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CDIS 623 Standardized Based Assessment Exam
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CDIS 623 Standardized Based Assessment Examwhy is psychometrics important?
-important to be a good consumer at level of purchasing from publisher and applying
information that you collect
-if you dont understand it and the development of standardized test, it makes it hard for
you to make decisions as an SLP
what is a normal curve?
representation of distribution of typical human behaviors
what is a raw score?
total # of items correct
what is a standard score?
comparison to other children with same age
what is the mean of standard score?
100 w/ SD of 15
what is standard deviation?
statistic that tell us how far a sore is from the mean
what is a composite score?
reflects multiple subtest/scaled scores that are combined to create a composite score
, scale score
mean= 10 SD=3
T scores
mean=50 SD=10
what is a percentile rank?
percentage of normative group that earned a raw score less than or equal to the test
taker's score
if you score in the 50th percentile, you scored 50th better than others
TRUE
what is true about percentile ranks?
-parents may misinterpret percentile ranks
-distance between ranks is not even
What is age-equivalent score?
average age at which that raw score occurs in normative population
what is the minimum total number of people we want in a normative group?
1000 in total, 100 per age group
what is reliability?
how much error is in the measure; consistency across time
reliability co-efficient = r
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