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Direct linkPetscher, Yaacov; Connor, Carol McDonald; Al Otaiba, Stephanie – Assessment for Effective Intervention, 2012
This study investigated the psychometrics of the "Diagnostic Evaluation of Language Variation-Screening Test" (DELV-S) test using confirmatory factor analysis, item response theory, and differential item functioning (DIF). Responses from 1,764 students in kindergarten through second grade were used in the study, with results indicating…
Descriptors: Diagnostic Tests, Screening Tests, Language Variation, Psychometrics
Okamoto, Yukari; Curtis, Reagan; Jabagchourian, John J.; Weckbacher, Lisa Marie – High Ability Studies, 2006
Two studies were conducted to explore mathematical precocity in young children. Study 1 examined mathematically gifted first and third graders' working memory development. The results showed that mathematically gifted children's working memory growth was similar to that expected of their age peers. Study 2 examined changes in mathematically gifted…
Descriptors: Young Children, Intellectual Development, Gifted, Memory
