A school wellness team wants to test whether a brief planning message changes follow-through on an exercise goal. Students are randomly assigned to hear either the planning message or a neutral announcement. For the next week, students log how many days they complete a 20-minute walk. What is the dependent variable?
- AThe message condition assigned before the week begins.
- BThe number of days each student completes the walking goal.correct
- CThe research team's prediction about the message.
- DThe fact that walking is related to physical health.
Why B is correct
The measured follow-through after the assigned message is the dependent variable.
"A school wellness team wants to test whether a brief planning message changes follow-through on an exercise..." details toward stress appraisal, not just a familiar Mental and Physical Health label. The credited option, "The number of days each student completes the walking goal", is supported because The logged walking days are the measured outcome, so they are the dependent variable. "The fact that walking is related to physical health" is a real-looking alternative, but A topic connection is not a variable in the design; "The message condition assigned before the week begins" also fails because The message condition is the independent variable. The aim is to connect the concrete evidence to the psychological mechanism, then reject choices that shift the process, time frame, or research logic away from the scenario pattern.