1 / 7

# differential casual-comparative research - PowerPoint PPT Presentation

Differential (Casual-comparative) Research. Definition – Research design in which behavior is measured in 2 groups that differ on 1 primary variable. The “IV” (not true IV) is the ________ or ______variable Classification variable is not manipulated because it is _______ or ___________

Related searches for differential casual-comparative research

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.

## PowerPoint Slideshow about 'differential casual-comparative research' - ostinmannual

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

Definition – Research design in which behavior is measured in 2 groups that differ on 1 primary variable.

• The “IV” (not true IV) is the ________ or ______variable

• Classification variable is not manipulated because it is _______or___________

• history of abuse vs. no history

• Males vs. females

• heroine abusers vs. polydrug abusers

Does Group A differ from Group B on measures of the DV?

Intact Group of Participants

Intact Group of Participants

Measurement of the Dependent Variable

Measurement of the Dependent Variable

Does ____ demonstrate a causal relationship

• There is no guarantee that the two groups will be ______________ in all other ways.

• There may be ________________ explanations for the observed differences.

e.g., kids who play sports vs. those who don’t – compare measures of academic success.

• Select groups that vary on __ quantifiable variable

• Requires ________ definitions

• Matching participants – equate groups on ______________factors

• Select _____________ groups – more likely to see difference in variable of interest

10 children w/severe behavior problems

10 children w/no behavior problems

Compare the two groups

Avg. IQ = 103

Avg. IQ = 104

Avg. # hobbies = 4

Avg. # hobbies = 3

Avg. # siblings = 4

Avg. # siblings = 1

History of abuse = 6/10

History of abuse = 3/10

Relationship?

20 smokers

20 nonsmokers

Compare the two groups

Ed. = High school

Ed. = High school

Avg. # drinks/day =

2

Avg. # drink/day =

3

15/20 single

5/20 married

3/20 single

17/20 married

Relationship?

Cross-sectional research design

• Measure a variable in different ___________

• Like a ____________ group design

• Cannot determine how any ___________ changes

• Other factors may influence groups other than age (______/_____________ effects)

Age group 1

e.g., 2-3

Age group 2

e.g., 4-5

Age group 3

e.g., 6-7