Choosing a statistical test Flashcards

1
Q

what is a statistical test

A

used in psychology to determine whether a significant difference or correlation exists

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2
Q

what is a sign test

A
  • statistical test for a difference in scores between related items
  • data should be at nominal level or better
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3
Q

what are levels of measurements

A
  • nominal
  • ordinal
  • interval
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4
Q

what is spearman’s rho

A

a test for correlation when data is ordinal level

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5
Q

what is pearson’s r

A

parametric test for a correlation when data is at interval level

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6
Q

what is wilcoxon

A
  • a test for difference between two sets of scores
  • data is ordinal
    -using a related design
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7
Q

what is mann whitney

A
  • a test for a difference
    between 2 sets of scores
  • data should be nominal level
  • using an unrelated design
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8
Q

what is related t - test

A
  • parametric test for difference between 2 sets of scores
  • data must be interval level
  • related design
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9
Q

what is unrelated t test

A
  • parametric test for difference between 2 sets of scores
  • data must be interval level
  • unrelated design
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10
Q

what is chi squared

A
  • test for association (difference or correlation) between 2 variables or conditions
  • data should be nominal
  • unrelated design
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11
Q

what is the acronym to remember the statistical test table

A

Carrots Should Come Mashed With Swede Under Roast Potatoes

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12
Q

what factors are used to decide which statistical test to use

A
  1. whether the researcher is looking for a difference or correlation
  2. in the case of a difference what experimental design is being used
  3. the levels of measurement
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13
Q

what are the 3 types of experimental designs

A
  1. related
    - repeated measures
    matched pairs
  2. unrelated independent design
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14
Q

what is nominal data

A
  • data represented in the form of categories
  • discrete (only one item can appear in one of the categories)
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15
Q
A
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