Relationships Among Pre-Post Designs. Pre-Post Designs l Randomized experiment (R) l Nonequivalent group design (N) l Regression-Discontinuity design.

Slides:



Advertisements
Similar presentations
Chapter 11: Quasi- Experimental Designs This multimedia product and its contents are protected under copyright law. The following are prohibited by law:
Advertisements

Experimental Designs Dr. Farzin Madjidi Pepperdine University
8.2 PRE-EXPERIMENTAL DESIGNS (NONDESIGNS) One-Shot Case Study X O One-Group Pretest-Posttest Design O 1 X O 2 Intact-Group Comparison X O 1 ─ ─ ─ O 2.
1 COMM 301: Empirical Research in Communication Lecture 10 Kwan M Lee.
CHAPTER OVERVIEW The Nonequivalent Control Group Design The Static Group Comparison Single-Subject Design Evaluating Single-Subject Designs.
Other Quasi-Experimental Designs. Design Variations Show specific design features that can be used to address specific threats or constraints in the context.
Group Discussion Describe the fundamental flaw that prevents a nonequivalent group design from being a true experiment? (That is, why can’t these designs.
Quasi-Experimental Design Ken Koedinger Based on Trochim Chpt 10.
1 Designing A Study Adapted from The Research Methods Knowledge Base, William Trochim (2006). & Methods for Social Researchers in Developing Counries,
Quasi-Experimental Design
Probabilistic Equivalence in Experimental Design
Wed Oct 29, 2003 Exams after class Mean(SD): 71.6(11.6)% Range: 44-95% Appointment Research day 1 week.
Threats to Conclusion Validity. Low statistical power Low statistical power Violated assumptions of statistical tests Violated assumptions of statistical.
Who are the participants? Creating a Quality Sample 47:269: Research Methods I Dr. Leonard March 22, 2010.
Quasi & Non-Experimental Designs
RESEARCH DESIGN : 1. Kinds of support for making CAUSAL interpretations of observed relationships quality of theory research design used measurement procedures.
Types of Group Designs ____________ group design. The experiment compares groups that receive or _______________ the IV (control group) e.g., behavior.
Research Methods Experiment.
Introduction to Research Design. What Is Research Design? The structure of research.
Group Discussion Describe the similarities and differences between experiments , non-experiments , and quasi-experiments. Actions for Describe the similarities.
Chapter 11 Quasi-Experimental Designs ♣ ♣ Introduction   Nonequivalent Comparison Group Design   Time-Series Design   Regression Discontinuity Design.
Selecting a Research Design. Research Design Refers to the outline, plan, or strategy specifying the procedure to be used in answering research questions.
Research Design for Quantitative Studies
Quantitative Research Designs
Quasi-Experimental Designs Manipulated Treatment Variable but Groups Not Equated.
KNR 295 Quasi-Exptl Design Slide 1 Quasi-Experimental Design Ch. 8 – Non-random assignment.
RESEARCH DESIGNS OVERVIEW. EXPERIMENTAL DESIGNS When the Research Question Deals “with what happens if”
URBDP 591 A Lecture 8: Experimental and Quasi-Experimental Design Objectives Basic Design Elements Experimental Designs Comparing Experimental Design Example.
Experimental Design Presented By: Amber Atwater & Charlott Livingston.
Chapter Four Experimental & Quasi-experimental Designs.
By: Valerie Passalacqua Alana Goldstein Gloren Brown.
Research Methods for Counselors COUN 597 University of Saint Joseph Class # 4 Copyright © 2015 by R. Halstead. All rights reserved.
Experimental Designs. Experiments are conducted to identify how independent variables influence some change in a dependent variable.
Research Designs Quantitative studies. Experimental Research One important chch. Is that the researcher is an active agent rather than passive What are.
Experimental Research & Understanding Statistics.
Quasi-Experiments. Research Objective Show direct cause & effect Study relationships among variables for existing groups Explain outcomes after the fact.
Chapter 8 Experience carefully exploited: Quasi-experimental research designs.
Nonexperimental and Quasi- Experimental Designs Distinction is the degree of control over internal validity.
KNR 497 Exptl Design Slide 1 Experimental Design Ch. 8 – Let’s not kid ourselves, this is going to hurt.
Experimental & Quasi-Experimental Designs Dr. Guerette.
Research Design. Time of Data Collection Longitudinal Longitudinal –Panel study –Trend study –Cohort study Cross-sectional Cross-sectional.
Chapter 11.  The general plan for carrying out a study where the independent variable is changed  Determines the internal validity  Should provide.
Types of Experimental Designs (Educational research) True Experimental Quasi-Experimental.
Experiments Uniquely suited to identify cause-effect relationships To study effect of one variable (treatment) on another (outcome/dependent variable)
Advanced Research Designs u Designing Designs Designing Designs cause & effect. uEstablishing cause & effect. threats uMinimizing threats to validity?
Abstract critiques External, construct, internal….
October 31 st, 2003  Finish Quasi-experiment  True-experiment  Lit review assignments Full text only See reference lists of relevant articles (may require.
1. /32  A quasi-experimental design is one that looks like an experimental design but lacks the key ingredient -- random assignment. 2.
Table of Contents  Research Design  Threats to Internal Validity  Threats to External Validity  Proposed Data  Pre-Test Post-Test Data Results 
Psychology 290 Lab #6 – Research Design Nov. 7-9 Descriptive Correlation Experimental Quasi-experimental.
Research designs Research designs Quantitative Research Designs.
William M. Trochim James P. Donnelly Kanika Arora 8 Introduction to Design.
Quasi-Experiments. Quasi-Experiment Involves the comparison of pre-defined groups.
The Non-Experimental and Quasi- Experimental Strategies:
Research design I: Experimental design and quasi-experimental research
Types of Designs.
ASSIGNMENT NO.-2.
Making Causal Inferences and Ruling out Rival Explanations
Experimental Research
بسم الله الرحمن الرحیم.
Experimental, Quasi-Experimental, & Single-Subject Designs
Pre-post Double Blind Placebo Control Group Design
Quasi-Experimental Design
The Nonexperimental and Quasi-Experimental Strategies
Chapter 12 Quasi-Experimental Research: A Close Cousin to Experimental Research.
Types of Designs: R: Random Assignment of subjects to groups
Quasi experiments and small n designs
Similarities Differences
Reminder for next week CUELT Conference.
Chapter 9 Internal Validity
Presentation transcript:

Relationships Among Pre-Post Designs

Pre-Post Designs l Randomized experiment (R) l Nonequivalent group design (N) l Regression-Discontinuity design (C) OXOOOOXOOOO

The Main Issue l Selection threats l Are the groups similar before the treatment? l Related to assignment method in each design

Assignment Method Probability of Assignment to Treatment Given the Pretest Pretest

Assignment Method Probability of Assignment to Treatment Given the Pretest RE Pretest

Assignment Method Probability of Assignment to Treatment Given the Pretest RE RD Pretest

Assignment Method Probability of Assignment to Treatment Given the Pretest RE RD NEGD Pretest

Assignment Method Probability of Assignment to Treatment Given the Pretest RE RD NEGD Pretest

Pretest Equivalence Equivalent Maximally nonequivalent

Pretest Equivalence Equivalent Maximally nonequivalent RE

Pretest Equivalence Equivalent Maximally nonequivalent RDRE

Pretest Equivalence Equivalent Maximally nonequivalent RDNEGDRE

Assignment Rule Known 4 4 Regression-Discontinuity Randomized Experiment Nonequivalent Group Design

Feedback: Privacy Policy Feedback
Do Not Sell My Personal Information
About project: SlidePlayer Terms of Service

© 2025 SlidePlayer.com. Inc. All rights reserved.