Exam 10: The Nonexperimental and Quasi-Experimental Strategies: Nonequivalent Group, Pre-Post, and Developmental Designs

Describe the fundamental flaw that prevents a nonequivalent group design from being a true experiment? (That is,why can't these designs produce an unambiguous cause-and-effect explanation?)Explain how the pretest scores in a pretest-posttest nonequivalent control group design help reduce this problem.

The pretest-posttest nonequivalent control group design reduces the threat of assignment bias and limits time-related threats and therefore is a quasi-experimental design.

Describe the fundamental flaw that prevents a pre-post design from being a true experiment? (That is,why can't these designs produce an unambiguous cause-and-effect explanation?)Explain how the series of observations before the treatment help reduce this problem.

Differential research is classified as

Last fall,a state college introduced a one-week study skills course for new freshmen students.At the end of the academic year,the college compared the grades and dropout rate for their freshmen with the corresponding measurements for freshmen at a neighboring state college.This study is an example of

A cross-sectional developmental design is an example of the general category of

In a time-series design a researcher makes multiple observations before and after the introduction of a treatment.