Experimental and Nonexperimental Designs Both Have Their Own Limitations

Experimental and nonexperimental designs both have their own limitations. Specifically, experimental designs are often preferred because (all things being equal) they have especially good _____(a) ________. Alternatively, while nonexperimental designs usually have low _______(a) ______, they often offer higher levels of _______(b) ________.

A) external validity; internal validity
B) internal validity; external validity
C) generalizability; replicability
D) laboratory studies; field studies