Mixed factorial design - An example
Interface style - picture Interface style - text
Trials, 1,2,3,4. Trials, 1,2,3,4.
efficient where carry-over effect are not great and where measurement
of learning performance is important
complicated when many input variables involved (in this example,
two kinds of input variables: Interface Styles[picture, text] (between
groups), and trials[1,2,3,4] (within group or repeated measure).