Edutorial

In the student edition of this issue of your Scholastic magazine, you'll find a special "advertising edutorial" brought to you by Scholastic and the U.S. Department of Transportation's National Highway Traffic Safety Administration.

Political advertising made increasing use of entertaining 'sound bites', and 'infomercials' and 'edutorials' proliferated.

Adding to the onslaught in recent years are clever, premeditated e-mail 'edutorials' designed to snare innocent new moms and dads with modems.

The first part of this edutorial aims to introduce the principal types of bias that may typically affect clinical research. The second part will deal with the concept of confounding.