The Psychometrician’s Handbook / Interactive / Correlations / Within and between subjects

Interactive · from Volume 1

Within and between subjects

Thirty-eight patients, four visits each, financial toxicity against symptom burden. Depending on which correlation you compute, the same data say the relationship is positive, negative, or barely there.

Total--
Within--
Between--

Total ignores the nesting. Within uses each patient's deviations from their own mean. Between uses one average per patient.

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