Chapter 12 notes

Chapter 12 notes - Quasi-Experimental Designs Chapter 12...

Info iconThis preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon
Quasi-Experimental Designs Chapter 12
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Overview It is often the case that research is conducted that involves variables that cannot be manipulated Example: Seat-belt research Cannot assign ½ of sample to wear seat-belts and the other ½ to not wear them when measuring fatalities
Background image of page 2
Quasi-Experimental Designs Quasi-Experimental Designs : wherein we lack control over the assignment of the participants to condition and/or do not manipulate the causal variable of the interest Used in many cases to indicate that the variable is not a true independent variable manipulated by the researcher, but rather is an event that occurred for other reasons
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Quasi-Independent Variable Quasi-independent variable : used to indicate that the variable is no a true independent variable because it has not been manipulated by the researcher Example: What are the effects of social anxiety on social interactions? Here, we cannot make ½ sample socially anxious and the other ½ not anxious
Background image of page 4
Quasi-Experimental Designs Allow us to examine real-world phenomena However, since we cannot randomly assign participants to conditions and control for extraneous variables, there is a lack of internal validity
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Quasi-Experimental Designs 1. Pretest-Posttest Designs 1. Time Series Designs 1. Longitudinal Designs 1. Program Evaluations
Background image of page 6
One-Group Pretest-Posttest Designs One-Group Pretest-Posttest Design Pretest – treatment – posttest O1 X 02 O=observations X=treatment Very weak design
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
One-Group Pretest-Posttest Designs Example Drug Use Education Prevention Training
Background image of page 8
Image of page 9
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/30/2008 for the course PSYC 2094 taught by Professor Trcunningham during the Fall '07 term at Virginia Tech.

Page1 / 26

Chapter 12 notes - Quasi-Experimental Designs Chapter 12...

This preview shows document pages 1 - 9. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online