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

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2answers
126 views

should i take this variable which consist only 1 question in factor analysis? (all other variables are based on multiple questions)

I'm conducting a study on internet shopping adoption. I'm using a structural model from a research paper. My supervisor has asked me to conduct a factor analysis using SPSS. I'm quite weak in stats ...
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1answer
194 views

ANCOVA: ordinal covariate on SPSS

I'm trying to run an ANCOVA on SPSS with 3 variables: Gender, score 1, score 2. I want to control for the possibility that gender has an effect the scores, in order to isolate just the relationship ...
2
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1answer
94 views

Can I use the chi-squared test of independence with skewed data?

I have two variables, both categorical, one with skewed responses. How do you deal with skewed data in the chi-squared test? Are there any other relevant tests? I want to perform the test in SPSS.
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0answers
16 views

Comparing groups using SPSS

I have a dataset with 2 measures that were tested over 30 time points. I have a two groups of people who have both measures at all 30 time points. How do I compare the groups using SPSS?
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1answer
155 views

Bootstrapped t test in SPSS: Why are some p value cells blank?

Using an independent samples t test, I am comparing the performance of 2 groups on an activity, based on the percentage of items correct (the percentage of total items correct, as well as percentage ...
-2
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1answer
114 views

ISPSS: Cross-sectional time series analysis

I am trying to run a multiple regression in SPSS. I am using panel data with 4 independent variables. Of these, one is a dummy variable. Can someone please guide me through the process or give me ...
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1answer
25 views

How to paste SPSS output using the LIST command into SPSS - the output all pastes into one cell [closed]

If I use select if and then list some variables, the output appears as a plain text table in the output viewer. When I paste this into Excel it all goes into one cell. I've tried the copy special ...
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1answer
185 views

How do I “nest” data in a mixed-effects model? and MANY related questions about mixed effects models!

I treated 80 people with drug X and 80 with drug Y. I presented the drugs to them in groups of 10 (meow groups). The drug was consumed for 15 weeks. They reported the severity of their headaches (from ...
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1answer
43 views

45th and 55th percentile

I have a series of data from a household budget survey and want to do the following in SPSS: Identify the food expenditure shares of total household expenditure that are at the 45th and 55th ...
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1answer
92 views

How do I convert unstandardized RMR estimates into standardized RMR estimates?

I am having difficulty turning unstandardized RMR estimates from AMOS software output in a SEM into standardized estimates to enable suitable interpretation. Can someone give me advice on where to ...
4
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1answer
292 views

Using Univariate ANOVA with non-normally distributed data

If my data are non-normally distributed and I'm conducting a 2x2 ANOVA, what can I do to correct for this problem so I can report the main effect and interaction output appropriately? Only one ...
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0answers
103 views

repeated measures ANOVA with covariate

I conducted a repeated measures ANOVA and added a continuous covariate. Now there is a significant main effect of that continuous covariate. If I report that main effect I need to say something about ...
4
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1answer
166 views

Statistical significance for comparison of linear regression models

I have two linear regression models (with the same predictors) that try to estimate two different (although related) features of the same population. I am analyzing the hypothesis that these ...
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0answers
89 views

Fisher's Exact: why no test statistic for 2x2 tables in SPSS

Whenever I have used the Fisher's Exact test on tables larger than 2x2 contingency tables, SPSS has produced a test statistic that I can quote in my work. However, when I do the same with 2x2 tables, ...
4
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1answer
106 views

How to compare pre- and post-tests when subject identifier is missing?

My colleague and I are professors and we conducted an experiment in which we would please like some advice on deciding which tests to use in SPSS. He taught 4 classes of students on 2 different ...
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0answers
44 views

Linear Mixed Models with variable time points in SPSS

I am analyzing a clinical study measuring patients' symptoms and brain structure sizes over three time points. The "visits" should be at baseline, 3 months and 12 months but they vary considerably and ...
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1answer
95 views

Statistically prove the effectiveness of a treatment using GLM repeated measurements

I have two lots of samples: one is the control lot and the other undergoes some treatment. I did three measurements for the samples: one at the initial time (T1) ...
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1answer
157 views

Constant forecasts in SPSS

I have weekly data for the last four years. I am using SPSS to do forecasting. I am getting a constant value in the forecast period. What could be the reason behind it? Is it due to defining weekly ...
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1answer
208 views

Can i do a paired t-test on a pre- and post questionnaire but without pairing the same student for the pre and post?

I really suck at this so hope you could help me ve a group of people attending a training course, in order to measure whether the training course is effective in improving attendees' knowledge. We ...
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1answer
362 views

How to combine several categorical variables into one quality of health measure?

I am new to SPSS, and am trying to use SPSS to generate a variable on the quality of health service available to the residents of an area. Below are the categorical variables that could tell me the ...
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1answer
106 views

Save R MICE Imputed Data as SPSS data

I am calling the R MICE routines into SPSS to do multiple imputations. My question is how to save the multiple imputed data sets as SPSS files for later analyses. Any help would be greatly ...
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0answers
143 views

Which graphs are best suited to visualize multiple pre- and post-test scores between multiple groups?

I have a relatively small sample ($N = 64$) with the following variables: ScoreA_I: continuous pre-test response variable ...
1
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1answer
101 views

Confidence interval does not include 0, but Wilcoxon test is sgnificant

I've created an error plot with CI 95% to visualize the difference (post test - pre test) between achieved scores. n = 64 Judging from the confidence intervals one could conclude that there's is ...
1
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1answer
36 views

Does power of a test depend on number of cases or number of observations?

Cases and observations. It is my understanding that sample size is determined by the number of individuals taking part in an experiment (from my undergrad Psychology stats course). For each ...
2
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0answers
86 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 ...
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0answers
64 views

random effect in mixed linear model SPSS

I am using a mixed linear model to analyze the effect of two types of treatment on symptoms. The two treatments were administered in smaller groups (clusters), and delivered by several doctors, so I ...
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0answers
26 views

How can I statistically compare two time-series? [duplicate]

I have two time-series. Data have been logged over time for two different objects. Is there a significance test, applicable in SPSS or Minitab, that can be used to determine whether there is a ...
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3answers
360 views

Correlation and group difference with unequal sample sizes

My sample is 60 participants. At first, I did not expect to analyze the correlation, but the result is interesting, so I would like to. The 60 participants are 50 people who have good reading skill ...
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0answers
18 views

Should I include multiple mediating variables in the same analysis?

If the answer is "it depends", what does it depend on? I have three mediating variables, one predictor variable and one outcome variable. I have observed that the results I get when I run three ...
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0answers
125 views

SPSS: How to decompose interactions in repeated measures ANCOVA?

I conducted a study with three categorical within-factors and one continuous personality variable: topic (1,2) x gain loss framing (1,2) x achievement security framing (1,2) x personality I know how ...
2
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0answers
79 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,......
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0answers
72 views

Discontinuity Regression

I'm writing a political economy Master's thesis regarding the effects of the Euro Crisis on the rise of separatism in Spain (Catalan independence for example). The idea is to show that the Crisis has ...
1
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1answer
106 views

Sample-adjusted meta-analytic deviancy macro/syntax for Excel, SPSS, MPLUS

I need to compute the sample-adjusted meta-analytic deviancy (SAMD) as part of an outlier search with meta-analytic data. Because we have a very large amount of meta-analytic data, computing this ...
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0answers
82 views

Correlation between a categorical predictor and a continuous outcome variable

How do I perform correlation between a categorical antecedent variable and a continuous outcome variable? Like for example, correlating EACH attachment style with another variable, i.e, social ...
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0answers
15 views

isn't it possible giving weight to attributes in Clementine?

I use SPSS Clementine. I need to give a weight to one of my features to be considered much more than others as it is more important. I can't find any option to do this for training a C5 tree. the ...
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1answer
74 views

R plugin for SPSS [closed]

Can anyone tell me how can I integrate the R plugin for SPSS version 17?? I need to do some statistics using the R plugin for SPSS, unfortunately I can't find the plugin on the internet, so can anyone ...
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0answers
64 views

I'm stuck: How to 'bin' multiple binary outcome variables and then analyze within subject?

I have what feels like it should be a very easy analysis to work out, but I've been trying for hours and I can't figure it out. I'm using SPSS by the way. I have 10 (5 of each group) different binary ...
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1answer
69 views

Tree analysis - CHAID

I am running a decision tree analysis, and the same predictor that forms the first core branch, reappears as an another branch further down the tree. Could somebody explain me how this is possible? ...
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0answers
69 views

Relative Variable Importance in Clustering

In SPSS, the user can check the relative variable importance in a clustering result and produce a graph like the following: link: ...
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0answers
29 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 ...
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0answers
17 views

Is my data normal? [duplicate]

Ive tested my data for normality in SPSS, and i have two sig. numbers from the Kolmogorov-Smirnov and Shaprio-Wilk. In the Kolmogorov-Smirnov test i have the data: 0.014, 0.013, 0.200 and 0.200 In ...
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1answer
199 views

How can I compare regression coefficients in the same multiple regression model

I think this question has been answered in bits and pieces here and there, but I am still a bit unsure about what the best approach for this is: how to compare two coefficients from a multiple linear ...
0
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1answer
212 views

5 Likert Scale and Normal Distribution prior to parametric testing

I have data from a 5 point Likert scale item which approximately 1/4 of the responses only account for 1 through 4 of the 1 through 5 available. Do I have to standardize the min/max response ...
1
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0answers
593 views

What do the tests of model effects and parameter estimates really tell (when an interaction is defined)?

A couple of times in LMM or GEE (with SPSS, though I doubt that matters – and might occur in other analyses as well, but these are the ones with which I have seen it) I have seen something that seems ...
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0answers
55 views

How to analyse the relationship between many categorical variables

I have a number of categorical variables, each with varying numbers of levels: gender of client (m,f) age group (0-8, etc.) diagnosis (mild, moderate, severe, profound) location (community, ...
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0answers
27 views

Need help with proper syntax for SPSS Mixed [closed]

I am having trouble building my model properly, and I was hoping I could get some advice here. I have a 2 (S: P vs. D) x 3 (ET: CA vs. CO vs. AD) between-subjects design. Participants were run in ...
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0answers
93 views

Questionnaire analysis and grouping responses

I want to know if the creative process engagement (CPE) is related to creativity. I don't know how to analyze the questionnaire. I will be collecting data for CPE with Zhang and Bartal's (2010) ...
1
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0answers
328 views

is it possible to use partitioned data(train&test) together with cross-fold validation?

I have used SPSS Clementine in order to train a classifier, for this I have used a partition node with 2 parts(train and test),then using a c5-tree and cross-fold validation. I did this because I ...
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0answers
132 views

Testing “weak” instruments - F test

I would like to address the endogeneity problem in my model. Let me go step by step. I have panel data for 19 countries, 1995-2010. My regression model: ...
0
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1answer
76 views

Best way to estimate a regression with reaction times

I have reactions times in a no-normal distribution, so I am using logarithms. Which can be the best way to estimate a regression? Later, I would like to plot the results according to the age of my ...