Purchase Solution

Quasi Experiment Design: Non Equivalent Groups

Not what you're looking for?

Ask Custom Question

Assume that I wanted to test some treatment on A university Program Evaluation students in the School of Public Policy and Management. I decided to give this treatment to groups 1 and 2, and use groups 3 and 4 as a control/comparison group. Remember that you were divided into groups on the basis of your last name: alphabetically the first student went into group one, the second into group two and so on with the fifth student going into group one.

(1) Is this an experimental or quasi-experimental design? Why?

(2) What possible differences might there be between the two groups? (Hint: remember how I originally divided you into groups)

(3) What threats to internal validity would not be controlled by this design?

(4) Do you consider this a good design? Why?

Suppose I gave then decided to evaluate how much students learn about program evaluation in PPM 804N.

(5) What would be a reasonable comparison group? Why?

(6) Delineate your design using X's and O's, and label it with the appropriate name.

(7) Would you use a pre- and post- test? If so, generally define what form that test(s) will take (2-3 sentences - I don't need exact questions!) Will you use the same test pre and post? Why?

Purchase this Solution
Solution Summary

Assume that I wanted to test some treatment on A university Program Evaluation students in the School of Public Policy and Management. I decided to give this treatment to groups 1 and 2, and use groups 3 and 4 as a control/comparison group. Remember that you were divided into groups on the basis of your last name: alphabetically the first student went into group one, the second into group two and so on with the fifth student going into group one.

(1) Is this an experimental or quasi-experimental design? Why?

(2) What possible differences might there be between the two groups? (Hint: remember how I originally divided you into groups)

(3) What threats to internal validity would not be controlled by this design?

(4) Do you consider this a good design? Why?

Suppose I gave then decided to evaluate how much students learn about program evaluation in PPM 804N.

(5) What would be a reasonable comparison group? Why?

(6) Delineate your design using X's and O's, and label it with the appropriate name.

(7) Would you use a pre- and post- test? If so, generally define what form that test(s) will take (2-3 sentences - I don't need exact questions!) Will you use the same test pre and post? Why?

Purchase this Solution
Free BrainMass Quizzes
Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.

Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

Measures of Central Tendency

Tests knowledge of the three main measures of central tendency, including some simple calculation questions.

Know Your Statistical Concepts

Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.

View More Free Quizzes
Related BrainMass Solutions

  • Study designs and validity threats

    Non-equivalent control group pretest only This type of design utilizes pre-measurements for at least two groups. The lack of randomization in this study type affects the internal validity of the study.

  • Statistics Questions - quasi-experiments

    non-equivalent control group design is used to compare two groups (one is called treatment group whereas other is the non-equivalent control group) of participants, provided the two groups are non-equivalent.

  • Quasi-experimental design

    Because it is not ethical to randomly assign treatment that has been proven to be effective to one group of patients but deny the control group this treatment, non-equivalent quasi-experimental design would be appropriate wherein the entire group receives

  • Random Assignment and Equivalence

    If you cannot assume equivalence at either end of the study, then it must be deemed a quasi-experiment and should be noted as such in the study.

  • Quasi-Experimental and Experimental Design

    If the experiment is set up correctly, I do not think that a quasi experiment should have any different problems with reliability then an experimental design.

  • Experimental vs. Quasi-Experimental Designs

    One type of quasi-experiment is called "the non-equivalent control group design" (Shaughnessy et al., 2006, p. 372). In this type of quasi-experiment a treatment group and comparison group are compared using a pretest and posttest measure.

  • Internal Validity of True Experiements

    NOT all experimental designs are true experiments, such as the quasi-experimental design, which uses an experimental design as defined above, but is not a true experiment because of the lack of random assignment to treatment groups.

  • Type of research used

    A true experiment requires the random assignment of subjects (such as people, animals, or plants) to a treatment group. Random assignment is the only way that groups can be considered statistically equivalent.

  • Assessing Research Designs

    The most common is the non-equivalent groups design, which means the participants cannot be randomly assigned to experimental, and control groups.

View More Related Solutions