For this entire assignment, regardless of the research hypothesis, report the two-sided/two- tailed p – the one they give you by default… The two-tailed p is more conservative – less prone to type-1 error – so nobody will ever complain if you report a two-tailed p for a one-tailed test, even if a one-tailed test is technically correct, given the research hypothesis.
1. In the dataset SPSS3_selfesteem.sav, go to Variable View… expand the Labels column as wide as it will go. This column shows you exactly what participants were asked in this survey.
Based on reading the variable labels in variable view…
… What do you think was the purpose of this survey?
… Is there a certain difference you think Dr. Adams was hoping to find between selfesteem_t1 (the first question) and selfesteem_t2 (the last question)?
In as few words as possible, in your Answer-Sheet Document, explain your answers to these two questions.
2. To test whether there was a difference between selfesteem_t1 and selfesteem_t2, run a repeated measures t-test (see manual pp. 36-38 + repeated-measures lecture slides).
a. Screenshot/Paste the output into your Answer-Sheet Document
b. summarize the result in APA format.
c. Forget about APA format etc… Based on the result of this test, what would you conclude about the effect of [_? 🤔 ?_] on self-esteem? In plain language – like you’d explain it to Grandma – what general conclusion would you draw from this study? Use as few words as possible to make your point. It’s possible to earn full points on 2c with a single sentence!
3. Dr. Adams wonders if the overall boost to participants’ self-esteem in this survey was dependent on whether they committed to calling a loved one immediately after class on Monday. To explore this possibility, “split the file” by willyoucall (manual p. 19). NOTE: When you turn on “split the file by willyoucall,” nothing will happen immediately. Now that the file is split, however, you will receive two separate chunks of output for any
analyses you run: one chunk of output for participants who responded “okay, yes, I will call…” and another chunk for those who responded “nah…”
a. With split-file by willyoucall turned on, run the same exact analysis as in #2. Paste the two different chunks of output into your document, and explain the results in APA format.
HINT: Your write-up should take this form:
Among participants who did not commit to calling a loved one after class, [t- test results in APA format] .
By contrast, among participants who committed to calling a loved one after class, [t-test results in APA format] .”
b. Explain 3a in plain language, like you’d explain it to Grandma. How would you explain the effect of committing to actually call a loved one on self-esteem?
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