Blind computational reproduction of published statistical analyses with MerQur — Study 1: ten analysis families. Second round with MerQur 2.4.1, R and SAS (preregistration)

his document preregisters the second round of Study 1 of a blinded computational reproduction programme for MerQur, a free statistical software package. Twenty articles published in 2025-2026 with openly licensed raw data, two in each of ten analysis families, are re-analysed, blind to the published results, by three independent analysts using MerQur 2.4.1 (frozen at code commit b35ff79da354f93fb2b0d64f9ed6778ff4eb3e62), R and SAS; every reported value is classified with a predefined decision tree. The Study 1 registration text (OSF project https://osf.io/bj43h) and protocol are deposited with this record. First-round results are not used. No second-round analysis had been run at the time of this deposit.