The two most important potential confounding factors in time-series designs are
A) history and instrumentation
B) selection and regression to the mean
C) regression to the mean and cohort effects
D) cohort effects and history
Question 2
By using an interrupted time-series design with a single group of participants, researchers can
A) randomly assign participants to treatment conditions.
B) take advantage of data already gathered over a long period of time.
C) create a simulated between-subjects design.
D) attenuate reliability.
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