Intro to Research Methods Lecture 5 13-02-14 7:24 PM
• Occurs when the effect of one IV depends on the level of another
Remember: Factorial Design means there is more than one IV involved.
**SHORT ANSWER for Test 2:Look at a matrix and come up with the
corresponding graph; or a graph and come up with corresponding matrix.** Interaction Effects
Ceiling Effect (Appears as Interaction Effect, but does not display an
opportunity to get a higher score, causing a misinterpretation of data) (i.e.
only having 40 questions on a test and first IV getting consistent 40 but no
opportunity to improve)
Ceiling Effect- this occurs when scores on 2 or more conditions are near the
maximum, it can give the impression that no differences exist between
Floor Effect (a group cannot get any lower) (i.e. the first group
regarding behaviour may not be able to possibly get any lower than zero
after a treatment, so can be misinterpreted)
AxBxC *most important to publish because it shows an overall reaction
**Will NOT be tested on any statist