Well, I'll go for some very limited input:
They divided their subjects into thirds based on pre-experimental BMI. They found that that for the heaviest third, lo and behold, there was a significant post-treatment drop in BMI compared with the control group.
Ah! a regression to the mean? And I wonder if they tried halves, quartiles, etc. before hitting on the analysis they wanted?
So I asked them politely for the raw data to do my own analysis. They refused. Given that the APA explicitly tells its authors to fill such requests promptly and cooperatively (or something like that), that doesn't seem too welcoming of them. does it?
Yes, but they didn't publish in an APA journal; I suppose other "sciences" have different criteria.
Ebberling, C. et al (2006). Effects of decreasing sugar-sweetined beverage consumption on body weight in adolescents: a randomized, controlled pilot study. Pediatrics 117, 673--
Well, that's about it for my insightful comments, but I will discuss this with a colleague later this week.
Annette Annette Kujawski Taylor, Ph. D. Professor of Psychology University of San Diego 5998 Alcala Park San Diego, CA 92110 619-260-4006 [EMAIL PROTECTED] ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program. --- To make changes to your subscription go to: http://acsun.frostburg.edu/cgi-bin/lyris.pl?enter=tips&text_mode=0&lang=english
