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Until the development of tau-equivalent reliability, split-half reliability using the Spearman-Brown formula was the only way to obtain inter-item reliability. [4] [5] After splitting the whole item into arbitrary halves, the correlation between the split-halves can be converted into reliability by applying the Spearman-Brown formula.
Cronbach's alpha (Cronbach's ), also known as tau-equivalent reliability or coefficient alpha (coefficient ), is a reliability coefficient and a measure of the internal consistency of tests and measures.
Reliability does not imply validity.That is, a reliable measure that is measuring something consistently is not necessarily measuring what is supposed to be measured.
The city of Minneapolis has agreed to pay $600,000 to settle a lawsuit by a woman who alleged that ex-Officer Derek Chauvin hauled her from her minivan and pinned her to the ground with his knee ...
Often discussed in tandem with KR-20, is Kuder–Richardson Formula 21 (KR-21). [4] KR-21 is a simplified version of KR-20, which can be used when the difficulty of all items on the test are known to be equal.
Alexander Zverev of Germany attends a press conference after his loss to Jannik Sinner of Italy following the men's singles final at the Australian Open tennis championship in Melbourne, Australia ...
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More than 1,500 people have been charged with federal crimes stemming from the siege that left more than 100 police officers injured and sent lawmakers running into hiding as they met to certify ...