A study by Bettmann (2007) published in the Journal of the American Psychoanalytic Association assessed whether the attachment relationships between adolescents and their parents change as a result of a residential wilderness treatment experience for the adolescents.Participants completed the Adolescent Attachment Questionnaire at the start and at the end of the wilderness program.Which statistical test should be used to determine whether the wilderness treatment affected attachment relationships?
A) single-sample t test
B) z test
C) effect size test
D) paired-samples t test

Question

Quizplus · Accepted Answer

A paired-samples t test is appropriate for determining whether there is a significant difference between the pre-treatment and post-treatment scores on the Adolescent Attachment Questionnaire for each individual participant. This test takes into account the dependency between the two sets of scores for each participant, which is necessary since the same participants are being measured twice. The other options (single-sample t test, z test, and effect size test) are not appropriate for this type of analysis.

A Study by Bettmann (2007) Published in the Journal of the American