Descriptor
Achievement Tests | 2 |
Error of Measurement | 2 |
Mathematical Formulas | 2 |
Comparative Analysis | 1 |
Difficulty Level | 1 |
Discriminant Analysis | 1 |
Grade 7 | 1 |
Grade 9 | 1 |
Junior High Schools | 1 |
Mathematical Models | 1 |
Secondary School Mathematics | 1 |
More ▼ |
Source
Educational and Psychological… | 2 |
Author
Feldt, Leonard S. | 1 |
Wilcox, Rand R. | 1 |
Publication Type
Journal Articles | 2 |
Reports - Research | 2 |
Education Level
Audience
Location
Laws, Policies, & Programs
Assessments and Surveys
What Works Clearinghouse Rating
Peer reviewed
Feldt, Leonard S. – Educational and Psychological Measurement, 1984
The binomial error model includes form-to-form difficulty differences as error variance and leads to Ruder-Richardson formula 21 as an estimate of reliability. If the form-to-form component is removed from the estimate of error variance, the binomial model leads to KR 20 as the reliability estimate. (Author/BW)
Descriptors: Achievement Tests, Difficulty Level, Error of Measurement, Mathematical Formulas
Peer reviewed
Wilcox, Rand R. – Educational and Psychological Measurement, 1980
Using three sets of real data, a comparison of four discrete discriminate analysis procedures is made using the actual versus the optimal error rate. The kernel method gives the most accurate results in all three cases. (Author/RL)
Descriptors: Achievement Tests, Comparative Analysis, Discriminant Analysis, Error of Measurement