RE: Independent and Dependent Variables

[Wuensch, Karl L]

Here are the key points (in my mind) made by respondents to my query: Use the terms "independent variable" and "dependent variable" only with experimental research.  With nonexperimental research use "predictor variable" and "criterion variable." "Independent variables" temporally precede "dependent variables." The "independent variable" is the one that you think of as causal, the "dependent variable" is the one that you think of as being affected by the "independent variable." It is helpful to distinguish between "manipulated independent variables" and "measured dependent variables." At some point in the class, it may be helpful to get out all of the various terms used to describe research variables (such as independent variable, explanatory variable, predictor, regressor, covariate, concomitant variable, nuisance variable, control variable, dependent variable, response variable, criterion, etc.) and discuss them. The way the terms "independent variable" and "dependent variable" are used these days causes much confusion and some mischief. Being fastidious about mere vocabulary is unlikely to help. Even the most fastidious experimental psychologists' views of what does, in fact,  warrant causal inference is so naive and outdated as to not really be worth defending so vigorously.   More detail at http://core.ecu.edu/psyc/wuenschk/StatHelp/IV-DV.htm .  Thanks to all who responded.   Karl W. From: Wuensch, Karl L Sent: Tuesday, June 22, 2004 2:13 PM To: Teaching in the Psychological Sciences Subject: Independent and Dependent Variables    Researchers frequently use the terms "independent variable" and "dependent variable" when describing variables studied in their research.  I am of the opinion that these terms are frequently used inappropriately.  I am very interested in learning how YOU define these terms to students in your classes.     Please respond off-list to [EMAIL PROTECTED].  I shall post to the list a summary of responses received.  Thanks a bunch. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Karl L. Wuensch, Department of Psychology, East Carolina University, Greenville NC  27858-4353 Voice:  252-328-4102     Fax:  252-328-6283 [EMAIL PROTECTED] http://core.ecu.edu/psyc/wuenschk/klw.htm --- You are currently subscribed to tips as: [EMAIL PROTECTED] To unsubscribe send a blank email to [EMAIL PROTECTED]