Skip to content

Scientific article library

An organized route through method tutorials, interpretation guidance, independently auditable research and negative results. Articles explain a specific question, the assumptions behind it and its evidence boundary; they do not turn experimental methods into stable product APIs.

Published software versus research

Stable 1.2.0 is now the current PyPI release, including ten transparent module-scoped workflows. E1–E4 helpers remain experimental. W3 studies and their original/independent archives do not establish general 90% simultaneous confidence-band calibration or field identification of observation-dependent missing gaze.

Start with the scientific method

  • Which trajectory analysis should I choose?

Functional PCA, paired sparse MFPCA, repeated-trial regression, generalized responses and recurrence.

Choose among ten workflow families · Input representations

  • How should I read a figure?

Component alignment, effect functions, covariance diagnostics and explicit recurrence parameters.

Interpret synthetic workflow figures · Scientific figure atlas

  • How should a study be reproduced?

Model contracts, input audit, declared choices and portable reproducibility bundles.

Reproducible bundles · Research source reproduction

  • Which evidence actually qualifies a claim?

Distinguish a passing execution, an independently replayed archive, identifiability, interval coverage and released product readiness.

Evidence versus qualification

Functional inference under stress (R76–R81)

Question Read
Why can nominal whole-function bands under-cover? Whole-band coverage interpretation
What if predictor leverage is concentrated? R76 independent leverage support
Does fixed covariance regularization help? R77 regularization
What if errors are temporally dependent? R78 time-varying AR(1)
What if coordinate covariance is nonseparable? R79 bivariate covariance
What if independent units are heavy-tailed or asymmetrically contaminated? R80 Student-t5 · R81 skewed shocks

These synthetic inclusion proportions are tied to registered data-generating laws and are not universal estimates of nominal coverage.

Observation-dependent missing gaze and external validation (R82–R88)

Question Read
Can high gaze retention conceal insufficient functional support? R82 observation process
Are signed MNAR sensitivity parameters empirically identified? R83 selection sensitivity
When can genuinely new missing-outcome measurements identify a restricted model? R84 external validation
What if secondary validation is itself selective? R85 secondary return
Can randomized audits of validation failures help? R86
What if randomized audit returns still depend on the missing outcome? R87 · R88

Sharp bounds and identification (R89–R95)

These studies increasingly separate new observed information from assumptions about unreturned values.

Stage Central finding Method detail
R89 Observed-only finite-population bounds Sharp-bound methods
R90 Assignment saturation does not ensure actual response Saturation analysis
R91 Completed randomized recovery as a distinct design Design-based methods
R92 Selective return can bias nominal weighting Conditional-bias methods
R93 Exact same observed law permits different latent means Exact proof
R94 Sharp mean sets under externally justified completion floors Fraction methods
R95 Known return direction narrows; unknown sign does not Exact independent derivation

Interpret identification bounds · Compare the R93–R95 assumption ladder and widths · Research study map

Exact normalized sharp-set widths, each conditional on a different external return assumption

More research and validation context

The independent source and figure ledgers document original artifacts and numerical audit denominators. Read Bayesian feasibility boundaries, authentic gaze usability and interpreting W3 source audits for adjacent research questions.

Research blockers remain open: #289 (simultaneous inference) and #296 (observation-dependent missing gaze). Release status · News