Validity

• Validity

  External- the extent to which the results generalise to and represent a wide target population, its lowered by small, unrepresentative samples. Ecological- the extent to which behaviour observed in a study generalise to everyday scenarios, lowered by artificial research settings. Internal- the extent to which the IV can be said to have a casual effect on the DV, lowered b y demand characteristics and extraneous variables.
• Checking validity

  Content- involves checking the content of the method to see if its an appropriate test, ask an expert in the topic you are researching to assess your study. Concurrent- involves comparing the method with an older method which has known validity. Construct- demonstrates an association between test scores and theoretical concept, can be checked by comparing your test to several definitions of the concept.
• Checking Validity

  Face validity- the degree to which a procedure, especially a psychological test what was intended, no thorough analysis or testing is undertaken, not a sophisticated measure of validity. Predictive validity- the degree to which a test accurately predicts an event that will occur in the future, if the prediction is accurate then the test has predictive validity.