PSY 550 Final Exam with Answers Graded A+

PSY 550 Final Exam with Answers Graded A+ 10/10 All Correct For each of the following examples, explain whether the researcher has made a correct decision or has made a Type 1 or Type 2 error. Explain why. 1. Dr. G rejects the null hypothesis although the independent variable had no effect. 2. Dr. R rejects the null hypothesis when it is false. 3. Although the independent variable had an effect, Dr. E does not reject the null hypothesis 1. Dr. G realizes that a type 1 error has been made since there was no proof that the null hypothesis was false. 2. This is a smart decision by Dr. R since the rejection takes place since the null hypothesis is false. 3. Even though the independent variable had an effect Dr. E will no reject the null hypothesis creating a type 2 error since there is a false positive. In this case Dr. E failed to reject the null hypothesis which has been proven false. Explain the value of reversal designs (ABA designs) in single-case research. Reversal designs in single case research makes it easy for the researchers to find new conclusions based on repeating measures within the study by ensuring the effects of the independent variables are accurate as they reverse the roles. This type of design will greatly reduce they types of errors that can be associated with the measurements. Explain how a one-way analysis of variance works. How do you use between- and within-group variability?