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Home , Edward Norton

Overall ratings for and Edward Norton movies after (#5163)

Author(s) Created: 08/15/2017 10:52 AM (PT) Luis Anunciação (PUC-Rio) - [email protected] Public: 08/15/2017 10:53 AM (PT)

1) What's the main question being asked or hypothesis being tested in this study? The overall rating for Brad Pitt is higher than the overall rating for Edward Norton. Both actors starred Fight Club. To accomplish this hypothesis, data will be collected from IMDB public database considering all movies both actors starred after Fight Club. The mean difference of rating will be the dependent variable (DV).

2) Describe the key dependent variable(s) specifying how they will be measured. Simple mean of IMDB public rating for Brad Pitt and Edward Norton.

3) How many and which conditions will participants be assigned to? For this analyze, once I'm assuming a difference between ratings, power prior analysis was made considering d=0.8, alpha = 0.1, power = 0.9 and allocation ratio of 1/1 to calculate the minimum sample size necessary to detect a difference. The total sample will be formed by 42 movies (21 each).

4) Specify exactly which analyses you will conduct to examine the main question/hypothesis. Descriptive statistics will be reported and all data will be analyzed with independent t-tests considering one tail. The significance level (type I error) will be fixed at 0.1. Cohen's d will be estimated as well.

5) Any secondary analyses?

6) How many observations will be collected or what will determine sample size? No need to justify decision, but be precise about exactly how the number will be determined.

42 movies (21 each).

7) Anything else you would like to pre-register? (e.g., data exclusions, variables collected for exploratory purposes, unusual analyses planned?)

8) Have any data been collected for this study already? No, no data have been collected for this study yet

Available at https://aspredicted.org/nx74k.pdf Version of AsPredicted Questions: 1.05 (Permanently archived at http://web.archive.org/web/*/https://aspredicted.org/nx74k.pdf)