Correlations

• What is a correlation?


  Illustrates the strength and direction of an association between two co-variables
• What is a positive correlation?


  Co-variables increase together
• What is a negative Correlation?


  As one co-variable increases the other decreases
• No Correlation?


  No relationship between variables
• Difference between correlation and experiments:


  • In experiments the researcher manipulates the IV and records effect on DV
  • In a correlation there is no manipulation of variables so cause and effect cannot be demonstrated
• Strengths of Correlations:?

  • Useful starting point
  • Quick and economical, using secondary data
• Limitations of Correlations:


  • Can't determine cause and effect
  • Intervening variables
  • May be misinterpreted