Which of the following is a critical concern for longitudinal research designs? A. Low cost of data collection
B. Lack of available literature
C. Subject attrition
D. Inflexible research questions
Which of the following is a critical concern for longitudinal research designs?
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The correct answer is C. Subject attrition.
Explanation: In longitudinal research designs, subject attrition refers to the loss of participants over time, which can affect the validity and reliability of the study’s results. This is a critical concern because if a significant number of participants drop out, it may lead to biased results and limit the generalizability of the findings. Keeping participants engaged over the course of the study is essential for collecting comprehensive data.