Tagged Questions

0
votes
0answers
23 views

Impact of some dimensions of one construct on the another construct in a 2-construct model

I have made a model consisting of two constructs, say parents and children, each with several dimensions and set of items (variables). I have used a mixture of Exploratory Factor Analysis (EFA) and ...
0
votes
3answers
405 views

“matrix is not positive definite” - even when highly correlated variables are removed

I am running a factor analysis in SPSS and get a "matrix is not positive definite" error from my correlation matrix. I've tried removing correlated variables, but I have to remove all variables down ...
4
votes
1answer
309 views

Best factor extraction methods, with reference to SPSS

SPSS offers several methods of factor extraction: Principal components (which isn't factor analysis at all) Unweighted least squares Generalized least squares Maximum Likelihood Principal Axis Alpha ...
1
vote
1answer
351 views

Can non normal data be used for factor analysis and multiple regression? If so what is the procedure to justify it?

While I was writing up the analysis in my thesis, I just came across when rechecking my test for normality, that the p-value for most continuous variables was .000, which is less than .05, and it ...
0
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0answers
104 views

Does SPSS give factor scores for mean subtracted variables?

From the Johnson's book, I can see the orthogonal factor model is as follows: $X-\mu=LF+\epsilon$ So if I use SPSS for extracting factor scores from a factor analysis of several variables, then am I ...
0
votes
1answer
157 views

Mean regression factor scores and attributes cross tabulation yields. Why are all expected signs reversed?

I ran a factor analysis on 20 reasons for purchasing 4 different Goods. These are ranked on a likert scale from 1-5 with 5 being the "extremely important case", 4 important case, etc. I extracted 4 ...
0
votes
1answer
1k views

How to interpret factor scores saved as Reg variables in SPSS?

How do I interpret the factor scores that I save as Regression variables with SPSS? I have 30 attribute variables with reponses such as extremely important, very important, important, not that ...
1
vote
1answer
128 views

Multinomial regression with categorical choice and predictos and factor analysis

I have a non-ordinal categorical dependent variable with 3 choice outcomes and 20 ordinal categorical predictors and want to do a multinomial logistic regression. However, I want to reduce the ...
4
votes
1answer
193 views

When is it acceptable to use only two items (variables) per factor in factor analysis?

I have a set of 20 variables that I have put through factor analysis in SPSS. For purposes of the research, I need to develop 6 factors. SPSS has shown that 8 variables (out of 20) have been loading ...
0
votes
0answers
85 views

Is it possible to use factor analysis on census data?

I have some census data of 20 urban regions. I want to use them to combine 5 criteria to determine which region is most deprived. Is it acceptable to use factor analysis?
3
votes
1answer
536 views

Categorical Principal Component Analysis - using Count, Continuous, Ordinal variables together

I have some variables and I want to reduce their number for further analysis. I initially thought of combining them using factor analysis. But since the variables are of all kinds (rating, count, ...
2
votes
2answers
111 views

Factor analysis or just stick with compare means?

I would be grateful if somebody could assist me with the questions below This is for my dissertation (I am relatively new to SPSS and indeed to statistics). I have a small set of cases (N=41) of ...
3
votes
1answer
171 views

How many factors to retain in EFA?

I have multiple measures from a scale and I want to determine the best factorial structure using EFA, in SPSS. I don't understand if I can retain the number of factors that I want to retain because ...
3
votes
1answer
3k views

How to calculate Mahalanobis distance in SPSS for an exploratory factor analysis?

I have a question regarding data screening for an exploratory factor analysis (EFA). I am conducting an EFA to identify the factor structure of 20 questions that I created on the topic of ...
3
votes
1answer
271 views

Should EFA be repeated after deletion of items with low factor loadings?

After running Exploratory Factor Analysis in spss v.17 I deleted 4 measurement items which yielded low factor loadings. Now I want to proceed to Confirmatory Factor Analysis to calculate AVE and CR. ...
3
votes
1answer
1k views

Factor analysis for ordinal variables that have different categories

I have a data set that contains about 40 categorical variables that are taken as independent variables (and believed to be related to some unobservable human resource factors) and 4 categorical ...
11
votes
2answers
1k views

Interpreting discrepancies between R and SPSS with exploratory factor analysis

I am a graduate student in computer science. I have been doing some exploratory factor analysis for a research project. My colleagues (who are leading the project) use SPSS, while I prefer to use R. ...
2
votes
1answer
869 views

Can I somehow compute variance explained by PC after Oblique rotation in PCA?

Let´s say that my PCA analysis extracted 2 components, which explain 80% of the variance before rotation. The components were then rotated using oblique (Direct Oblimin) rotation, so SPSS cannot ...
1
vote
1answer
227 views

Problem with Developing a Model for an Exploratory Study (PCA EFA)

*Background:* I am doing an academic study that is more exploratory in nature (my advisor did not want me to develop any hypothesis). So I read books and conducted interviews to try and gather a large ...
2
votes
2answers
654 views

Where can I find information about using SPSS for EFA and CFA? Is PCA (two samples) and reliability sufficient for scale development?

Context: I am in the process of developing a scale for my thesis. My advisor has guided me to using SPSS PCA to complete my analyses. Initially we reduced my scale to 3 factors (her insistence), ...
5
votes
3answers
2k views

How to calculate an overall job satisfaction score and test group differences?

I am doing a project on finding out whether there is a difference in job satisfaction between employees of non-profit organisations and for-profit organisations. I also need to find whether job ...
4
votes
1answer
2k views

Factor analysis problem — singular covariance matrix?

I'm having trouble performing factor analysis on my dataset. When I perform the factor analysis in SPSS (default settings), it works fine. Problem is, I need to do it programmatically (in Python). ...
1
vote
2answers
11k views

AVE & composite reliability with SPSS

I have some issues with an explorative factor analysis. Can anybody please tell me how to calculate the Average Variance Extracted (AVE) and the Composite Reliability from two factors, each with ...
2
votes
0answers
348 views

Factor analysis: regression equation and residuals

I have used factor analysis with regression method. I was trying to develop an index using this regression equation by using the output of the component score coefficient matrix (SPSS) generated for ...
7
votes
4answers
2k views

is psych::principal function still PCA when using rotation?

I have tried to reproduce some research (using PCA) from SPSS in R. In my experience, principal() function from package psych ...