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MRCPsych Part B > Variables of Data > Flashcards

Variables of Data Flashcards

1
Q

Types of qualitative data

A

Nominal
Ordinal

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2
Q

Types of quantitative data

A

Discrete
Continuous

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3
Q

Types of continuous data

A

Interval
Ratio

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4
Q

What does variable refer to?

A

Anything that is measured or observed or manipulated in a study

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5
Q

What is nominal data?

A

Named categories

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6
Q

What is binary data?

A

Nominal data with just two categories

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7
Q

What is ordinal data?

A

Set of ordered categories

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8
Q

When is quantitative data said to be discrete?

A

If values of measurement are integers i.e. whole numbers

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9
Q

What is interval data?

A

Measurements where difference between two values is meaningful

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10
Q

What is ratio data?

A

They have all the properties of interval variable and also have a clear definition of zero points, so ratios are meaningful

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11
Q

Examples of ratio variables

A

Height
Weight

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12
Q

What can one calculate from nominal data?

A

Mode (frequency)

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13
Q

What can one calculate from ordinal data?

A

Mode
Median

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14
Q

What can one calculate from interval data?

A

Mode
Median
Sum/diferences
Mean

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15
Q

What can one calculate from ratio data?

A

Mode
Mean
Sum/differences
Mean
Ratios

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16
Q

What is the independent variable?

A

Controlled by experimenter
Presumed to have causal/antecedent effect on dependent variable

17
Q

What is dependent variable?

A

Depends on value of independent variable

18
Q

What is mediator variable?

A

One which mediates the effects of A causing B

19
Q

What is a complete mediator?

A

One without which A cannot cause B

20
Q

What is a partial mediator?

A

One which when absent, reduces but does not eliminate effect of A on B

21
Q

What is statistical mediation?

A

How C mediates the effects of A causing B

22
Q

How can the effects of mediators be statistically analysed?

A

Using regression tests

23
Q

How are nominal and ordinal data analysed?

A

Nonparametric tests

24
Q

How are most measured variables analysed?

A

Parametric tests

MRCPsych Part B (64 decks)

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