Journal of Neurology Neurosurgery & Psychiatry · 2019 · 69 citations · 23 references
The self-administration version of the ALSFRS-R demonstrates high reproducibility and can be used in apps and online portals for both individual comparisons, facilitating the management of clinical care and group comparisons in clinical trials.
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R: A Language and Environment for Statistical Computing
R Core Team · 2000 · 352.8K citations · Full text
Coefficient Alpha and the Internal Structure of Tests
Lee J. Cronbach · Psychometrika · 1951 · 42.3K citations · Full text