Question

1. A psychologist has developed a drug to reduce schizophrenia symptoms.  15 participants with schizophrenia are recruited.  The number of schizophrenic symptoms is recorded before the drug is administered (baseline), and again 3 months after the drug was first administered (follow-up). The data indicate that after receiving the drug, participants schizophrenic symptoms decreased by an average of M_D =10.6, with a SS = 325.

Conduct the appropriate hypothesis test to determine if the treatment had any effect (non-directional) at alpha=.05.  Specify the following:

1. a. What is the independent Variable

1. b. What is the dependent Variable

1. c. Name the appropriate statistical test used to conduct the hypothesis test.

1. d. Please type in the answers for the standard deviation; standard error of the mean differences (SMD), and t- test, critical t value and your hypothesis decision (reject or retain the null).

1. e. Compute Cohen's d to calculate the effect size.

1. f. Write a sentence showing how the outcome of the hypothesis test and the measure of effect size would appear in a research report.

Answer 1