PSY201H5 Lecture Notes - Lecture 2: Predictive Validity, Cognitive Test, Intelligence Quotient
Document Summary
Why do we need to know the various levels: frequency distributions. Start by thinking about frequency of log-ins vs time spent online. Can only be a whole number - 1, 2, 3. Can be divided indefinitely - 1hr 1/2, 3 hrs . Sep categories where no values exist in between neighboring categories. Roll of a dice, day of week, major, # of times one sneezes, # of people, # of likes, # of times log-in. Infinite # of values that fall between neighboring values. Point is bc can start to break down more and more. Phelps time swimming: ** come up with examples of discrete + cts for tests*, real limits of cts variables. Values are not discrete but reflect real limits: the boundaries of scores are exactly. What actually measuring is 2 seconds +/- 1/2 a second. Lower real limit = 1. 5 = bottom of interval. Upper real limit = 2. 5 = top of interval.
