Each question was a 5-point Likert item from "strongly disagree" to "strongly agree". SPSS Statistics ExampleĪ researcher has devised a nine-question questionnaire to measure how safe people feel at work at an industrial complex. If you are concerned with inter-rater reliability, we also have a guide on using Cohen's (κ) kappa that you might find useful. It is most commonly used when you have multiple Likert questions in a survey/questionnaire that form a scale and you wish to determine if the scale is reliable. Cronbach's Alpha (α) using SPSS Statistics IntroductionĬronbach's alpha is the most common measure of internal consistency ("reliability").
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