Flashcards in 5.1 Measurement Concepts – Reliability Deck (11):

0

## ____ refers to the consistency or stability of a measure of behaviour.

### Reliability

1

## A reliable measure does not ____ from one reading to the next. If the measure does fluctuate, there is error in the measurement device.

### fluctuate

2

## Any measure that you make can be thought of as comprising two components: (1) a ____ ____, which is the real score on the variable, and (2) ____ ____.

### true score, measurement error

3

## The ____ ____ ____ (symbolised as r) can range from 0.00 to +1.00 and 0.00 to -1.00. A correlation of 0.00 tells us that the two variables are not related at all. The closer a correlation is to 1.00 the stronger is the relationship.

### Pearson correlation coefficient

4

## When you read about reliability, the correlation will usually be called a ____ ____.

### reliability coefficient

5

## ____-____ reliability is assessed by measuring the same individuals at two points in time.

### Test-retest

6

## ____ ____ reliability is the assessment of reliability using responses at only one point in time.

### Internal consistency

7

## One indicator of internal consistency is ____-____ reliability; this is a correlation of the total score of one half of the test with the total score of the other half.

### split-half

8

## Another commonly used indicator of reliability based on internal consistency, called ____ ____, provides us with the average of all possible split-half reliability coefficients. The value of Cronbach's alpha is based on the average of all the inter-item correlation coefficients and the number of items in the measure.

### Cronbach's alpha

9

## It is also possible to examine the correlation of each item score with the total score based on all items. Such ____-____ correlations are very informative because they provide information about each individual item.

### item-total

10