Which of the following areas of psychology is most likely to employ single-subject research?

As a person gets older, they will experience an increase in which of the following abilities?

a. thinking abstractly b. inferring meaning c. linking concepts d. making judgments

In addition to habit reversal which of the following procedures have been found to be effective in decreasing habit behaviors?

a. DRO and response cost b. DRO and social disapproval c. DRO, response interruption and brief restraint d. all of these