In her study of student athlete's achievement motivation, Katie administers a self-report achievement motivation scale before she starts a new motivation enhancement intervention. After the intervention, Katie again assesses students' achievement motivation. She set her alpha at p = .05, and reported that there were no significant findings in her study. Which statistical analysis was appropriate for Katie to use to determine if there were treatment differences in her study?
A) Pearson r
B) ANOVA
C) Spearman rho
D) t test

Question

Quizplus · Accepted Answer

Katie's study design involves comparing the same group of student athletes' achievement motivation before and after an intervention. This pre-test/post-test design is best analyzed using a paired samples t-test, which compares the means of two related groups to determine if there is a statistically significant difference between these means. The other options (Pearson r, ANOVA, Spearman rho) are not as appropriate for this specific research design and question. Pearson r and Spearman rho are correlation coefficients, used to measure the strength and direction of a relationship between two variables, not differences between groups or conditions. ANOVA is used when comparing the means of three or more groups, not just two related groups.

In Her Study of Student Athlete's Achievement Motivation, Katie Administers