What is one factor that influences which statistical test a researcher should use?

Level of measurement (the type of data collected).

Besides level of measurement, what other factor affects the choice of statistical test?

Experimental design (whether the design is related or unrelated).

What is nominal level data?

Data in discrete categories with no order or ranking between them (e.g., gender, eye colour, experimental condition).

What is ordinal level data?

Data that can be ranked or ordered, but the intervals between ranks are not necessarily equal (e.g., positions in a race, rating scales).

What is interval/ratio level data?

Data measured on a scale with equal intervals between points, allowing for meaningful mathematical operations (e.g., time in seconds, temperature in °C, test scores with equal intervals).

Name the three levels of measurement that are relevant when selecting an appropriate statistical test.

Nominal, ordinal, and interval/ratio.

AQA A-Level Psychology 7182

Social Influence

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Memory

Topic overview The multi-store model of memory Types of long-term memory The working memory model Explanations for forgetting Factors affecting the accuracy of eyewitness testimony

Attachment

Topic overview Caregiver-infant interactions: reciprocity and interactional synchrony Schaffer's stages of attachment Multiple attachments and the role of the father Animal studies of attachment Explanations of attachment Ainsworth's Strange Situation and types of attachment Bowlby's theory of maternal deprivation and effects of institutionalisation Influence of early attachment on relationships Cultural variations in attachment

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Biopsychology

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Clinical Psychology and Mental Health

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Research Methods

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Scientific Processes

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Quantitative and Qualitative Data

Topic overview Quantitative and qualitative data; the distinction between qualitative and quantitative data collection techniques Primary and secondary data, including meta-analysis Descriptive statistics: measures of central tendency and measures of dispersion Presentation and display of quantitative data: graphs, tables, scattergrams, bar charts Distributions: normal and skewed distributions Introduction to statistical testing; the sign test

Data Handling and Analysis

Topic overview Primary and secondary data Descriptive statistics Presentation and display of quantitative data Distributions Analysis and interpretation of correlation Levels of measurement Coding in content analysis

Inferential Testing

Topic overview The sign test Probability and significance Factors affecting the choice of statistical test

Issues and Debates in Psychology

Topic overview Gender and culture in Psychology Free will and determinism The nature-nurture debate Holism and reductionism Idiographic and nomothetic approaches Ethical implications of research and social sensitivity

RelationshipsOption 1

Topic overview Factors affecting attraction in romantic relationships Evolutionary explanations for partner preferences Theories of romantic relationships Online relationships Parasocial relationships

GenderOption 1

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Cognition and DevelopmentOption 1

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SchizophreniaOption 2

Topic overview Symptoms of schizophrenia and issues in diagnosis Biological explanations for schizophrenia Psychological explanations for schizophrenia Drug therapy for schizophrenia Psychological therapies for schizophrenia The interactionist approach to schizophrenia

Eating BehaviourOption 2

Topic overview Explanations for food preferences Neural and hormonal mechanisms in eating behaviour Biological explanations for anorexia nervosa Psychological explanations for anorexia nervosa Biological explanations for obesity Psychological explanations for obesity

StressOption 2

Topic overview The physiology of stress The role of stress in illness Sources of stress Measuring stress Individual differences in stress Managing and coping with stress

AggressionOption 3

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AddictionOption 3

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Explanations for Nicotine AddictionOption 3

Topic overview Brain neurochemistry, including the role of dopamine Learning theory as applied to nicotine addiction, including reference to cue reactivity

Explanations for Gambling AddictionOption 3

Topic overview Learning theory as applied to gambling, including reference to partial and variable reinforcement Cognitive theory as applied to gambling, including reference to cognitive bias

Inferential Testing

Factors affecting the choice of statistical test

5 things to know
Paper 2

Overview

The three levels of measurement, the difference between related and unrelated designs, and which test fits each combination of the two.

What you need to know

Answer each one before you reveal it.

Your recallNot started

Evaluation

Why does the choice of statistical test matter?

Key term

Name and define the three levels of measurement.

Key term

Which designs need a related test, and which need an unrelated one?

Process

Which test fits each combination of design and data level?

Key term

What conditions must be met before a parametric test can be used?

Questions from this subtopic

Each one with the model answer underneath.

1
What is one factor that influences which statistical test a researcher should use?
Model answer
Level of measurement (the type of data collected).
2
Besides level of measurement, what other factor affects the choice of statistical test?
Model answer
Experimental design (whether the design is related or unrelated).
3
What is nominal level data?
Model answer
Data in discrete categories with no order or ranking between them (e.g., gender, eye colour, experimental condition).
4
What is ordinal level data?
Model answer
Data that can be ranked or ordered, but the intervals between ranks are not necessarily equal (e.g., positions in a race, rating scales).
5
What is interval/ratio level data?
Model answer
Data measured on a scale with equal intervals between points, allowing for meaningful mathematical operations (e.g., time in seconds, temperature in °C, test scores with equal intervals).
6
Name the three levels of measurement that are relevant when selecting an appropriate statistical test.
Model answer
Nominal, ordinal, and interval/ratio.

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Social Influence

Memory

Attachment

Approaches in Psychology

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