00875cam a22002531  4500001001300000003000400013005001700017008004100034010001700075035002000092040005300112042001200165050001800177100003500195245008200230260006700312300003200379490007600411504002500487650001300512650003900525650003500564650002200599e  31000712 DLC20260227111221.0850627s1931    nyua     b   s000 0 eng c  ae  31000712   a(OCoLC)12208389  aLibrary, U.S. Office of EducationcKyUdKyUdDLC  apremarc00aLB3061b.C6471 aCornell, Ethel Letitia,d1892-14aThe effect of trait differences in ability grouping,cby Ethel L. Cornell ...  aAlbany,bThe University of the State of New York Press,c1931.  a26, [2] p.bdiagrs.c23 cm.0 aUniversity of the state of New York bulletin ...vno. 981. Oct. 1, 1931  a"References": p. 26. 0aAbility. 0aEducational tests and measurements 0aGrading and marking (Students) 0aAbilityxTesting.