Data analysis: Difference between revisions

Revision as of 11:30, 30 November 2015

Revision as of 12:53, 30 November 2015

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The quality of the [[measuring instrument|measurement instruments]] should only be checked during the initial data analysis phase when this is not the focus or research question of the study. One should check whether structure of measurement instruments corresponds to structure reported in the literature.<br />

There are two ways to assess measurement

*Analysis of homogeneity ([[internal consistency]]), which gives an indication of the [[Reliability (statistics)|reliability]] of a measurement instrument. During this analysis, one inspects the variances of the items and the scales, the [[Cronbach's alpha|Cronbach's α]] of the scales, and the change in the Cronbach's alpha when an item would be deleted from a scale.<ref>Adèr, 2008, p. 341-3342>.</ref>

====Initial transformations====