Question

Research Scenario: A developmental psychologist is studying whether attachment can be improved upon by providing a parent training course. He has 10 parents who are seeking services to improve their children’s attachment to them. He uses a measure of which higher scores indicate more secure attachments to caregivers and gave it to them before and after the 4 week parent training course. The attachment scores data are presented below for Before and After the parent training course. Assume the data are normally distributed. Did the parent training course improve attachment?

Before	After
14	15
15	16
17	17
11	15
12	11
16	16
13	17
10	11
13	14
15	15

Answer the following questions based on the provided scenario.

14) Conduct a correlated groups t-test. Paste the appropriate SPSS output below.

15) Use the output to calculate r² (show your work in the space provided and remember if a number is negative, when squaring it will lose its sign and be positive). Interpret it (small, medium, large) based on the conventions for this effect size calculation.

Work:

Answer:

Answer 1