5.1 Measurement Concepts – Reliability Flashcards Preview

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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

____ ____ is the extent to which raters, or researchers, agree in their observations.

Interrater reliability