Can you help? Surely someone has written about this question? Please let me know where! In the paired design, the two measures, for example Pretest and Posttest, are usually positively correlated. The SD of the paired differences (sdiff), is usually …

The Simple Paired Design: How Does the Correlation Relate to SD(diff)? Read more »

(Revised 18 March 2022, to add comments about replication, and the effectiveness of journal-specific guidelines, and badges.) What Progress With Open Science? In Brief: Judging from Psychological Science (PS) and the Journal of Experimental Psychology: General (JEPG), during 2013-2020: Reporting …

Open Science Practices: Patchy Progress in Two Psychology Journals Read more »

In 2017, I (Bob) attended a National Academies of Science conference on reproducibility in science. Among many memorable events, I saw a talk by David Allison about his efforts to correct simple statistical mistakes in the published literature. He would …

The joke of self-correcting science: The Andero lab and Nature Communications Read more »

I woke on Christmas morning to a message from Bob with this link, to this editorial: Not just a single journal, but journal editors for a whole discipline! Here’s the first para, highlights added: Null hypothesis statistical tests are often …

Hallelujah! Physiotherapists Join the Christmas Choir of Estimation Angels! Read more »