A Healthy-Eating Program Requires Participants to Monitor Their Vegetable Consumption

Multiple Choice

A healthy-eating program requires participants to monitor their vegetable consumption and to increase the number of vegetables they eat.The program sets a target for the number of vegetables a participant is required to eat each day,and the target number is changed every week.Although the target moves up and down,it gradually increases toward a goal of eight servings of vegetables daily after six weeks.Suppose this program were evaluated using a single-subject design.Which design would be appropriate? ​

A) ​ABAB design
B) ​multiple-baseline design
C) alternating-treatments design
D) ​changing-criterion design