their normal positions as long as their RWG value is 0. You can independently randomize another group of items by assigning them all a "2", another group with "3's and so forth. **Note that unlike the RBG method, items do not need to be sequential to be assigned the same RWG value. Note for ease of analysis, trials are written to the data file in the order they occur in the input file, not in the randomized order in which they are presented. However an "Order" variable is also written to indicate the sequential order in which the trials actually occurred. Example See Samples, RWG See Also |