factor analysis

  1. B

    Visualize and quantify factors that most contribute to customer decision

    To the Direct Marketing department I have to to visualize and quantify the factors that most contribute to a customer’s decision to buy any group of product and any specific product. (Eg. Living in Scotland contributes with 18% to the conference attendance. I have a range of data that I know...
  2. P

    Test-retest sample size, factor analysis and cluster analysis

    Hello, I am developing psychometric questionnaire to assess project manager competencies in the region (which they actualy have - not state they do). I`ve backed up my questions with some previous research - there is about 140 competencies grouped in 8 "blocks" (individuality excluded). I`ve...
  3. N

    Factor analysis or just stick with compare means?

    I would be grateful if somebody could assist me on the below questions I have in doing my dissertation (I am relatively new to SPSS and indeed to statistics). I have a small set of cases (N=41) of companies who took my qnaire. There are 2 5-point Likert scale sets of questions: - one set is...
  4. P

    Two CFA vs second-order CFA

    Hi All, I'm working on my dissertation, and am evaluating the internal structure of a 34-item scale. The model in which the scale is based off of is hierarchical, and is structured/ordered as such: (1st) items, (2nd) item-groups, & (3rd) sub-scales. To evaluate this information I would use a...
  5. B

    Confused with SEM and factor analysis

    Hello, I am confused about what to do with the data set http://www.4shared.com/file/pz9nnOLQ/all_hospitals.html. This data set has 29 variables, of which we have to discard the variables ID, FTEequivalent and Size as they are unnecessary. From the remaining ones, we have four dependent...
  6. R

    Factor & Discriminant Analysis

    From a large data set, I've created several groupings of individuals based on factor analysis. In the future, if I want to predict which group an individual fits into based on the same questions, should I use the factor loadings I have, or do a discriminant analysis (or logistic regression - the...
  7. B

    Factor analysis with categorical variables containing missing values

    Hello, I am trying to make a factor analysis with 32 categorical variables. They can be ordered and found from a questionnaire that answer options. Different questions had different options. The options were coded as 1,2,3,4,5 etc. So, each number representing a category for a question is...
  8. T

    Longitudinal CFA / ESEM for factor extraction in ordinal data

    Our data has N=700 and 5 measurement points. We want to explore the factor structure of the questionnaire measuring the dependent variable. The questionnaire has 9 ordinal items (0-3), and both 1 and 2 factor solutions have been reported. I am using MPLUS because it can account for...
  9. L

    PCA shows more factors than it is expected

    Hi! A theory says that some psychological personality test (not NEO FFI) should give me six factors, but after I use PCA I get eight factors. So... what if PCA shows more factors than it is expected? Is it legitimate to say that the respondents were too tired or they didn't focus? (a...
  10. W

    Is nessasary to perform Factor Analysis for Marketing Research?

    Hello, I'm a student which conducting a marketing research. Topic of research related to determinant of E-Service Quality of a company. Questionnaire construct based on ESERVQUAL. So, is nessasary to run Factor Analysis? Or just replace with Mean and SD.
  11. C

    Linear Regression: how to tell if factors "disagree"?

    I use a regression as my predictor. Let's say my regression is (y=a1 x1 + a2 x2 + a3 x3) y=a_1 x_1+a_2 x_2+a_3 x_3 I realized that in practise, when my prediction is way off, it's usually because one factor significantly skewed the prediction. For example, x1,x2 are both slightly negative...
  12. W

    Factor Analysis-Why Rotation Failed?

    Hello, I try to perform factor analysis using SPSS, varimax. But the Rotation failed and come up this message: "Rotation failed to converge in 25 iterations. (Convergence = .022)." Q1. Why this happened? After that I added this into Sytax: "/CRITERIA ITERATE(25) RCONVERGE (0.022)"...
  13. A

    Issues with SPSS and factor analysis: Undefined variable name

    Hi, I used 2 different scales (DASS-21 and a version of the Five Factor Model questionnaire - 120 items) in my data set. I want to reduce the items in each scale to the different factors (that is, I already know what these items measure but I want to do a confirmatory factor analysis)...
  14. L

    factor analysis

    HI, I conducted interviews with 30 people on their perceptions towards Device X. Based on previous literature, the perceptions woud be categorised under 3 factors: Factor A, factor B and Factor C. I've transcribed all the interviews data and roughly I found some additional factors, namely...
  15. LyeTweek

    Bimodality of a factor

    Hi people, I am planning a project looking at socially desirable response types and have a sneaking suspicion, based on previous work, that I am going to get items loading onto the same factor both negatively and positively. I may have to justify this as not being a statistical artifact of...
  16. Chris210

    HELP!!!! Factor Analysis help needed ASAP

    Ok, here is the problem. I generated a Likert scale survey to test perceptions of quality, authority and usability on a website. No problems there. Each of the items above is constructed from 5 dependable variables, so I intend to use MANOVA for each one, again no problem. Right.. Each of...
  17. A

    Factor analysis question

    I am working on a project where I need to write Business Requirements for how to take a raw data file, run factor analysis against it and then output the results (Factor loadings, etc.) In short, I am looking for the code or an API of sorts. Anyone know a good resource to look at. I am...
  18. K

    Factor analysis for non-statisticians..

    Can someone tell me (in simple words please, I don’t know much beyond the basics of statistics) if I have understood this properly please? I’m reading a paper in which the concentrations of 30 elements in water samples were determined . R mode analysis was carried out and a table of five...
  19. C

    log transformation of binary variables

    Hi everyone, I am trying to do a factor analysis of a group of drinking behavior variables, and some of them are highly positively skewed. I want to do a log transformation of these variables, but they are binary. I can't find anything that deals with whether this is a problem or not - but...
  20. L

    Factor analysis - how to create a composite scale?

    Hi, I am doing a secondary analysis of the British Election study and am testing attitudinal variables (Likert scale) for their suitability in creating an attitudinal scale. I have selected 15 variables which I am testing for suitability for an Internationalism scale. Having run a “maximum...