Running Power Simulations with the Power of R! Middot; 4 comments. This is partly because more psychology journals are requiring explicit discussions about statistical power. The problem is that if you do studies that require analyses anything more complicated than a. Middot; Leave a comment. Middot; Leave a comment.

Heres a second video in a series by Pew Research. This 5 minute clip describes some of the issues in writing good questions for an opinion poll. It basically summarizes the first part of Chapter 6, and provides some new, concrete examples. You can use this in combination with Pews f irst video about random sampling, which I described here.

Thoughts about the mind, science, society, and whatever else. The following is a guest post by Neil Lewis, Jr. Neil is an assistant professor at Cornell University. Last week I visited the Center for Open Science. In Charlottesville, Virginia to participate in the second annual meeting. Of the Society for the Improvement of Psychological Science.

Dept of Psychology at UC Riverside. I have found that even experts have to look it up every time they use it. However, the principles behind the formula are important.

My blog about research in soft psychology and random musings on whatever. Alpha and Correlated Item Residuals. I did this quickly so I might have made a mistake! Using this approach, I estimated reliability for my sample of 1,000 t.

If testing a specific hypothesis, pre-register your research. So others can know that the forthcoming tests are informative. Report the planned analyses as confirmatory, and report any other analyses or any deviations from the planned analyses as exploratory. To the best of your ability maximize the power of your research to reach the power necessary to test the smallest effect size you are interested in testing.