1 Correction to: Behaviormetrika (2022) 49:91–130 https://doi.org/10.1007/s41237-022-00158-y

The article “The effect of various simultaneous sources of mechanical error in the estimators of correlation causing deflation in reliability: seeking the best options of correlation for deflation-corrected reliability”, written by Jari Metsämuuronen, was originally published Online First without Open Access. After publication in volume 49, issue 1, page 91–130 the author decided to opt for Open Choice and to make the article an Open Access publication. Therefore, the copyright of the article has been changed to © The Author(s) 2022 and the article is forthwith distributed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

In addition, the following affiliation “Centre for Learning Analytics, University of Turku, Turku, Finland” was missing and included in this correction.

The original article has been updated.