discussion questions for ch 4

Question 1

how to define and judge a variable

Answer 1

event, situation, behavior or individual characteristic that varies

any variable must have two or more levels or values (extraversion/intoversion)

we measure them through operational definition (it ust have this to be studied empirically)

Question 2

operation definition of a variable

Answer 2

set of procedures used to measure or manipulate variable

Question 3

construct validity

Answer 3

sees if operational definition is measuring waht it intends to measure

Question 4

What do different values of the Pearson correlation coefficient, r, mean?

Answer 4

measures strength of a linear relationship between two variables

a perfect positive linear relationship is r=1

Question 5

no relationship

Answer 5

0-0.05

Question 6

weak relationship

Answer 6

0.1-0.3

Question 7

moderate relationship

Answer 7

0.3-0.5

Question 8

strong relationship

Answer 8

more than 0.5

more often-more than 0.7

Question 9

Curvilinear relationship

Answer 9

is a type of relationship between two variables where as one variable increases, so does the other variable, but only up to a certain point, after which, as one variable continues to increase, the other decreases.