Research Methods and Statistics -- CRJU 3002

Quiz 2 Study Guide -- Study Designs

(Experimental and Quasi-Experimental)

The primary use of the classic experimental design

Cause-effect relationship

Three conditions that must be met in order to establish a cause-effect relationship

1. Timing 2. Association 3. Eliminate Alternative Explanations

Four components of the classic experimental design

1. Intervention 2. Exp / Control 3. Pre / Post test 4. Random Assignment

Two variations on the experimental design

1) Post-test only experimental design

2) Two “treatments”

Differences between The quasi-experimental design and the experimental design

No Random Assignment

Advantages of the experimental design -- Flaw in a quasi-experimental design:

Pre-existing group differences

Fix for Flaw in a quasi-experimental design: Solution -- Utilize matching of subjects.

Factors that give rise to / constitute a threat of "alternative explanations" in research

Selection Bias:

History:

Maturation:

Attrition (Subject Mortality):

Testing Bias:

Instrumentation:

Reactivity:

Quiz 2 is (Coming Up Quick) , what to do to prepare:

2. Download Study-Guide for Quiz 2 (printed copy is contraband -- create your own hand written copy)

3. Read “Knowledge-Base Bivariate Frequency Distributions”

4. Accomplish “Homework: Bivariate Frequency Distributions”

6. Accomplish your reference list to turn in (hard copy) quiz day.