factor analysis

  1. Reductionist

    pre-publication testing of one-click auto-analysis tool

    Hi all, I’m a psychometrician at Penn (https://scholar.google.com/citations?user=TlO7ZTsAAAAJ&hl=en) and wanted to get your feedback (as students, faculty, or private sector folks) on a new tool I’m developing for one-click automatic data analysis: https://mooremetrics.com/deedive All you have...
  2. A

    Can you use factor analysis on a table has count data?

    I am working on a project where my predecesor has been analyzing a table of rows by columns of count data. Brands represent the columns, and statements about those brands represent the rows. The cells contain count data where people who have consumed one of 10 brands have endorsed one of 10...
  3. F

    Factor Analysis newbie seeks your help

    Hi, Perhaps unwisely as a newcomer to stats, I have taken on a scale validation project. I’ve searched the literature and can’t find anything so this is the issue: I’m developing a scale that (hypothetically) will identify, differentiate and measure two different constructs occurring in...
  4. C

    Prior knowledge of Confirmatory Factor Analysis required for Principal Component Analysis (PCA)?

    Can someone please tell me the prerequisites to learn PCA? Is prior knowledge of CFA needed? I am new to the topic. Thanks in advance!
  5. M

    Factor Analysis (categorical variables)

    Hi everyone, I need to run a factor analysis on a few nominal variables. They have no defined order, therefore, I cannot use polychoric correlations to create a matrix. My variables are coded such that: 1- respondent 2- husband 3- In laws and so on. I have eight variables and will...
  6. S

    Can i use the results from a PCA if the matrix is 'not positive definite'

    Hi, I have a 'not positive definite' correlation matrix having done a principal component analysis (PCA) on SPSS. The data i have used is from a questionnaire i did using a 7 point likert type scale. There were 36 questions (36 variables) i got 16 responses (n=16). The questionnaire was very...
  7. W

    How to assign new data to an existing clustering

    This is the situation. First, I performed factor analysis on 20 continuous variables, and reduced those to 10 factors using SPSS. Then, I did k-means cluster analysis and through trial & error came up with a 6 cluster solution. What I now need to accomplish is being able to predict which of...
  8. F

    Does it make sense to conduct a Hierarchical Principal Compomnent Analysis (PCA)?

    So I have twelve variables that theoretically belong to the same dimension and I want do reduce them to one single item. A hierarchical factor analysis gives really low loadings at the second level. However, if I do PCA at both levels I get good results, but does it make sense to do a...
  9. P

    Help with Exploratory factor analysis

    Hello, I am running exploratory factor analysis (EFA) to explore the existence of possible structures within my sample and I have managed to extract 6 factors. Would it be correct to state that since by means of EFA I have managed to see structure within my sample, I hypothesize that...
  10. B

    Help understanding separate- and joint- factor analyses in CFA and ESEM

    Folks, I am reading an article that tested 2 models--one with an hypothesized separate-factor relationship between five pairs of personality dimensions as measured by two personality assessments, the other with a hypothesized joint-factor relationship between the dimensions--using CFA and...
  11. C

    Interpreting negative correlations between factors?

    Hello evetyone! I conducted factor analysis on a 30-item scale which is suppose to be measuring xenophobia. All the variables were previously recoded in order to express the same side of the measured dimension. (I am using SPSS) I intend to analyse the relationship between xenophobia and a...
  12. A

    Seek for Statistical Test of Variability Contribution Percentage of Multiple Factors

    Hi, I need statistical test which would tell me which percent of variability in dependent variable is from given independent set of variables and which of unknown ones. Example: Model: Y = Model (X1, X2, X3, ....) Measurements of Y, X1 and X2 are given. I need test which tells me the portion...
  13. Z

    How to Interpret the Factor Analysis Findings

    Kindly If someone can help interpreting results as attached please
  14. K

    Newbie stats help: How to safely interpret Total Variance Explained -Factor analysis

    Hi all, I have run a factor analysis to test reliability and validity of an established scale and found simple structure with my own sample, which is great. I found a difference between the factors that explain most of the variance in the established study and my study. Now I am discussing...
  15. I

    URGENT: Factor Analysis

    Hi All, I have a basic factor analysis question. Is there any way you can/should combine the factors you get from a factor analysis output. I realize the correlation between the factors is zero, but I just wanted to check if there is any such known method. Thanks!
  16. L

    PCA Analysis - Factor Analysis gave only 1 column?! Need to do a scatterplot!

    I am conducting a PCA on my dataset which has four scale variables (duration, %, rate 1, and rate 2) to see if they contribute to a single component. I conducted a factor analysis and it created only one column. When I have conducted PCA before, I have been given two columns by which I was able...
  17. S

    Factor analysis

    Dear members, I have 20 questions (Likert 5-point), ultimately I want one variable: "affect". So I ran a factoranalysis, which gives me 4 components (rotated Varimax). Do I have to choose one of those components as my variable "affect", or can I combine those 4 components into one variable...
  18. C

    What analysis do IQ tests use?

    I can't find anywhere what statistical analysis IQ tests (like Weschler scales, BAS, etc.) use. It is not stated in any of their material (that I can find at least). I've heard it mentioned that PCA and/or hierarchical factor analysis are used? I know historically some type of factor...
  19. F

    3 experiments and the same 3 scales as DV - run Factorial Analysis together or sep

    Hi! I realized three experiments (varying only the marketing context) and used as dependent variables the same three scales (attitude, purchase intention and experience). I carry out the exploratory factor analysis for each of the three experiments or perform only once for all experiments...
  20. B

    Problems with confirmatory factor analysis in R

    I am trying to teach myself confirmatory factor analysis by working through examples in a textbook. The textbook only contains syntax for LISREL or SAS but I'm trying to learn it with R. When I estimate models without any equality constraints or correlated errors, I get the exact same output as...