correlations

• negative correlation = one variable increases as another decreases
• positive correlation = both variables increase or decrease together
• correlations

  = a mathematical technique for measuring the strength and direction of the relationship between two variables.

  • there is no manipulation of the IV or measuring of the DV, no cause and effect relationship measured.
  • measure the strength of a correlation.
• strengths

  precise and quantifiable measure of how two variables are related

  • correlation can suggest ideas for future research
  • quick and economical
  • secondary data can be used, less time consuming
• weaknesses 


  only tell us what two variables are related, can't tell us why

  • another untested variable could be involved which is causing the relationship between the two variables- third variable problem
  • correlation can be misinterpreted in the media