Qhov zoo KR 20 yog dab tsi?
Qhov zoo KR 20 yog dab tsi?

Video: Qhov zoo KR 20 yog dab tsi?

Video: Qhov zoo KR 20 yog dab tsi?
Video: Yuav nco wb qhov zoo zoo mus ib sim by Maiv Xis Hawj MV 19 9 2019 2020 2024, Kaum ib hlis
Anonim

KR - 20 Cov qhab nias

Cov qhab nias rau KR - 20 thaj tsam ntawm 0 txog 1, qhov twg 0 tsis muaj kev ntseeg siab thiab 1 yog kev ntseeg zoo tag nrho. Tsuas yog qhov tsim nyog "tsim" KR - 20 qhab nias nyob ntawm hom kev xeem. Feem ntau, tus qhab nia saum toj no. 5 feem ntau suav hais tias tsim nyog.

Hauv qhov no, KR 20 txhais li cas?

Hauv psychometrics, Kuder-Richardson Formula 20 ( KR - 20 ), thawj zaug luam tawm xyoo 1937, yog ib qho kev ntsuas ntawm qhov sib xws hauv kev ntseeg tau rau kev ntsuas nrog cov kev xaiv dichotomous. Nws yog feem ntau thov tias siab KR - 20 coefficient (piv txwv li,> 0.90) qhia txog homogeneous xeem.

Ib sab saum toj no, pes tsawg tus lej yog kr20? Cov KR (20 ), los yog Kuder-Richardson Formula, ntsuas kev ntsuas tag nrho. Qhov tseem ceeb nws ua rau koj paub seb qhov kev xeem no puas muaj kev ntxub ntxaug ntawm cov tub ntxhais kawm uas paub cov ntsiab lus thiab cov uas tsis ua. Cov KR (20 ) feem ntau nyob nruab nrab ntawm 0.0 thiab +1.0, tab sis nws tuaj yeem poob qis dua 0.0 nrog cov qauv me me.

Ua kom pom qhov no, Cronbach's alpha yog dab tsi?

Txoj cai ntawm tus ntiv tes xoo yog tias a Cronbach's alpha ntawm. 70 thiab siab dua yog zoo ,. 80 thiab siab dua yog zoo dua, thiab. 90 thiab siab dua yog qhov zoo tshaj plaws.

kr21 kev ntseeg yog dab tsi?

KR 21 = kwv yees kev ntseeg tau ntawm qhov kev xeem tag nrho. n = tus lej ntawm cov khoom. Var = variance ntawm tag nrho cov kev xeem (tus qauv sib txawv squared) M = txhais tau tias ntawm qhov kev xeem.

Pom zoo: