Which of the following is a problem common to both longitudinal and time-lag studies?
A) They take many years to complete.
B) They confound cohort effects with placebo effects.
C) Results are difficult to interpret without advanced statistical knowledge.
D) Drop-outs can be controlled for through survival analysis statistical techniques.

Question

Quizplus · Accepted Answer

Both longitudinal and time-lag studies often require many years to complete, making them both susceptible to the challenges associated with extended research durations, such as maintaining participant involvement and funding.

Which of the Following Is a Problem Common to Both