Analysis of Three-factor Designs (1 of 3)
A three-factor analysis of variance consists of seven significance tests: a test for each of the three main effects, a test for each of the three two-way interactions, and a test of the three-way interaction. Consider a hypothetical experiment investigating how well children and adults remember. There are three factors in the experiment:
- Type of test: Subjects are either asked to recall or to recognize
the stimuli. In the recall test, subjects are asked to state the names
of as many of the stimuli as they can. On each recognition test trial,
subjects are asked to pick out the one stimulus that had been presented
from a set of four stimuli.
- Age: 10-year old children and adults are compared.
- Type of stimulus: The stimuli to be remembered are presented either as pictures or as words.