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9 Cards in this Set
- Front
- Back
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Transformed Standard Scores (Definition) |
Linear conversion of z-scores into a different scoring system with a new and arbitrarily chosen mean and standard deviation. |
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Like Z-Scores, a standard score... |
Reflects the distance of a raw score in standard deviation units from the comparison group's mean. |
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Common Transformed Scores (Formula) |
Standard Score = s(z) + m |
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Common Transformed Scores (Examples) |
T-Scores = (z) 10 + 50 ACT = (z) 15 + 20 SAT+ (z) 100 + 500 IQ = (z) 15 + 100 |
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Percentile Rank (Definition) |
Scores that range from 1-99 and refer to the percentage of people in the normative group who score at or below a particular raw score |
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Percentile Ranks (Example) |
A percentile of 84, means that 84% of the norm group scored at or below the examinee's score. |
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Percentile Ranks (Potential Problems) |
Not synonymous with the percentile "right score". Percentile ranks provide ordinal level data (i.e. the intervals between the percentile ranks are not equal). Consequently, these rankings cannot be submitted to basic mathematical operations. |
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Grade Equivalent Scores (Procedure) |
A test is administered to students in successive groups. The median or average scores for students in each group is calculated and becomes the corresponding grade equivalent for all students in the grade. |
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Grade Equivalent Scores (Limitations) |
Only meaningful when applied to variables that shoe clear developmental trends. Standard deviations increase systematically with grade level creating a lack of uniform meaning across grade levels. |
