measurement concepts

Question 1

Concurrent validity

Answer 1

Scores on the measure are related to a criterion measured at the same time

Question 2

Construct validity

Answer 2

degree to which the operational definition of a variable actually reflects the true theoretical meaning of the variable

Question 3

Content validity

Answer 3

The content of the measure captures all aspects of the intended construct.

Question 4

Convergent validity

Answer 4

Scores on the measure are related to other measures of the same construct or similar constructs

Question 5

Cronbach’s alpha

Answer 5

a way of assessing reliability by comparing the amount of shared variance, or covariance, among the items making up an instrument to the amount of overall variance

Question 6

Discriminant validity

Answer 6

Scores on the measure are NOT related to other measures that are theoretically different

Question 7

Face validity

Answer 7

The content of the measure appears to reflect the construct being measured

Question 8

Internal consistency reliability

Answer 8

Split-half reliability: Splits the test in half computing a separate score for each half, and then calculates a correlation between the two scores

Question 9

Inter-rater reliability

Answer 9

extent to which raters (researchers) agree in their observations

Question 10

Interval scale

Answer 10

-values are larger or smaller than next
-interval between variables is known and meaningful
-no true 0

Question 11

Measurement error

Answer 11

difference between a measured quality and its true value

Question 12

Nominal scale

Answer 12

-has no numerical or quantitative properties
-categorizes and groups differ from one another

Question 13

Nominal scale example

Answer 13

ethnicity

Question 14

Ordinal scale

Answer 14

-ranks order of variable being studied
-values are smaller or larger than the next
-do not know the interval (difference) between variables just the order

Question 15

Ordinal scale example

Answer 15

-first , second, and third place medals are given in a marathon

Question 16

Pearson product-moment correlation coefficient

Answer 16

measures linear correlation between two sets of data

Question 17

Predictive validity

Answer 17

score predicts some future behaviour that is relevant to construct

Question 18

Ratio scale

Answer 18

-values are smaller or larger than next
-interval between variables is known and meaningful
-all properties of interval scale but has true 0 point

Question 19

Reactivity

Answer 19

people behave differently because they know they are being measured

Question 20

Reliability

Answer 20

-Stability or consistency of the measurements produced by a specific measurement procedure
-measure gives consistent measure of that behaviour

Question 21

Test-retest reliability

Answer 21

-take test twice and see if results correlate

Question 22

True score

Answer 22

a theoretical value that represents a test taker’s score without error