In a single case design, an AB methodology is also known as a pretest-posttest

Since its creation in 1935, Social Security has expanded to include what groups?

a. retirees, survivors, and people with disabilities b. retirees, survivors, and the poor c. women, children, and people with disabilities d. women, children, and minorities

If statistical analyses show that the difference between condition means is no larger than would be expected on the basis of error variance alone, a researcher will

a. accept the null hypothesis b. reject the null hypothesis c. fail to reject the null hypothesis d. reject the experimental hypothesis e. both a and d