Author Question: To guard against most threats to internal validity in the classical experiment the researcher ... (Read 97 times)

PhilipSeeMore · **on:** Aug 13, 2018

To guard against most threats to internal validity in the classical experiment the researcher should:

a. focus upon external validity
b. focus upon generalizability
c. use random assignment
d. put subjects only in experimental groups

Question 2

The statement, there are no simple formulas for designing an experimental or quasi-experimental study suggests:

a. that there is an infinite variety of ways to design a study
b. that there is a finite variety of ways to design a study
c. that the one constant is the use of randomization in experiments
d. experiments and quasi-experiments should be used only as a last resort