CSD 5100 Introduction to Research Methods in CSD

1. CSD 5100Introduction to Research Methods in CSD Group Designs in CSD Research Experimental Design and a Little About Data Analysis The Class Research Project: Methods

2. Research Designs Plans that include protocols for Selecting subjects Controlling extraneous variables Variables other than the independent variable(s) we’re interested in that may affect the dependent variable Observing the dependent variable Ensuring ethical procedures

3. Group Research Designs Designed to determine the effect of one or more independent variables on a selected dependent variable by comparing performance, observations, whatever among groups of subjects

4. Two Group Research Designs Randomized controlled two group design

5. Two Group Research Designs Quasi-experimental two-group design

6. Achieving Group Equivalence Two steps are necessary Identify the relevant variables known to be related to the dependent variables Match the groups of participants on the basis of these variables

7. Complex Group Designs Complexity of the basic group design can be increased by Having more than two levels to one independent variable Having more than one independent variable All the above

8. Multivalent Research Designs

9. Factorial Research Designs Attempt to model real-life events or conditions in which multiple variables may affect behaviors jointly Combinations of two or more variables sometimes produces a change in behavior that’s not present when the effects of single independent variables are observed

10. Classification of Factorial Designs Factorial research designs are generally classified in one of these ways Related designs Each subject experiences all treatment conditions Independent designs Matched subject groups experience a single treatment condition (1 level of 1 independent variable) This is what our class project design will be Mixed designs Combination of related and independent designs

11. Factorial Design Model Example of a 2 X 2 data summary table

12. Factorial Design Model for the Class Project This is a 3 X 2 independent factorial design

13. Factorial Design Model for the Class Project Adding a Third Independent Variable This would be a 3 X 2 x 2 independent factorial design

14. Class Project Data Analysis Model

15. Class Research Project: Methods Subjects Stimuli Data collection methods Instrumentation Measurements of voice onset time Anything else?