When assessing unusual levels of temporary discomfort, which of the following would be the top concern to a researcher?

Question

Quizplus · Accepted Answer

Unrelieved pain is a top concern of researchers. A potential feeling of sadness, taking 30 minutes of the participant's time, and the cost of bus fare or gas are all concerns, but are not as costly to the participant as unrelieved pain.
A potential feeling of sadness is less likely to be as costly to the participant as unrelieved physical pain.
The amount of time to complete the tool is not as costly to the participant as unrelieved physical pain.
The cost of bus fare or gas to travel to the research facility is less costly to the participant than unrelieved chronic pain.

When Assessing Unusual Levels of Temporary Discomfort, Which of the Following