ARH312Y1 Lecture Notes - Lecture 2: Criterion Validity, Epipaleolithic, Measurement Uncertainty
Document Summary
Data- observations and measurement you make on objects this data is theory laden (not independent from theory) Measurement is comparison- either to a standard (mm etc. ) or to a concept. There are measurement institutes that have standards for all weights lengths and concepts etc. Direct measurement directly compare an object of interest to a standard. Indirect measurement- measuring one phenomena to derive measurement of another concept. Degree of correlation between our measurement and the qualities or values we"re trying to measure. Face validity = widespread agreement by experts in the field. Content validity = appears to contain all important concepts and behaviours. Criterion validity = comparison of the measurement with a standard. Discrete : no grey areas between the categories. Continuous : between any two numbers on the scale you can find other numbers. The difference between 1cm and 2cm there can be 1. 5cm there is always another number between the numbers you are looking at hence continuous.
