Psychology /2022-2024 Year 13 A-Level Psychology - Research Methods: Stats Testing

2022-2024 Year 13 A-Level Psychology - Research Methods: Stats Testing

Psychology26 CardsCreated about 2 months ago

This flashcard set covers levels of measurement in statistical testing for A-Level Psychology. It explains that nominal data involves categories, while ordinal data can be ranked but lacks equal intervals between values.

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This level of measurement is presented in the form of categories

Nominal

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Key Terms

Term

Definition

This level of measurement is presented in the form of categories

Nominal

This level of measurement can be ranked but does not have fixed intervals.

Ordinal

A researcher gave a questionnaire to her participants to rate their happiness in their marriage on a scale of 1(unhappy) to 4 (happy). What level of measurement is she using and why?

Ordinal
It is based on opinions of whether they thought they have a happy marriage

A researcher asked people whether they were currently on a diet or not on a diet. What level of measurement is this?

Nominal

Why is time considered interval level data?

it is an objective/factual measure which has equal intervals

A research gave participants a standardised IQ test. What level of measurement is this?

Interval (as it is a standardised measure)

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2022-2024 Year 13 A-Level Psychology - Research Methods: Stats Testing

Term	Definition
This level of measurement is presented in the form of categories	Nominal
This level of measurement can be ranked but does not have fixed intervals.	Ordinal
A researcher gave a questionnaire to her participants to rate their happiness in their marriage on a scale of 1(unhappy) to 4 (happy). What level of measurement is she using and why?	Ordinal It is based on opinions of whether they thought they have a happy marriage
A researcher asked people whether they were currently on a diet or not on a diet. What level of measurement is this?	Nominal
Why is time considered interval level data?	it is an objective/factual measure which has equal intervals
A research gave participants a standardised IQ test. What level of measurement is this?	Interval (as it is a standardised measure)
A researcher gave participants 20 words to learn. Group one listened to the words whereas the other group read the word. The total number correctly recalled was measured. What level of measurement is this?	Ordinal as there are not equal intervals between scores
What examples of objective measures would be seen as interval level data?	Time, height, weight & standardised measures
Which statistical test should be used? The Bavarian Institute of Health Exploitation was concerned about the effect of lager drinking on the local population. They studied if there was a difference between drinkers and their IQ. The participants were grouped by IQ (high medium and low) and drinking (drinkers and non-drinker).	Chi-square Difference - in IQ of drinkers and non-drinkers Independent - either drinker or non drinker Nominal - categories of high,medium or low IQ and drinker or non-drinker
Which statistical test should be used? Some people argue that exposure to cold weather causes the common cold. Researchers tested this supposed link by selecting a sample of school children and developed a scale for how often they played outside (1 represents never and 10 is always joins in). They also developed a scale for the number of colds with 1 representing very few and 5 is very frequently.	Spearman’s Rho Correlation between playing outside and colds Ordinal level data - based on opinions
Which stats test would be appropriate? Test of difference, matched pairs & Nominal data	Sign Test
Which stats test would be appropriate? Test of difference, independent measures & ordinal level data	Mann Whitney
Which stats test would be appropriate? Test of correlation, and interval level data	Pearson’s r
Which stats test would be appropriate? Test of difference, independent measures and interval level data	Unrelated T-test
Which stats test would be appropriate? Test of correlation and ordinal level data	Spearman’s Rho
Which stats test would be appropriate? Test of correlation and nominal data	Chi Square
Which stats test would be appropriate? Repeated measures, test of difference and interval data	Related-T-test
Which stats test would be appropriate? Test of difference, Matched pairs and Nominal data	Sign Test
When should you use a Sign test?	Test of difference Repeated or matched pairs Nominal data
When should you use a Wilcoxon test?	Test of difference Repeated or matched pairs Ordinal data
When should you use a Related t-test?	Test of difference Repeated or matched pairs Interval data
When should you use a chi square?	Test of difference, independent measures and nominal data or Test of correlation, nominal data
When should you use a Mann Whitney U test?	Test of difference Independent measures, Ordinal data
When should you use an Unrelated T-test?	Test of difference Independent measures Interval data
When should you use a Spearman's Rho?	Test of correlation Ordinal level data
When should you use a Pearson's r?	Test of correlation Ordinal level data

2022-2024 Year 13 A-Level Psychology - Research Methods: Stats Testing

This level of measurement is presented in the form of categories

Key Terms

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