The factor score coefficients apply to the standardized (z-scores) values of

the variables, i.e. the original values minus the mean, divided by the

standard deviation.

Hector

-----Mensaje original-----

De: SPSSX(r) Discussion [mailto:

[hidden email]] En nombre de Ivana

Sinkovic

Enviado el: Friday, July 28, 2006 12:21 PM

Para:

[hidden email]
Asunto: Regression equation

Dear all,

I was conducting factor analysis (principal components) and I was

wondering what is the equation for calculating factor scores for each

subject. I saved them as regression, but the results that I get by hand,

(using y=b1x1*b2x2*b3x3... equation, where b is factor coefficient and x

observed value on a variable, which I believed that was the right one) and

the ones that SPSS calculates do not match. Is the equation correct?

Then I have realized that I have zeros as values on all variables included

in factor analysis, but factor scores are different from zero (when they

should not be if the equation was correct).

It then crossed my mind that I might be needing a constant in my equation,

but I have no idea how to calculate it?

So, if there is anyone who knows what is the equation for calculating

factor scores, I would be very greatful to him/her if they would share that

with me.

Thanks in advance

Best regards to all,

Ivana

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