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

Multiple Choice

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