Before you begin the assignment:
• Read Chapter 14 in your Discovering Statistics Using IBM SPSS Statistics textbook.
• Review the video tutorial for an overview of conducting repeated measures analyses in SPSS.
• Download and open the Snake Anxiety SPSS dataset.
An overview of the dataset:
This dataset represents hypothetical data from a study that examined the level of anxiety that people with a snake phobia felt in three different scenarios. The same people were tested in each scenario. That is, each person experienced all three conditions.
Here is some more information about the variables in this hypothetical dataset:
• Number: This is the ID number of the participant
• See_Distance: This is participants' anxiety (scores could range from 40 to 100, with high numbers indicating higher anxiety) when they saw a large snake that was about 20 feet away.
• See_Close: This is participants' anxiety (scores could range from 40 to 100, with high numbers indicating higher anxiety) when they saw a large snake that was about 5 feet away.
• Touch: This is participants' anxiety (scores could range from 40 to 100, with high numbers indicating higher anxiety) when they touched a large snake.
Questions:
1) Briefly explain in your own words the difference between a between-subjects design and repeated measures design.
2a) Examine the means of the three anxiety conditions.
2b) Describe the differences that you see between the means.
3a) Conduct a dependent samples t-test on See_Distanceand See_Close.
Paste output below (Read carefully: The best way to do this is to select "Copy Special" when copying from the SPSS output. Then select image as a format to copy. When pasting in Word, select Paste Special, choose a picture format, and then resize the image so it fits the screen):
3b) Report the results of this test in APA style. Refer to the "Repeated-measures T-test" section of this webpage.
4) Make up and describe a specific experiment that would call for a repeated measures ANOVA. Be sure to describe each level of the independent variable(s) and to describe the dependent variable. Explain why a repeated measures ANOVA would be necessary for this experiment.