The Chemistry Achievement Test used showed a KR-20 reliability of 0.78¶
Claim · All claims
Evidence · 1 study · causalr2·q2
Currency · newest study 2018 · not yet checked against its sources · not reviewed by a person · overdue for a recheck since 2021: tool and model accuracy changes quickly
Subclaims¶
Reading the evidence codes
q is the design tier, i the impact, n the sample, and the kind with its r
the rigour judged within that kind: what each code means.
This claim: no standardized effect is recorded in observations/ for it yet, so no benchmark reading is possible.
q2 i? The 25-item teacher-made Chemistry Achievement Test yielded a Kuder Richardson 20 coefficient of 0.78. → Okwuduba Emmanuel Nkemakolam; Offiah Francisca Chinelo; Madichie Chinyere Jane 2018
Evidence¶
Okwuduba Emmanuel Nkemakolam; Offiah Francisca Chinelo; Madichie Chinyere Jane 2018¶
Okwuduba Emmanuel Nkemakolam; Offiah Francisca Chinelo; Madichie Chinyere Jane (2018). Effect of Computer Simulations on Secondary School Students’ Academic Achievement in Chemistry in Anambra State. Asian Journal of Education and Training, 4(4): 284-289. https://doi.org/10.20448/journal.522.2018.44.284.289
q2 · i? · causal · r2
Instrument-development report: the CAT's content validity was established with a table of specification across knowledge, comprehension and application, and reliability was pilot tested in another zone over one week.
"Reliability of the CAT was established using Kuder Richardson 20 (KR- 20) because the items were dichotomously scored and this yielded a coefficient of 0.78. CAT has a total of 25 multiple choice questions on Gas Laws, State of Matter and Kinetic theories of gases."
Discussion¶
Related Claims¶
- The 16-item CT–PCK Survey shows internal consistency reliability around .71–.72 and person separation reliability of .69 — related
- The objective-based AI literacy assessment demonstrates psychometric stability with high reliability (KR-20 = 0.862) and approximate unidimensionality — related
- Mastery learning instruction produced significantly higher post-test achievement in quantitative chemistry than conventional teaching among Senior Secondary 2 students — related
- The researcher-built two-stage Mixtures Achievement Test showed high reliability in the pilot and research groups — related
- The 60-item grammar post-test showed KR-21 reliability of 0.94 and a moderate criterion-related validity correlation of 0.41 with the Nelson grammar total — related
- The Basic Technology Achievement Test (BTAT) showed reliability coefficients of 0.84 (KR-21) and 0.88 (KR-20) — related
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