PSY 319

Question 1

What are the Pros and Cons of Correlational designs?

Answer 1

Pros: No manipulation of variables lets it have high external validity, establishes if a relationship exists
Cons: Third variable problem, directionality problem, low internal validity, cannot asses causality

Question 2

What are the pros and cons of Internet Surveys?

Answer 2

Pros: Efficient to reach a large amount of people quickly, individualized responses,
Cons: Hard to control composition of sample, sample may not be reflective of population, may not be representative

Question 3

What are the pros and cons of a Case Study

Answer 3

Pros: detailed and vivid, lets us examine rare cirumstances, identify unique variables, not averaged over a diverse group
Cons: Limited generalizations, lacks internal and external validity, prone to biases and subjective interpretations

Question 3

What is the main effect, give an example

Answer 3

A main effect is the average difference among certain levels of a independent variable on a dependent variable.
Example: Testing if tutoring and extra homework improve grades. There are two main effects if tutoring improves grade, or if extra homework improves grades

Question 4

What is an interaction and give an example

Answer 4

An interaction is when one factor is dependent and influences a second factor. Drug interactions is an example of this.

Question 5

What test for study with two nominal variables

Answer 5

Chi square of independence

Question 6

What test for study with 2 continuous variables

Answer 6

Pearsons r correlation

Question 7

What test for a mixed variable test with two independent variables

Answer 7

t-test

Question 8

What test for a mixed variable test with more than two independent variables

Answer 8

AVONA

Question 9

What test for Between Subjects

Answer 9

Independent

Question 10

What test for Within subject

Answer 10

Dependent/ repeated measures