Repeated Measures ANOVA
A repeated measures ANOVA is used under three scenarios. The first is when the same participants take part in an experiment with two or more conditions. The second is when when the same participants are measured on the same continuous scale on three or more occasions. Finally, you should also use a repeated measures ANOVA when you want to compare respondents’ responses across two or more different questions or items (the questions must measured using the same scale).
Video Example: In this video, students participated in a program designed to increase their confidence in performing statistics. Their confidence levels were measured over three time periods, before the program, at the end of the program and three months after the completion of the program. We want to know if there is a significant difference in the mean confidence scores across the three time periods.
Video Data File: experim3JM.sav
This Video Clip: 7 minutes and 38 seconds
You can increase the size of the video by clicking on the square on the bottom right hand side of the video.