Lecture 4 (pt. 2)

Question 1

True Experiments

Answer 1

Manipulation of IV and random assignment to levels of the IV
Random assignment controls for confounding of potential individual difference variables

Question 2

Quasi-experimental Designs

Answer 2

Random assignment is absent and/or it is not possible to use random assignment. That is, the researcher has no control of the “independent” variable

Question 3

Raw score (2 components)

Answer 3

Raw score = True Score + Error

Question 4

Reliability:

Answer 4

The extant to which a measure will produce the same results each time it is used

Question 5

What Threatens Reliability

Answer 5

Random (unsystematic) Error

Question 6

Validity

Answer 6

THe extant to which a research method measures what it is intended to measure

Question 7

What threatens Validity

Answer 7

Bias (systematic error)