Correlation

• Correlations


  Co-variables are measured and compared to look for a relationship, with no manipulated variables
• Scattergrams


  Plot measurements of 2 co-variables

  • Positive = as 1 increases, so does the other
  • Negative = as 1 decreases, so does the other
• Correlation Co-Efficient


  Represents the strength and direction of relationship between +1 and -1

  • Calculated using statistical tests, 0.8 is strong
• (+) A03: Potential Causes

  Correlations highlight potential causation which can be tested with experimental methods in further studies
• (-) A03: No Causation

  Does not prove causation between variables, no indication to which co-variable led to change, there could be an unknown 3rd variable