Lecture 13: Controlling for Confounding and Extraneous Variables

Question 1

Partial correlations are run when?

Answer 1

you have two continuous variables involved and you want to control for a variable

Question 2

Ancovas are run when?

Answer 2

you have a categorical IV and continuous DV

and are controlling for continuous covariates

Question 3

mancovas are run when?

Answer 3

you have categorical IV continuous DV MULTIPLE OF THESE

and continuous covariates

Question 4

case study

Answer 4

detailed study of a single individual group or event

systematic study of a person group or event

Question 5

to construct a case study researchers often…

Answer 5

interview the participant over several occasions in addition to gethering other data including survery observations and records = narrative description

Question 6

analysis of data from case studies is

Answer 6

qualitative

Question 7

case studies are used for

Answer 7

describing rare phenomena

exploratory research especially in the beginning stages to see if a full experiment is worth time money effort

to supplement empirical data with descriptive anecdotes

Question 8

three limitations to case studies include

Answer 8

lack of generalizability

lack of control over extraneous variables

observer bias –> rely on the observations by a single researcher thus there is often no way of determining the reliability of validity of the researchers observations or interpretations