When selecting participants from a population, experimenters need
A) to be concerned about differences between volunteers and nonvolunteers.
B) not worry about random selection with children
C) not worry about representativeness if a large sample size is used.
D) all of the above.

Question

Quizplus · Accepted Answer

Volunteers might differ in significant ways from non-volunteers, potentially introducing bias into the study. This concern is valid regardless of the population being studied (including children) or the size of the sample. Random selection and representativeness are important factors in research design to ensure the results are generalizable.

When Selecting Participants from a Population, Experimenters Need