Approaches to Studying Individual Differences

Question 1

How do we study IDs?

Answer 1

Lecture 1, slides 7-8

Question 2

Why do we care about IDs?

Answer 2

Lecture 1, slide 9

Question 3

What is Factor Analysis? What is the aim of FA? How to chose whether to have one or more factors?

Answer 3

Lecture 1, slide 11-16

Question 4

What are the two main types of FA?

Answer 4

Lecture 1, slide 17

Question 5

What are the uses of FA in general? What about EFA and CFA?

Answer 5

Lecture 1, slide 18-19

Question 6

What are the stages of FA?

Answer 6

Lecture 1, slide 20-21

Question 7

What are loadings? What are residuals?

Answer 7

Lecture 1, slide 22-27

Question 8

What is factor rotation and what is it used for? What are factor loadings? What is communality?

Answer 8

Lecture 1, slide 28-31

Question 9

What is the issue with unrotated factor matrices?

Answer 9

Lecture 1, slide 32

Question 10

What is orthogonal rotation? What is varimax rotation? What is oblique rotation?

Answer 10

Lecture 1, slide 33-40

• Orthogonal rotations constrain the factors to be uncorrelated. Although often favored, in many cases it is unrealistic to expect the factors to be uncorrelated, and forcing them to be uncorrelated makes it less likely that the rotation produces a solution with a simple structure.
• Oblique rotations permit the factors to be correlated with one another. Often produces solutions with a simpler structure.

Question 11

What is CFA?

Answer 11

Lecture 1, slide 41