Eduqas A-Level Psychology A290QS
Biological Approach
Psychodynamic Approach
Behaviourist Approach
Cognitive Approach
Positive Approach
Comparing the Five Approaches
Core Studies in Social and Developmental Psychology
Planning Psychological Research
Data Handling, Statistics and Mathematical Skills
Evaluating and Validating Research
Personal Investigations and Novel Research Scenarios
Addictive BehavioursAddictive
Autistic Spectrum BehavioursAutistic spectrum
Bullying BehavioursBullying
Criminal BehavioursCriminal
SchizophreniaSchizophrenia
StressStress
Controversies in Psychology
Data Handling, Statistics and Mathematical Skills
Levels of measurement
- 3 things to know
- Component 2
Overview
Recall questions on Levels of measurement.
What you need to know
Answer each one before you reveal it.
An observer records how many children are playing alone, in a pair, or in a group. What level of measurement is this?
Define ordinal data.
Questions from this subtopic
Each one with the model answer underneath.
- 1
What does a data set's level of measurement tell you?
Model answer
It tells you what kind of information the numbers actually carry, which in turn decides which descriptive statistics and which inferential test may legitimately be used.
- 2
Define nominal data.
Model answer
Nominal data are frequency counts of items placed into named, separate categories that have no order and no numerical value.
- 3
An observer records how many children are playing alone, in a pair, or in a group. What level of measurement is this?
Model answer
Nominal, because the data are counts of how many cases fall into each named category.
- 4
Define ordinal data.
Model answer
Ordinal data are scores that can be placed in rank order, but where the gaps between adjacent positions are not guaranteed to be equal.
- 5
Why is a self-rating of anxiety on a scale of 1 to 10 treated as ordinal rather than interval?
Model answer
Because the difference between 4 and 5 is not necessarily the same size as the difference between 8 and 9, so the intervals are not equal.
- 6
Define interval data.
Model answer
Interval data are measured on a scale with equal, fixed intervals between adjacent points, but with no true zero.
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