1. Standardized Testing (1) EDU 330: Educational Psychology Daniel Moos

4. Statistics and standard scores (2) Standard Deviation (SD): Statistical measure of spread of scores If data points are close to mean, then SD � 0 If many data points are not close to mean, then SD >

5. Statistics and standard scores (3) Standard Deviation (SD): Translating into percentile ranks Example: Mean of scores is 80 and standard deviation of 6

6. Statistics and standard scores (4) Evaluating standardized tests through descriptive statistics, continued Standard Error of Measurement Due to measurement error, scores represent an approximation of student�s �true� score Example: Tonka obtains a score of 80 on a standardized test. Standard error of measurement is 6 The range of Dan�s true score would be 74 to 86.

7. Statistics and standard scores (5) Raw Scores: What do they really mean? Percentiles: ? percentages Rankings are not equal (e.g., raw score of 58 = 90th percentile, raw score of 56 = 80th, 54 = 60th, 53 = 50th) Stanines: Range: 1 to 9 Stanine 5 = center of distribution Each Stanine above/below is +/- 0.5 SD Example: Stanine 7 = +1 SD; Stanine 3 = -1 SD; Stanine 8 = __SD Grade equivalents: Compares scores with particular age group (1st digit = grade, 2nd digit = month) Example: Grade equivalent for total reading of 8.4 means __ ?

9. Suggestions for preparing your students for taking standardized tests(1)

10. Suggestions for preparing your students for taking standardized tests(2)

11. Standardized Testing &Technology