Maps phase labels to their design role after lower-casing, trimming, and
stripping a trailing occurrence number together with an optional
separator, so "Baseline 1", "A_1", "A-1",
"A.1", and "A1" all read as baseline.
Value
Numeric vector of the same length: 0 for the baseline role
(baseline, a, bl, bsl, pre, 0,
withdrawal, return, reversal, control,
wait, waitlist, wl), 1 for intervention (b,
treatment, treat, tx, trt,
intervention, reinstatement, post, 1), 2 for
maintenance (m, maintenance, 2), 3 for
generalization (g, generalization, gen, 3),
and NA for any other label. probe has no fixed role: a
probe can be a baseline, maintenance, or generalization session.
Examples
phase_role(c("Baseline 1", "Treatment 1", "A_2", "B-2", "M", 0, "Tx", "Probe"))
#> [1] 0 1 0 1 2 0 1 NA