It has been suggested that pupil size increases during emotional arousal. A researcher would, therefore, like to see whether the increase in pupil size is a function of the type of arousal (pleasant versus aversive). A random sample of five participants is selected for the study. Each participant views all three stimuli: neutral, pleasant, and aversive photographs. The neutral photograph portrays a plain brick building. The pleasant photograph consists of a young man and woman sharing a large ice cream cone. Finally, the aversive stimulus is a graphic photograph of an automobile accident. Upon viewing each stimulus, the pupil size is measured (in millimeters) with sophisticated equipment. The data are as follows. Use it to test whether pupil size varies based on type of arousal.

	Stimulus
Participant	Neutral	Pleasant	Aversive
A	4	8	3
B	3	6	3
C	2	5	2
D	3	3	6
E	3	8	4

1. In this specific scenario, what is the independent variable? Is it between or within subjects? How many levels does it have, and what are they?

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1. Paste all relevant statistical output in the space provided below:

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an appropriate graph in SPSS and paste it in the space provided below:

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1. This includes a full write-up to include a complete statistical notation as shown in the weekly presentations. The write-up also needs interpretation. If significant, state how. If it is not significant, what does that mean in layman's terms?

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