Survey Reliability & Multivariate
Validate your questionnaire: internal consistency (Cronbach's α), factorability (KMO & Bartlett) and dimension reduction (PCA / factor analysis). Runs entirely in your browser.
One respondent per line; each item's score separated by space or comma. Columns = survey items.
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Guidelines: Cronbach's α ≥ .70 is generally acceptable. KMO should be ≥ .60 and Bartlett's test significant (p < .05) before running factor analysis. Components with eigenvalue > 1 are retained (Kaiser criterion); loadings ≥ .50 are considered meaningful.