In comparative studies, the use of ________ makes it difficult to identify the effects of unmeasured variables that are confounded with the independent or dependent variables.
A) convenience samples
B) ideal samples
C) samples that are hard to obtain
D) samples that are appropriate for the research objectives and design

Question

Quizplus · Accepted Answer

Convenience samples often include biases due to the non-random selection of participants, making it difficult to identify the effects of unmeasured variables that might be confounded with the variables of interest. This is because convenience samples do not necessarily represent the larger population well, leading to potential confounding factors not being evenly distributed or accounted for.

In Comparative Studies, the Use of ________ Makes It Difficult