Nothing hard to understand about it; you dummy code a dichotomous variable and correlate it with a continuous one. On test items, you can dummy code a question as right/wrong and correlate it with test scores to see if people who get it right tend to do better on the test. ________________________________ From: michael sylvester [msylves...@copper.net] Sent: Monday, October 12, 2009 4:45 AM To: Teaching in the Psychological Sciences (TIPS) Subject: [tips] Help! point biserial
I never did understand the point-biserial statistic.I came across it at Mizzou when I was in charge of grading lots of scantrons.It had something to do with test items but I never figured out why. Michael (omnicentric) Sylvester,PhD Daytona Beach,Florida --- To make changes to your subscription contact: Bill Southerly (bsouthe...@frostburg.edu) --- To make changes to your subscription contact: Bill Southerly (bsouthe...@frostburg.edu)
