Reliability

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Define reliability.
Reliability refers to consistency of results.
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Define internal reliability.
Internal reliability is a measure of the extent to which something is consistent within itself.
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Define external reliability.
External reliability is a measure of the extent to which something is consistent over several different occasions.
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Define inter-observer reliability.
Inter-observer reliability is a measure of the extent to which two sets of results from the same research by two different observers are consistent.
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What two methods can be used to assess reliability?
Split-half method and Test-retest method.
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Describe the split-half method.
Used to assess internal reliability. Where results are split in half and the two halves are correlated against on another. If there is positive correlation then there is internal reliability.
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Describe the test-retest method.
Used to assess external reliability. Where research is conducted and then repeated again on a separate occasion. The two sets of results are then correlated with one another. If there is positive correlation then there is external reliability.
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Give 5 ways of improving reliability.
1. Use a standardised procedure and ensure methodology is clearly written with detail to allow replication.
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2. Ensure materials are fully operationalised so that they are interpreted by all in the same way.
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3. Take more than one measurement from participants and record the average score.
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4. Conduct a pilot study.
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5. In observations train all observers in the coding system/ Train interviewers in interviewing successfully.
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Other cards in this set

Card 2

Front

Define internal reliability.

Back

Internal reliability is a measure of the extent to which something is consistent within itself.

Card 3

Front

Define external reliability.

Back

Preview of the front of card 3

Card 4

Front

Define inter-observer reliability.

Back

Preview of the front of card 4

Card 5

Front

What two methods can be used to assess reliability?

Back

Preview of the front of card 5
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