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?

Question

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? ​

Quizplus · Accepted Answer

A changing-criterion design is appropriate because it involves gradually changing the target behavior (in this case, the number of vegetable servings) over time, which aligns with the program's structure of gradually increasing the target number of vegetables.

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