Reliability Flashcards

1
Q

What is reliability?

A

How consistent the finding from an investigation or measuring device are

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2
Q

What is a measuring device reliable?

A

Produces consistent results every time it is used

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3
Q

What is test-retest reliability?

A

Method of assessing reliability of questionnaire or psychological test by testing same person on two separate occasions

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4
Q

What does a test-retest reliability show?

A

The extent the test produces the same answer

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5
Q

What is inter-observer reliability?

A

The extent of which two or more observers agree on an observation of behaviour

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6
Q

How is inter-observer reliability measured?

A

Correlating the observations of two or more observers

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7
Q

How do you calculate inter-observer reliability?

A

(Total number of agreements)/(total number of observation)

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8
Q

What does the calculated inter-observer reliability have to be greater than in order to have a high inter-observer reliability?

A

0.8

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9
Q

How do you improve the reliability of questionnaires?

A
  • Test-retest

- Should produce a correlation that exceeds +0.8

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10
Q

What happens if test-retest is low in questionnaires?

A

Some items may need to be deselected or rewritten

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11
Q

How do you improve the reliability of interviews?

A
  • Same interviewer

- If not all should be trained the same

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12
Q

What can reduce interviewer bias?

A

Structured interviews as behaviours are more controlled by fixed questions

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13
Q

How do you improve the reliability of experiments?

A
  • Lab experiments = reliable as strict control over many aspects
  • High reliability in method rather than findings
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14
Q

How do you improve the reliability of observations?

A

-Making sure to have operationalised behavioural categories (measurable and self-evident)

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15
Q

Should categories overlap or not?

A

They shouldn’t

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