SPSS (Statistical Package for the Social Sciences) is a proprietary cross-platform general-purpose statistical software package.

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Obtaining the Standard Error of Weighted Data in SPSS

I'm trying to find confidence intervals for the means of various variables in a database using SPSS, and I've run into a spot of trouble. The data is weighted, because each of the people who was ...
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1answer
156 views

Interaction/Moderation effect in ANOVA - variable is not one of the factors

I am running an univariate ANOVA in SPSS to test my hypotheses for my 3x2 between subjects design experiment. The factors for the ANOVA are review valence (3 levels) and presence of brand (2 levels). ...
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1answer
24 views

SPSS: Determining the direction

Background: Group A the control group uses a website 1. Group B the treatment group uses website B. The expected result is that Group B will have a higher understanding than group A. Hypothesis: The ...
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11 views

Is use of reliability analysis always necessary in data handling?

My study involves studying the seasonal variations (premonsoon, monsoon, postmonsoon) in river at 5 different sampling points. The water quality study involved eight water parameters. To check the ...
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1answer
63 views

Convert an interval variable to ordinal in SPSS

I am currently conducting a study on reverse mortgages for my master thesis, and I'd like to convert one interval variable into ordinal in order to run a ordinal probit regression analysis. My ...
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2answers
83 views

Segmentation using cluster analysis in SPSS

I am doing a segmentation project and am struggling with cluster analysis in spss right now. Could you please help me get this answered: How do I determine the quality of the clustering in spss? In ...
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46 views

Interpret the pairwise comparison plot from SPSS

For my user study, I am trying to find out to what extent people prefer to move by foot. They had the option to rank their preference for 'walking', 'jogging' and 'running' for a several amount of ...
2
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1answer
38 views

SPSS CHAID/CRT Query

Hello I am using SPSS trees - CART functionality for classification. I have a number of classifying variables such as Business_Size, Location, Previous_Record etc. I want to know how do I set ...
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88 views

Contingency tables, Chi-Squared analysis and next steps in R

I'm hoping one of the more experienced R programmers/statisticians out there can help me with something, or explain why what I'm trying to do is stupid :-) In the past, I've done analysis of survey ...
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30 views

How to create item parcels for a factor that is not unidimensional?

This is follow-up question by "How to create item parcels in SPSS Amos?" My question is how to create item parcels for a factor that is not a unidimensional. Several articles have mentioned that ...
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30 views

SPSS Date Correlation

I have 2 sets of data: one is a list of all days in 2012 in date format (DatesA); the other is a list of dates in 2012 on which certain events occurred (...
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1answer
37 views

2x2 ANOVA interactions

I'm doing a masters project where I look for effects of font (fluent, disfluent) on two populations' (control, dyslexic) reading comprehension. SPSS only gives me a significant main effect for ...
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47 views

Repeated Measures ANOVA pairing counterbalance issue

I have been conducting all of my analyses on one DV (Quality) using a repeated measures ANOVA, with two variable (Time and Gender) at two levels each. However, it occurred to me today, that this might ...
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32 views

Syntax for means and standard deviation on repeated measures GLM in spss?

This may be a silly question, but when running a repeated measure GLM in SPSS, and entering syntax for means tables (/EMMEANS), is there any way to get that table to show not just the standard error, ...
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70 views

graphing interactions' SD above and below the mean

I am fairly new in using SPSS (I'm a freshman in a university) and would like to further test my interactions. I read the Aiken and West procedure for testing interactions, one that graphs the ...
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1answer
29 views

Contradictive results of correlation and intergroup comparisons

I got strange results in spss and I don't know how to explain them statistically. I made correlations between: 1) personality and emotional inteligence (EI) 2) personality and emotional competence ...
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1answer
88 views

Dummy variables in linear regression

I used SPSS to create dummy variables for three different shops. Shop 1 was coded 0, shop 2 was coded 1 and shop 3 was coded 2. In my output I see that the slope coefficients (B) for shop 2 and 3 are ...
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1answer
75 views

optimal scaling / CATREG for imputed data

I have a data set with 5 different kinds of nutrient statuses and I want to see whether they are associated with categorical / ordinal grades at school. I have multiple covariates which I will ...
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1answer
79 views

Can AMOS be used to perform logistic regressions?

I need to compare 11 groups of data, for the same relationship. My first thoughts were to create 11 regression equations (one for each), and to compare parameters between groups. Problem is that ...
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1answer
105 views

Plotting results with many features

I need an advice for plotting my results. I got different classification results by including different features and different k values. So, I got different results for each of them: My features: ...
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1answer
48 views

Need help for which test to choose?

I am studying on cognition and behaviors. I am lecturing linguistic courses and teaching linguistic terminology with visuals. In my research, just before each course, I asked participants 20 ...
3
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2answers
105 views

How to approach missing data…ignore or not to ignore?

What would be the best option when you come across missing data. Do you exclude that person completely from the data analysis or not. If not then how do you go about it? i have data on two groups at ...
2
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2answers
82 views

What test should I perform on a structural equation model?

This model is a replication of an earlier study. After factor analysis in SPSS, I need to test my hypothesis (as you can see there are 7) all should give significant positive relation with each ...
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1answer
31 views

Grouping cases on certain criterion

You experts have been helpful so many times that I read others' threads, but this time I have to ask a new question. Long story short I need to group all my cases into 4 categories. Could someone ...
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1answer
55 views

Should I analyze variables separately or together?

I have one categorical variable (on a diet: yes or no) and two numerical variables (patients heart rate and ...
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22 views

Two Groups Time 1 and Time 2 Nonparametric

I want to look a the effect of an intervention on work satisfaction and motivation. The data not normally distributed. I have two groups, intervention and control, with 11 in each group. I measure ...
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2answers
141 views

Confidence interval for the intercept in logistic regression

Some major commercial statistical packages (e.g., SPSS) do not report a CI for the intercept term in logistic regression. [Based on answer below R does provide CI for intercept] Why might confidence ...
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1answer
79 views

Finding groups of similar people

After asking 16 questions (yes or no) to 75 people I have a table of their answers coded like 00110011110101010 ('0'=no and '1'=yes). Now I would like to find ...
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2answers
72 views

Logistic regression with an independent variable that only applies to a subset

I'm trying to perform a logistic regression with the dependent variable being whether a potential customer who attended an event purchased or did not purchase. A subset of potential customers at the ...
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63 views

Factor analysis using spss

I got determinant value– 5.84E-007. What does it mean? Should I continue the work or not? What do I have to do? And also I obtain the following Kaiser-Meyer-Olkin value and Bartlett's Test results ...
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63 views

Running a Pearson's correlation calculation on binary survey data

I have the following raw survey data output from a survey app: I was asked to run a Pearson's R on the results (1s and 0s). The format that is returned is as follows: I was further ...
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1answer
52 views

Book on interpreting plots in regression analysis

I am taking a regression course that is mainly theoretical. But we are given scatter plots and residual plots, and we are supposed to be able to describe the relationships and interpret them. I find ...
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44 views

Repeated Measures ANOVA or mixed model? And with massive group differences?

I need some guidance on which statistical test to use: I want to know if the nature of frog calls changes depending on the time of day. I observed 4 species of frogs at the same 3 times for several ...
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0answers
51 views

What's a good Nagelkerke value?

My model has Nagelkerke $R^2 = 0.282$ as outputted by SPSS. Having read some literature, it claims that this should be counted as a good value. However, since the maximum value is 1, this means that ...
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41 views

Comparing the difference in change in repeated measures ordinal variables between two groups

I have two groups of patients, those with (OSA) and those without (nOSA) sleep apnoea. Patients were scheduled to undergo a surgical procedure (Sx). Each patient completed a type of quality of life ...
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2answers
55 views

.999 signifiance query

I am getting the following result for one of my variables after running a logistic regression. Basically I have a set of binary dependent and one independent variable. One of the dependent ...
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78 views

Calibration curve in spss

I couldn't find any tutorials on this on youtube or otherwise. I am validating a clinical prediction model and I have a set of predicted outcomes and the real outcome. I have built a ROC curve but I ...
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1answer
74 views

Tests of within subjects contrasts in R

I have run a split splot model in SPSS (via repeated measures function) and I would like to reproduce my results using R. To do so I used ezANOVA function from ez package to obtain sphericity tests ...
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3 views

Reliability estimate for each item (comparing raters to each other)

I am working with a 15 item scale of pre-school teaching. Five observers observed 58 teachers. Its a complete crossed matrix i.e, all raters observed all teachers. In an attempt to weed out the weak ...
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99 views

multiple chi-squared tests for pairwise comparisons

I have one between-subject factor with four levels, and one dichotomous dependent variable. I want to test if each pair within the between-subject factor is related differently with the dependent ...
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1answer
64 views

How to control for type-1-error inflation with multiple chi-squared tests?

I have two between-subject factors, each with two levels (so 4 conditions). Furthermore, I have one dependent variable (qualitative), also consisting of two levels. Now I want to make pairwise ...
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11 views

two measures at each ordinal variable category

I have an repeated measure (4 total measures) variable of severity, but two measures are high severity and two measures are low severity. I want to test the difference between high and low severity. ...
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1answer
34 views

Correct Stats to Run?

I am doing a study on body image perceptions and physical activity among adolescents. My hypothesis is adolescents who engage regularly in physical activity will have a more accurate perception of ...
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11 views

slowing down effect

I am looking for an algorithm or function to look at the difference in reaction times after negative feedback. The problem is that I need to consider just the times in which negative feedback came ...
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42 views

Correlation significance test with standardized z scores

I am using spss I am looking at a criterion-validity concurrent design. I had to transform two groups performance ratings into z scores because there were differences in how raters rated them on the ...
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30 views

Compairing 2 ideas - multiple dependent variables

I am trying to compare 2 ideas to see which one is better/more effective - I am looking to see if a significant difference. (2 conditions) We used a questionnaire to gather feedback from hundreds of ...
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2answers
73 views

factor analysis problem in structural equation model

I am using an Extended Technology Acceptance Model and have adopted an instrument from a research paper. After performing factor analysis in SPSS, most questions related to different constructs ...
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73 views

Ordinal Independent Variables and Dependent Variable Regression Analysis

I have 3 variables (2 are independent and 1 is dependent). All three variables are measured with questionnaires consisting of multiple questions recorded on 5 point scale. I want to perform regression ...
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67 views

Detecting outliers in non parametric data

what is the best (and easy) way to detect outliers in spss for skewed, not exactly normally distributed data? Thanks a lot
0
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1answer
72 views

SPSS outcome interpretation

I am very new with statistical programms, statistical analysis and SPSS. Now I even have to use the GEE function which seems to be a little too much for me. Do you ...