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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.

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Evaluation

What is the critical value in inferential statistics?

Evaluation

What decision rule determines statistical significance for Spearman's rho?

Key term

What is a scatter diagram?

Questions from this subtopic

Each one with the model answer underneath.

  1. 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. 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. 3

    What pattern on a scatter diagram indicates no correlation?

    Model answer

    Points scattered randomly with no discernible pattern or trend.

  4. 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. 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. 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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