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Biological Psychology
Spearman's rho, chi-squared and significance
- 3 things to know
- Papers 1 and 3
Overview
Recall questions on scatter diagrams, the range and meaning of Spearman's rho, critical values and significance, why correlation is not cause, the Spearman's rho and chi-squared formulae and decision rules, rearranging and rounding, and when each test is used.
What you need to know
Answer each one before you reveal it.
What decision rule determines statistical significance for Spearman's rho?
What is a scatter diagram?
Questions from this subtopic
Each one with the model answer underneath.
- 1
What is a scatter diagram?
Model answer
A graph that displays correlational data by plotting each participant's scores on both co-variables as a single point.
- 2
How does a negative correlation appear on a scatter diagram?
Model answer
Points cluster around a line sloping downward from left to right.
- 3
What pattern on a scatter diagram indicates no correlation?
Model answer
Points scattered randomly with no discernible pattern or trend.
- 4
What is Spearman's rho?
Model answer
A statistical test used to determine the strength and direction of a correlation between two co-variables.
- 5
What range of values can Spearman's rho produce?
Model answer
From −1 (perfect negative correlation) through 0 (no correlation) to +1 (perfect positive correlation).
- 6
What does a Spearman's rho value of −1 indicate?
Model answer
A perfect negative correlation between the two co-variables.
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