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feat(matlab): add 0-13 day window (lme_*_d0_13) + coverage warning

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Box-A2 has no data past ~day 13, so the full-range days x tDCS interaction
extrapolates A2's slope and is confounded (spuriously significant, wrong sign).
Add the _d0_13 window (equal anchor coverage) and a report warning when the two
groups' day coverage is unequal. In the fair 0-13 window the interaction is n.s.
with a POSITIVE slope diff and the Day-1 tDCS effect is n.s. -- matching the
paper's 'equal on Day 1' direction (underpowered at n=8). Suite 32/32.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Experiments DB Dev
2026-07-20 09:58:19 -04:00
parent f0ce978bd4
commit 89bb95088f
6 changed files with 51 additions and 7 deletions
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analysis/matlab/tdcs_lme.m
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@@ -36,6 +36,8 @@ A = anova(lme);
L.lme = lme;
L.nSubjects = numel(unique(T.subject));
L.nObs = height(T);
L.maxDayA = max(T.day(T.group == cfg.anchorLow)); % last day Box-A2 has data
L.maxDayB = max(T.day(T.group == cfg.anchorHigh)); % last day Box-B2 has data
L.interaction = localTerm(C, A, 'day:tDCS');
L.day = localTerm(C, A, 'day');
L.tDCS = localTerm(C, A, 'tDCS');