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Unformatted text preview: -1 to 1 ) Reliability- measuring test against itself; consistency from one examination to the next Validity- content validity is the extent to which test relates to needed content of interest. Test does what it says it does Informal measures- frequency counts and % are internal data Criterion-ref. tests yield nominal data Rating scales provide ordinal data Norm-referenced test scores- age and grade equivalent are ordinal % rank scores standard score used to set mean and standard deviation 70,85,52,85,90,64,34 Mean- 67 (add up and divide by # of numbers) Median-70 Mode- 85 Range-56 Ch. 4 (Part 1) Basal- where you start testing: students must get 3 in a row (work backwards)-give credit for questions initially answered correctly, once answer is wrong we do not retest. Ceiling- when you stop ( 4 misses IN A ROW ) Chronological Age: YEAR MONTH DAY Todays date: 2011 1 1 D.O.B: 2002 1 3 = 9 0 2...
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- Winter '10