Re: REML for Dummies?

: http://www.wiley.co.uk/wileychi/eob/ John Uebersax, PhD (858) 597-5571 La Jolla, California (858) 625-0155 (fax) email: [EMAIL PROTECTED] Statistics: http://ourworld.compuserve.com/homepages

Re: factor Analysis

ACTOR)--perhaps also in the SPSS manual. John Uebersax, PhD (805) 384-7688 Thousand Oaks, California (805) 383-1726 (fax) email: [EMAIL PROTECTED] Agreement Stats: http://ourworld.compuserve.com/home

Re: Measure of Association Question.

n, the Spearman, or the polyserial correlation coefficients. Good luck! ---- John Uebersax, PhD (805) 384-7688 Thousand Oaks, California (805) 383-1726 (fax) email: [EMAIL PROTECTED] Agreement Stats: http://

Re: Most Frequently Used Clustering Algorithm

iables in > obervations I have got. Which is your goal: to find groups of similar objects (object cluster analysis), or to find groups of similar variables (variable cluster analysis)? John ---- John Uebersax, PhD

Re: Good Book on "Clustering Algorithm"??

Hartigan, J.A. (1975), Clustering Algorithms, New York: John Wiley & Sons, Inc. ---- John Uebersax, PhD (805) 384-7688 Thousand Oaks, California (805) 383-1726 (fax) email: [EMAIL PROTEC

Re: PCA source code

ou can find PCA code in f77 and C at Fionn Murtagh's "Multivariate Data Analysis Software and Resources Page": http://astro.u-strasbg.fr/~fmurtagh/mda-sw/ Hope this helps. John Uebersax ---- Joh

Definitions of Likert scale, Likert item, etc.

ttitude measurement; it seems reasonable to refer to such items as "Likert-type items", to distinguish them from strict Likert items as described above. If anyone has any definitive references that clarify this, I would greatly appreciate learning of them.

Re: Kappa negative, doubt?

rogram, see: http://ourworld.compuserve.com/homepages/jsuebersax/margin.htm http://ourworld.compuserve.com/homepages/jsuebersax/mcnemar.htm http://ourworld.compuserve.com/homepages/jsuebersax/mh.htm ---- John Uebersax, PhD

Re: Factor analysis - which package is best for Windows?

hanks John Uebersax, PhD (805) 384-7688 Thousand Oaks, California (805) 383-1726 (fax) email: [EMAIL PROTECTED] Agreement Stats: http://ourworld.compuserve.com/homepages/jsuebersax/agree.htm Latent Structure: http://ourworld.compuserve.com/homepages/jsuebersax Existential

Re: Factor analysis - which package is best for Windows?

ar more likely to use SAS PROC FACTOR than my own program. ---- John Uebersax, PhD (805) 384-7688 Thousand Oaks, California (805) 383-1726 (fax) email: [EMAIL PROTECTED] Agreement Stats: http://ourworld

Re: MDS, the radex, and indices of multidimensionality agreement

ariance in one structure explained by the other. Hope this helps. John ---- John Uebersax, PhD (805) 384-7688 Thousand Oaks, California (805) 383-1726 (fax) email: [EMAIL PROTECTED] Agreement Stats: htt

Re: Venn diagram program?

No I had more in mind: 1. The argument room and perhaps: 2. "Well I didn't expect the Spanish Inquisition" It's like asking a question like, "Excuse me, can you tell me how to get to First and Main Street," and getting 5 replies like "Oh come now, why would anybody want to go to First and M

Re: Venn diagram program?

and copy it into Word or whatever. ==== John Uebersax, PhD (805) 384-7688 Thousand Oaks, California (805) 383-1726 (fax) email: [EMAIL PROTECTED] Existential Psych: http://members.aol.com/spiritualpsyc

Re: Minimum n for CFA in SEM?

subject. John ==== John Uebersax, PhD (805) 384-7688 Thousand Oaks, California (805) 383-1726 (fax) email: [EMAIL PROTECTED] Existential Psych: http://members.aol.com/spiritualpsych Agreement Stats: http://ourworld.compuserve.com/homepages/jsueb

Venn diagram program?

). The diagram should show the area of each circle as proportional its N, and the overlap area as proprotional to the number of cases in both groups. Thanks in advance. John Uebersax John Uebersax, PhD (805

Re: likert scale items

inical trials research. (and now, off my soapbox). John Uebersax > ... . A group in which half the subjects like their salsa very hot > and the other half like it very mild is *not* the same as a group in which > all the subjects like moderately spicy salsa. A group of 50 partisan >

Re: likert scale items - why not PCA?

tiple psychological traits, these are often correlated--so one often wishes to relax the requirement of orthogonality. John Uebersax "Magenta" <[EMAIL PROTECTED]> wrote in message news:<LIN77.634$[EMAIL PROTECTED]>... > Why a factor analysis and not a principal components

Re: likert scale items

North Carolina, are you? John Uebersax Teen Assessment Project <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED]>... > I am using a measure with likert scale items. Original psychometrics > for the measure > included factor analysis to reduce the 100 variables to

Re: Alscal vs. NCSS

As the other reply suggested, perhaps there is a problem with local maxima. Or maybe, since these are different programs, the commands in one case were incorrect. Why not run a metric MDS for comparison purposes? That might help you decide whether the Alscal or NCSS results are suspect. John

Re: How calculate 95%=1.96 stdv

or the error and thank Jon for pointing it out. John Uebersax John Uebersax wrote: > > +infinity [<-- should be z, not +infinity] >p = PHI(z) = INTEGRAL phi(z) >-infinity > > where: > z = standard normal deviate > PH

Re: goodness of fit for mixture of multinomials

. Discrete multivariate analysis: theory and practice. Cambridge, Massachusetts: MIT Press, 1975 or any text on loglinear modeling, or one of Alan Agresti's books on categorical data analysis. -- John Uebersax http://ourwor

Re: Raschmodelling

. John Uebersax [EMAIL PROTECTED] P.S. I use MIRA and WinMIRA. In article <000e01c07f9e$fe326610$[EMAIL PROTECTED]>, [EMAIL PROTECTED] (=?iso-8859-1?Q?Mag._Stefan_H=F6fer?=) wrote: > I`d like to obtain information about computersoftware (free, trail or > commercial) to calculate

Re: OT: psychological test for recruitment in Statistics

atric diagnosis might legitimately be considered a medical disability. IMHO, psychological tests in this case should not substitute for a thorough interview and human judgment. Just my .02 worth. -- John Uebersax In article <9211so$9kt$[EMAIL PROTECTED]>, T.S. Lim <[EMAIL PROTECTED

Re: EdStat: Factoring tetrachoric matrix in SAS

ement, 1991, 15, 35-46. Note that conditioning the matrix in this way is a completely "ad hoc" procedure. Hope this helps. -- John Uebersax [EMAIL PROTECTED] Sent via Deja.com http://www.deja.com/ Before you buy. =

Re: Statistical Methods in Psychology Journals

Yes, but garbage in, garbage out. :) -- John Uebersax [EMAIL PROTECTED] === This list is open to everyone. Occasionally, less thoughtful people send inappropriate messages. Please DO NOT COMPLAIN TO THE POSTMASTER about

Re: Multidimensional Models IRT

Based on more research, here are some updates and corrections to my reply of yesterday -- John Uebersax MULTIDIMENSIONAL LATENT TRAIT AND ITEM RESPONSE THEORY (IRT) MODELS As mentioned in yesterday's post, this does not include information on logistic-ogive and Rasch-type multidimens

Re: Multidimensional Models IRT

CT, and the McDonald program), I believe that two may be different versions of the same thing. This should be plenty to get you started! -- John Uebersax [EMAIL PROTECTED] (reply to this address, not compuserve) === This

Re: Weighted Kappa

aters simultaneously. That is done with Fleiss' kappa (as opposed to Cohen's kappa, which only applies for pairwise comparisons). For a discussion of the difference between these two types of kappa, see Joseph Fleiss, Statistical Methods for Rates and Proportions, 1981. -- John Uebersax [

Re: Correlation - Constraints on Variables

d with X and Y are normally distributed (and jointly distributed as bivariate normal). However, the biserial/polyserial correlation allows that one of the variables has been "discretized." You might want to consider this option. For more information, you could check Kendall & Stuart, "The Advanced Theory of Statistics." Hope this helps. John Uebersax [EMAIL PROTECTED]