Week 5 Psychometrics Check

Question 1

Psychologists have not set a fixed value at which reliability can be interpreted as satisfactory or not

Accepted Answer

True

Question 2

In order to estimate the percentile rank for any given z score, we have to assume the distribution of scores is normal

Accepted Answer

True

Question 3

Linear transformations include all but the following

Accepted Answer

Percentile rank

Question 4

Generalizability theory

Accepted Answer

Separates systematic error from random error to eliminate systematic error

Question 5

Defining characteristics of psychological tests

Accepted Answer

F. All but A & E

Question 6

Measures of central tendency tell you something about the middle of a series of #s but little about the variability

Accepted Answer

True

Question 7

What is the median of the following group of numbers: 4, 7, 8, 8, 9, 10, 12, 14?

Accepted Answer

B. 8.5

Question 8

There is a set standard for the number of days that should be between a test and retest

Accepted Answer

False

Question 9

If John has scored 53 on a test, what can we say about how she has done?

Accepted Answer

All but D & E

Question 10

Class average is 0.5 SD above nat'l mean of 85; passing is 1 SD below the mean, so likely many failed

Accepted Answer

False

Question 11

To correct for decreasing test length using split-half reliability

Accepted Answer

Use Spearman-Brown

Question 12

Correlations can range from -1 to +1 but reliability coefficients range from 0 to 1, even though they're correlations

Accepted Answer

True

Question 13

What is the range of the following group of scores: 4, 7, 8, 8, 9, 10, 12, 14

Accepted Answer

D. 10

Question 14

Army Beta test was used with those unable to read, write, or speak English

Accepted Answer

True

Question 15

Approximately 84% of people perform higher than 1 SD below the mean

Accepted Answer

True

Question 16

1. On all normally distributed curves, the mean, median, and mode are the same

Accepted Answer

True

Question 17

On a negatively skewed curve, which is true?

Accepted Answer

The mean is lower than the median which is lower than the mode

Question 18

Classical Test theory can be modeled as

Accepted Answer

Obtained score = True score + Error

Question 19

Diana gives a test with a 5-point Likert scale: never, sometimes, often, almost always. This is a

Accepted Answer

Ordinal Scale

Question 20

Cohen's kappa is used for

Accepted Answer

Interrater reliability

Question 21

A reliable test measures what we said it would measure

Accepted Answer

False

Questions 21