I fear I'm coming late to the party, but do find this useful: http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&sqi=2&ved=0CCkQFjAA&url=http%3A%2F%2Foak.ucc.nau.edu%2Frh232%2Fcourses%2FEPS625%2FHandouts%2FData%2520Transformation%2520Handout.pdf&ei=GpSGUvTxG8aI3AXGg4C4Cg&usg=AFQjCNEj_VHiueIGnPTfv4eLFEYd6Zlj3g&bvm=bv.56643336,d.b2I
I can't attest to the validity of these transformations, though: it's a wee bit beyond my ken. m -- Marc Carter, PhD Associate Professor of Psychology Chair, Department of Behavioral and Health Sciences College of Arts & Sciences Baker University -- > -----Original Message----- > From: Michael Britt [mailto:[email protected]] > Sent: Monday, November 11, 2013 12:01 PM > To: Teaching in the Psychological Sciences (TIPS) > Subject: [tips] What to do with skewed data > > I did a survey which asked respondents how satisfied they are in their > current (romantic) relationship on a 1=10 point scale (where 10="very > satisfied). While there was some variation, not surprisingly, the > results are strongly negatively skewed. That makes sense - most people > are probably satisfied with their relationships or they would leave the > other person (or there's some form of cognitive dissonance going on, > but that's not my question. > > No matter how big the sample size (mine was 160 respondents) I assume > you'll always get a skewed distribution on a question like this so > wouldn't I be breaking the normalization assumption if I were to do > correlations using these results? I assume I could either do: a) do > some kind of transformation - but I've never done one before so I'm not > familiar with it, or b) recode the data into 3 categories (perhaps 1-5 > is low satisfaction, 6-7 is moderate and 8-10 is high) and do a chi- > squre instead of a correlation. > > Any thoughts? Appreciate it. > > Michael > > Michael A. Britt, Ph.D. > [email protected] > http://www.ThePsychFiles.com > Twitter: @mbritt > > > --- > You are currently subscribed to tips as: [email protected]. > To unsubscribe click here: > http://fsulist.frostburg.edu/u?id=13029.76c7c563b32ad9d8d09c72a2d17c90e > 1&n=T&l=tips&o=30023 > or send a blank email to leave-30023- > [email protected] The information contained in this e-mail and any attachments thereto ("e-mail") is sent by Baker University ("BU") and is intended to be confidential and for the use of only the individual or entity named above. The information may be protected by federal and state privacy and disclosures acts or other legal rules. If the reader of this message is not the intended recipient, you are notified that retention, dissemination, distribution or copying of this e-mail is strictly prohibited. If you have received this e-mail in error please immediately notify Baker University by email reply and immediately and permanently delete this e-mail message and any attachments thereto. Thank you. --- You are currently subscribed to tips as: [email protected]. To unsubscribe click here: http://fsulist.frostburg.edu/u?id=13090.68da6e6e5325aa33287ff385b70df5d5&n=T&l=tips&o=30161 or send a blank email to leave-30161-13090.68da6e6e5325aa33287ff385b70df...@fsulist.frostburg.edu
