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Changelog

All notable changes to this project are documented in this file.

[Unreleased]

Added

  • Added executable specs for README usage examples to keep the documented Rasch, 2PL, 3PL, and missing-data flows aligned with the public API.

Changed

  • Added CI RuboCop and gem package build/install verification, and documented the local quality and packaging commands for contributors.
  • Clarified that response data must be a Matrix or array of arrays containing only integer 0, integer 1, or nil; floats, strings, booleans, and other values are rejected.

[0.3.0] - 2025-01-14

Changed

  • Code Quality
    • Updated RuboCop configuration to handle new cops and resolve style warnings
    • Fixed operator precedence ambiguity in Three-Parameter Model calculations
    • Added MFA requirement to gemspec metadata (RuboCop requirement)

Notes

  • This release maintains full backward compatibility with previous versions
  • All 46 existing tests continue to pass
  • Comprehensive performance benchmarking suite remains available via bundle exec rake benchmark:all

[0.2.0] - 2025-03-01

Added

  • Missing Data Strategies

    • Introduced a missing_strategy parameter for Rasch, TwoParameterModel, and ThreeParameterModel to handle nil responses:
      • :ignore (default) – skip missing responses in log-likelihood and gradients.
      • :treat_as_incorrect – interpret nil as 0.
      • :treat_as_correct – interpret nil as 1.
    • Updated RSpec tests to cover each strategy and ensure graceful handling of missing responses.

  • Expanded Test Coverage

    • Added tests for repeated fits, deterministic seeding, larger random datasets, and new edge cases (all-correct/all-incorrect).
    • Improved specs for parameter clamping (discriminations, guessing in 2PL/3PL).

  • Adaptive Learning Rate Enhancements

    • Enhanced convergence checks combining log-likelihood changes and average parameter updates.
    • Clearer revert-and-decay logic if the likelihood decreases on a given step.

Changed

  • Documentation / README
    • Updated the README to reflect new missing data strategies, advanced usage (adaptive learning rate, parameter clamping), and test instructions.
    • Added examples showcasing how to set missing_strategy for each model.

Notes

  • This release remains backward-compatible with 0.1.x in terms of existing usage; the default :ignore missing-data approach matches prior behavior.
  • If upgrading, simply update your gem and enjoy the new features.
  • For more details, see the updated README and expanded test suites.