Give an example of an ABAB single-subject design. What is an advantage to using ABAB over ABA or AB designs? Find a journal article of a longitudinal study and outline the abstract. How could you...

Give an example of an ABAB single-subject design. What is an advantage to using ABAB over ABA or AB designs?

Find a journal article of a longitudinal study and outline the abstract. How could you change this study to a cross-sectional one?

Cohort effects are a threat to validity in which design: longitudinal or cross-sectional?