Which Area(s)would Be Considered to Be a Weakness of Quasi-Experimental

Which area(s) would be considered to be a weakness of quasi-experimental research designs? (Select all that apply.)

A) Costly to implement
B) Weakened confidence in making causal assertions
C) Subject to contamination by internal validity
D) Disruptive to the usual routine of the setting
E) Difficult to perform in a particular clinical setting
F) Findings may be the result of other extraneous variables

Correct Answer:

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