Date: Tue, 10 Dec 2002 13:08:39 +0100 Reply-To: Dirk Enzmann Sender: "SPSSX(r) Discussion" From: Dirk Enzmann Organization: Kriminologisches Forschungsinstitut Hannover e.V. Subject: Re: Grading Scale Conversion Comments: To: "SPSSX(r) Discussion" Content-Type: text/plain; charset=us-ascii A more general solution is: POMP = [(observed - minimum)/(maximum - minimum)]*100. (POMP = percent of maximum possible) BTW, in this but also other contexts the following article might be interesting: Cohen, P., Cohen, C., Aiken, L.S., & West, S.G. (1999). The problem of units and the cirumstance for POMP. Multivariate Behavioral Research, 34, 315-346. Cohen et al. discuss advantages and disadvantages of constructing scores as sum scores, average item scores, z-scores, and POMPs and show that in most cases POMPs are cleary to be preferred. For multi-items scales POMPs can easily created with SPSS syntax. For example, if you are using a five point Likert scale (1 = minimum, 5 = maximum) with 15 items and want to allow a maximum of two items with missing values, the SPSS syntax would be: compute pomp = ((mean.13(item01 to item15) - 1)/4)*100. ----------------------------------------------------- Harding Faulk wrote: > Can anyone out there is SPSS land share with me the your syntax statement for converting a 4.00 grading > scale to 0-100 grading scale. -- ************************************************* Dr. Dirk Enzmann Criminological Research Institute of Lower Saxony Luetzerodestr. 9 D-30161 Hannover Germany phone: +49-511-348.36.32 fax: +49-511-348.36.10 email: ENZMANN@KFN.uni-hannover.de http://www.kfn.de *************************************************

Back to: Top of message | Previous page | Main SPSSX-L page