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Social Research Methods Experimental Research

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Presentation on theme: "Social Research Methods Experimental Research"— Presentation transcript:

1 Social Research Methods Experimental Research
MAN-10 Erlan Bakiev, Ph. D Experimental Research

2 Types of Research Questions
Causal relationships Ethical and practical limitations Capable of manipulation conditions Narrow in scope Confounding variables Generally good for micro-level data Convention

3 History of Experimental Design
Wilhelm M. Wundt ( ) Behaviorism Quantification Introduction of anonymity Applied research

4 Random Assignment

5 Random Sampling

6 How to Random Assign

7 Matching vs. Random Assignment

8 Experimental Design Logic Language of Experiments
Subjects Treatment Pretest Posttest Experimental group Control group

9 Experimental Design Logic Steps in an Experiment
Hypothesis Choose a design Design experiment How to introduce IV How to measure DV Locate subjects Randomly assign subjects Gather pretest data Run experiment Introduce treatment Measure DV Gather posttest data Debrief Analyze data

10 Experimental Design Logic Control in Experiments
Controlling all aspects of the experiment Deception Confederate

11 Classical Experimental Design

12 Preexperimental Design

13 Quasi-experimental Design
Two-Group Posttest-Only Interrupted Time Series Equivalent Time Series Latin Square Solomon Four-Group Factorial

14 Quasi-experimental Design

15

16 Internal and External Validity

17 Internal Validity Threats to internal validity Selection bias History
Maturation Testing Instrumentation Experimental mortality Statistical regression

18 Internal Validity Threats to internal validity Manipulation check
Diffusion of treatment Compensatory behavior Experimenter expectancy Double-blind/Single-blind Demand characteristics Placebo effect Manipulation check

19 External Validity Population generalization
Naturalistic generalization Mundane realism Reactivity Hawthorne effect Theoretical generalization Experimental realism

20 External Validity

21 Practical Considerations
Planning and pilot tests Instructions to subjects Postexperiment interview Debrief

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