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Under Omitted Item Statistics, the software recalculates Cronbach’s alpha after removing an item. If omitting an item substantially increases Cronbach’s alpha, consider removing that question from the instrument because it is suspect. Removing Item 4 causes Cronbach’s alpha to increase from to

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Jun 07,  · Cronbach’s alpha is a statistic commonly quoted by authors to demonstrate that tests and scales that have been constructed or adopted for research projects are fit for purpose. Cronbach’s alpha is regularly adopted in studies in science education: it was referred to in 69 different papers published in 4 leading science education journals in a single year .