About This Product
The TELD-3 was built to ensure excellent psychometric qualities like the following:
- Demographics: Standardized on 2,217 children and representing 35 states, the TELD-3’s normative population is clearly representative of the U.S. population as reported in the 1997 Statistical Abstract of the United States (U.S. Bureau of the Census, 1997). In addition, the TELD-3 compares favorably to the projected year 2000 demographic characteristics.
- Reliability: Extensive studies of test reliability (coefficient alpha, test-retest, immediate test-retest with equivalent forms, and interscorer) support the use of the TELD-3 with individual students.
- Validity: Content-description validity was established through careful selection of items, controlled vocabulary, construct review by a panel of language experts, conventional item analysis, differential item functioning analysis, and form equivalence. Criterion-prediction validity was established by correlating TELD-3 standard scores with a variety of widely recognized measures of language ability (i.e., CELF Preschool, EOWPVT, PLS-3, PPVT-Revised, ROWPVT, and TOLD-P:3). Construct-identification validity was established by studying (a) the relationship of the TELD-3 standardized scores with age, IQ, and academic achievement and (b) the ability of the TELD3’s standard scores to differentiate groups with known language problems from those without such problems.
- Limiting bias: Given the general concern with potential bias in test items, the TELD-3 was examined to ensure that little or no bias relative to gender, disability, racial, socioeconomic, or ethnic groups existed. The TELD-3 was examined using differential item functioning techniques. Further, a wide range of both mainstream and minority populations, including gender, racial, ethnic, linguistic, and disability categories, was included in the normative sample. Finally, reliability and validity information is provided for different mainstream and minority subgroups.
- The TELD-3 now has two subtests: Receptive Language and Expressive Language.
- Normative information is reported with respect to geographical residence, gender, race, ethnicity, education, and socioeconomic status, and it is stratified by age.
- Studies showing the absence of gender, ethnic, disability, and racial bias have been included.
- Pictures are now presented in color to make them more attractive to children.
- Standard scores (with a mean of 100 and a standard deviation of 15) and percentiles are provided for subtest and composite scores. Age equivalent scores also are reported for the subtests.
- The TELD-3 was built in accordance with the American Psychological Association’s guidelines for test construction.
- The test is quick and easy to administer and score. The attractive pictures and content, along with the untimed nature of the items, allow for optimal assessment.
- The kit now includes all the manipulatives you need.