=========================================================================
Date:         Thu, 13 Jul 2006 09:57:03 +0300
Reply-To:     alexwin@MAIL.UNIV.KIEV.UA
Sender:       "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From:         alexwin@MAIL.UNIV.KIEV.UA
Subject:      Re: percentile scores
Comments: cc: humphreyyy1000@yahoo.com

Small corrections: to obtain percentile scores using formulas described in psychometric literatuire (see, for instance, Crocker, L., & Algina, J. (1991). Introduction to classical and modern test theory. Orlando, FL: Harcourt Brace Jovanovich.), I would use slightly different options:

1)    Under the Transform menu, choose Rank Cases&#8230;
2)    Choose the variable containing the raw test scores
3)    Click on the Ties&#8230; box and choose MEAN as the Rank Assigned to Ties
4)    Click on the Rank Cases: Types&#8230; box and Check Fractional rank as %
5)    Check Rankit under Proportion Estimation Formula
6)    Uncheck Rank (Unless you want cumulative frequencies)
7)    Click on OK


Dr. Alexander Vinogradov, Associate Professor
Sociology and Psychology Faculty
National Taras Shevchenko University
Ukraine

>> Statisticsdoc <statisticsdoc@cox.net> wrote: Humphrey,

>> There are two ways to compute percentile scores in SPSS:

>> You can use menus to compute percentile ranks as follows:

>> 1.)    Under the Transform menu, choose Rank Cases&#8230;
>> 2.)    Choose the variable containing the raw test scores
>> 3.)    Click on the Ties&#8230; box and choose High as the Rank Assigned to Ties
>> 4.)    Click on the Rank Cases: Types&#8230; box and Check Fractional rank as %
>> 5.)    Uncheck Rank (Unless you want cumulative frequencies)
>> 6.)    Click on OK
>> 7.)    SPSS will label the variable that contains the percentile ranks "PCT001".