CORRECT ANSWERS
Reliability - CORRECT ANSWERS consistency of measurement or repeatability of an
observation
also described as consistency, dependability, stability, and precision
PPM is used to find it
Validity - CORRECT ANSWERS the degree of truthfulness of a test score. Dependent on
reliability and relevance
relevance - CORRECT ANSWERS the relation of something to the matter at hand
Objectivity or Interrater Reliability - CORRECT ANSWERS how biased or easily influenced
something is
observed score - CORRECT ANSWERS true score + measurement error
reliability coefficients range from? - CORRECT ANSWERS 0 to 1 and it has to be .8 or
higher to be desirable
longer tests are more reliable
interclass reliability - CORRECT ANSWERS only two variables, based on PPM
intraclass reliability - CORRECT ANSWERS more than two variables, based on anova
, test-retest reliability - CORRECT ANSWERS a method for determining the reliability of a
test by comparing a test taker's scores on the same test taken on separate occasions, uses PPM
to find correlation
If the time between testing occasions is longer (days) it is called stability reliability
equivalence reliability - CORRECT ANSWERS two parallel or equivalent forms of an exam
are given to participants, scores are correlated using PPM
two different test a and b
split-haves reliability - CORRECT ANSWERS administering the same test twice, or separate
tests. uses a single test to determine reliability by splitting the test into parts like odd and even
Spearman-Brown Prophecy Formula - CORRECT ANSWERS used to correct reliability
coefficients resulting from the split-half method
Used more with longer tests
K, Spearman brown - CORRECT ANSWERS k= the number of items i want to estimate the
reliability for divided by the number of items i have the reliability for
Cronbach's alpha coefficient - CORRECT ANSWERS equivalent to the average of all
possible split half reliabilities
most common intraclass correlation model, separates total variance into three components
(people, trial and people by trial)
people variance - CORRECT ANSWERS the observed score (total) variance between
participants
trial variance - CORRECT ANSWERS based on the variance across the trials (error)