A Health Psychologist Conducted an Experiment in Which Participants Watched

question 5

Essay

A health psychologist conducted an experiment in which participants watched a film that either did or did not include a person being injured because of not wearing a seat belt.A week later,as part of a seemingly different study,these same participants reported how important they thought it was to wear seat belts.The 22 participants who had seen the injury film gave a mean rating of 8.3,with an estimated population standard deviation of 1.6.The 30 participants in the control condition had a mean of 7.4 with an estimated population standard deviation of 2.2.Using the .01 significance level,does seeing a movie where a person gets injured due to not wearing a seat belt make attitudes more positive towards seat belt usage as indicated by higher ratings?
a.Use the five steps of hypothesis testing.
b.Sketch the distributions involved.
c.Figure the effect size.
d.Explain the logic of what you did to a person who is familiar with the t test for a single sample,but who is unfamiliar with the t test for independent means.Be sure you explain how this problem differs from a t test for a single sample.Your answer should consist mainly of a thorough explanation of the characteristics of the comparison distribution and the logic of all the steps of figuring you did to determine those characteristics.

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Definitions:

Procedural Memory

A type of long-term memory that involves the unconscious recall of how to perform tasks or skills, such as riding a bike or typing.

Perspective Taking

The ability to understand and consider someone else's point of view or mental state.

Selman's Stages

A framework proposed by Robert Selman outlining the stages of social perspective-taking development in children, reflecting how they understand others' thoughts and feelings.

Self-Reflective

Having the ability or tendency to think about and analyze one’s own thoughts, feelings, and behaviors.