StatLab 8a: 2-Factor Anova for independent groups
A researcher wanted to investigate if there is any effect of level of motivation and/or task difficulty
on task performance. He decided to use three types of incentives to manipulate participants’ motivation (i.e.,
three levels of motivation = low, medium and high) and he prepare two tasks that differ in levels of difficulty
(easy and difficult). Participants were randomly assigned to one out of six experimental conditions and their
performance on the task was measured.
The obtained data are listed below. Is there any evidence that
motivation and/or task difficulty produced a significant effect on task performance?
Task: EASY 3,1,1,6,4
Open SPSS &
make a new data file
You should create 3 columns on your data sheet because you have 2 independent variables (each IV
gets its own column) and 1 dependent variable.
Name the first column of the data spreadsheet