In an A-B design, there are _____ threats to internal validity.
A) no
B) few
C) many
D) None of the above.

Name: In an A-B design, there are _____ threats to internal validity. A) no B) few C) many D) None of the above.
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An A-B design, which involves a baseline (A) and an intervention (B), is susceptible to many threats to internal validity, such as history, maturation, testing, instrumentation, and regression to the mean, because it lacks control conditions or randomization.

In an A-B Design, There Are _____ Threats to Internal