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

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6
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117 views

Balanced repeated measures design

Okay this is my problem: I have 12 participants. Each participant spent 3 nights in my lab doing a reaction time task at four timepoints during the night(12, 1, 2 and 3 oclock), with one week ...
4
votes
0answers
162 views

Interpretation of mixed model with repeated measures

I have performed the following experiment: Two genotype groups of two different ages were monitored in the presence of three drugs one after the other. So, each subject after a control period received ...
4
votes
0answers
788 views

How to assess mediation effect in multinomial logistic regression?

I wonder if it possible to include a mediation effect in multinomial logistic regression. I have a categorical (3 categories) outcome variable and four predictors (all continuous). I expect one of the ...
3
votes
0answers
36 views

SPSS: Pearson's r not significant but confidence intervals do not include 0

I have calculated the value of Pearson's r between two variables in SPSS, two tailed. Sample size is 81. The r value is -.02. The p value is .06. When I compute the 95% confidence intervals using ...
3
votes
0answers
30 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 ...
3
votes
0answers
154 views

Binomial logistic regression in SPSS using survey weights

I am running a logistic regression in SPSS with a sample that uses survey weights. The sample size is 1000 and the weights are along the lines of .86 or 1.23 depending on the case. I am using the ...
3
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0answers
148 views

Is it possible for my mixed model results to be the same as those for a repeated measures ANCOVA? Why don't I get the same results? SPSS

The experiment: Two groups of children perform tasks with three levels of difficulty at two different time points and brain activity is measured. All of the children perform all of the tasks and do so ...
3
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0answers
307 views

What does the Scale parameter mean in linear regression?

I have started to use the GENLIN procedure in SPSS more than any of the specific dialogues, but I don't understand the Scale parameter or why it has the effects it ...
3
votes
0answers
461 views

GEE (or GLMM) in SPSS: Interpreting outputs and model selection

I am attempting to analyze my (experimental psych) data in SPSS, and I have a few questions regarding the kind of analysis I should be using (GEE or GLMM), how I should be interpreting the output, and ...
3
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0answers
528 views

How do I estimate a repeated measures ANCOVA in R and SPSS?

I'm currently running a perception experiment: DV: error (this in degrees- how much an observer was away from the real answer) IV: the time bin (5 levels) in which the unique stimulus appeared ...
3
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0answers
78 views

Time series with 3 factors from different sources

I've been asked to try to do a preliminary 'meta-analysis' of some data, but while comfortable with maths I don't have much experience with stats. I'm hoping to get some feedback with what I have ...
2
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0answers
8 views

Methods for measuring snowball effects in a “complete” longitudinal dataset

I'm looking for ways to test for "cumulative advantage" effects in a longitudinal dataset (see image) I guess the data set is principally similar to this: http://www.caldercenter.org/whatis.cfm , ...
2
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0answers
20 views

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 ...
2
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0answers
70 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 ...
2
votes
0answers
35 views

How to test for mediation with a continuous mediator and DV, but a categorical predictor?

I want to explore whether attitudes mediate the relationship between employment status and intention to apply to graduate school. (See image below). I planned to use the Sobel Test to explore the ...
2
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0answers
61 views

How to code and analyze skiped questions with SPSS

sorry if my question may seem rather silly, but I'm not well up on statistics and need a piece of advice. I have some cases in my dataset where respondents have abandoned the survey half-way, so I ...
2
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0answers
57 views

Composite Scores and Standardized Composite Scores t test

I have a set of survey data related to 20 survey questions. Each of these questions represent a variable (Q1, Q2,......
2
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0answers
28 views

How to compare 37 dichotomous variables (lab tests) to 31 dichotomous variables (diagnosis)

I've constructed a database based on chart review of patients. Patients had a variety of tests performed (37 different types, which were either positive, negative, or not performed aka 1/0/blank - I ...
2
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0answers
81 views

Does it make sense to plot train and test results on a common ROC graph?

I am building a model using SPSS with 80% of my data. I can plot a ROC curve for both the training set and separately for the test set. I can´t find a way to plot both on the same graph. Since both ...
2
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0answers
43 views

Which model for data which has within-effects, between effects and non-parallel lines

My data (Panel, 19 countries, 7 years, ordinal outcome variable) has within-effects (countries over time), between effects (between countries) and it seems as if the slope of lines (test of parallel ...
2
votes
0answers
77 views

If I compare conditions within two preexisting groups is that a quasi-experimental design?

I have two groups of participants, one group of psychosis patients and one group of controls. All of the participants complete a computer task that has three different conditions. So, I want to make ...
2
votes
0answers
62 views

User-defined contrast on Generalized Estimating Equations

I am running a GEE on SPSS as well as Stata on choice data with the following structure: Each subject completed 32 trials in 4 ...
2
votes
0answers
99 views

Test regression parameter against a constant in SPSS

This is a pretty basic question, but I can't find an answer by searching for different statements of the same problem. Is there a straightforward way to test if a regression parameter is different ...
2
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0answers
84 views

mixed ancova or difference scores?

I am puzzled with how I should analyze the following data: The dependent variable is respiratory sinus arrhythmia, a measure of parasympathetic activity (RSA). I have a $5\times5$ full factorial ...
2
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0answers
57 views

What type of Design is this?

Participants are asked to recall either a happy or sad event in their life. Once a mood of happiness of sadness has been elicited all participants are then presented with 3 stories where the central ...
2
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0answers
60 views

ANOVA variable that is both BETWEEN & WITHIN

Does anyone know how / if can you treat an independent variable as BOTH a between AND within subjects variable (ideally in SPSS ANOVA-repeated measures). That is, we have a repeated measures study ...
2
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0answers
384 views

How to cluster standard errors (by country) using SPSS?

I'm trying to obtain robust standard errors as my regression residuals seem to be correlated... My sample data has 8 countries and I would like to cluster the standard errors by these 8 countries ...
2
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0answers
235 views

Mean Survival Time Cox Regression

I am new at using survival analyses. I am writing an article on differences in recidivism for an experimental and control group of offenders. Due to differences between the groups in gender, I have ...
2
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0answers
875 views

R vs. SPSS Kolmogorov-Smirnov test

I was recently given the following data. 7 1 6 6 2 8 3 7 4 6 3 3 1 8 4 5 9 3 2 4 1 4 4 3 6 3 4 2 3 2 7 2 7 4 2 4 4 4 3 2 2 4 5 8 6 4 3 1 5 5 I then ran a KS test ...
2
votes
0answers
450 views

Split-split-split plot cross-over design… is this even possible?

I'm doing statistical analysis on a psychology study I ran a short while ago, and I'm starting to think that I've designed myself into a corner. In the study, we measured participants' pointing ...
2
votes
0answers
669 views

Differences between Stata & SPSS in multiple regression outcomes

I'm a graduate student working on a thesis whose aim is to test complementarity between 2 practices (CI and INNO, according to theory of supermodularity). To do so, I calculated two new variables ...
2
votes
0answers
390 views

Controlling for a variable in a GEE using SPSS

I have a dataset which I think would suit GEE. I am trying to assess the relative contribution of a number of simultaneous predictors and their interactions to the intensity of hurt feelings. I asked ...
2
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0answers
127 views

How to do post-hoc contrasts on within factor depending on certain between groups in SPSS?

Here are my experimental factors: within-factor (two levels): time1, time2. between factor (four levels): 4 groups. I want to test specific post-hoc contrasts comparing: group1: time1 vs. time2 ...
2
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0answers
2k views

Does anyone have experience with IBM's “SPSS Modeler”?

SPSS Modeler seems like a great tool for data mining (especially for prediction etc.) but it is extremely costly for individuals like me (around 20,000 euros excl. tax). There is also a video. I am ...
2
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0answers
270 views

How to test for differences from baseline where dependent variable is non-normally distributed using SPSS?

I have some physiological measurements which consist of 4 events measured in a "during task" condition and preceded and followed by a rest period. I want to test that the data points immediately ...
2
votes
0answers
297 views

Multiple imputation using SPSS

I am working with a database with missing data. I have done "Roderick J. A. Little’s chi-square statistic" and knew that my data are not MCAR. However, I know don't have can I determine if there are ...
2
votes
0answers
809 views

How to perform Fisher exact test in SPSS?

I've collected around 10 numbers of ants from a colony and introduced the same numbers of ants to the same colony (say Colony-1) at their entrance to see their behaviour (whether they accepts or ...
2
votes
0answers
575 views

Multiple response question with duplicated answers

I have a multiple response (categories) question (Q11, ..., Q15). My problem is that the data-entry clerck repeats the answers in the same case. Example: ...
2
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0answers
375 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 ...
2
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0answers
553 views

Problem with casewise list in logistic regression

I am using binary logistic regression to test this model: logit(ρ1) = α + β1(INDDIR) + β2(INDCHAIR) + β3(BOARDSIZE) + β4(DIRSHIP) + β5(MEETING) + β6(EXPERT) + β7(INSTI) + β8(DEBT) + β9(LnSIZE) + ...
1
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0answers
25 views

Understanding repeated covariance types in SPSS?

I am working in SPSS on a repeated measures linear mixed model and I am having a really hard time wrapping my head around how to select a "repeated covariance type". The options are: ...
1
vote
0answers
39 views

Questions about G*Power

Since I found an insignificant result, I performed a power calculation in G*Power. But I am not entirely sure if I input the right number in some fields. My design is a 2(between Ss) x 2(between Ss) ...
1
vote
0answers
9 views

SPSS GENLINMIXED for crossed groups

thank you for any help you might offer. I have data in which the groupings are crossed, not nested. Each player responds to the same set of items. In MIXED, I give a separate intercept to each ...
1
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0answers
7 views

Best Multiple Imputation Method for Multiple Surveys Mixed Together, Presented Randomly?

I am working with a dataset containing data from 15 different surveys. The surveys were presented all as one battery to participants, with questions from all surveys essentially placed into a pool and ...
1
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0answers
39 views

How to: repeated measures anova and Friedman's test with multiple imputations for missing data

I have a study where patients were measured pre-operatively (time_pre), post-operatively (time_post) and long-term follow-up (time_lt). I have 60 subjects. Data consists of: 5 scale variables ...
1
vote
0answers
24 views

Repeated measures ANOVA with missing data

I have a DB with multiple missing values (scale, ordinal and nominal). I used multiple imputation to fill in these missing values. How can I perform a repeated measures ANOVA on these (5) datasets? ...
1
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0answers
51 views

Leave one out cross validation for rare events logistic regression in SPSS

I am writing thesis about predicting which corporate takeover targets attract a competing bidder. I first estimated a model using a logistic regression. The sample consists of 1350 single-bidder ...
1
vote
0answers
19 views

Assessing Cannibalization, intervention of new mobile app on monthly sales

I am a beginner in statistics and looking for suggestions from you all on the approach for one of my study. For my study, there is a company which sells products via its online website (lets call it ...
1
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0answers
24 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 ...
1
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0answers
41 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 ...