PSY30400 Lecture Notes - Lecture 5: Flynn Effect, Convergent Validity, Discriminant Validity
Intelligence
• Flynn Effect:
o in the past 100 years intelligence scores have risen steadily by about 27 points
• Reliability:
o a test is reliable when it yields consistent results
o split half reliability:
▪ dividing the test into two equal halves and assessing how consistent the
scores are
o test-retest reliability:
▪ using the same test on two occasions to measure consistency
• Validity:
o if a test is valid it measures what it is supposed to predict
• content/construct validity:
o the extent a test measures a particular behavior or trait
o convergent validity:
▪ a test is positively correlated with other tests thought to measure the
same thing
o discriminant validity:
▪ a test is not strongly correlated with tests thought to measure different
things
o predictive/criterion validity:
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