IBM SPSS Statistics (formerly SPSS, i.e. "Statistical Package for the Social Sciences") is a proprietary cross-platform general-purpose statistical software package. [For SPSS Modeler, use 'spss-modeler' tag.]

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Cronbach's Alpha - reliability

In psychometric tests, we sometimes are instructed to end the test after the child has failed a determined number of items. Thus we end up with children who answered 30 questions and some who answered ...
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spss neural network forecasting with lags

I have 240 monthly data points and would like to leave 36 out of sample for neural network forecasting in SPSS. I made the covariates as lag of 1 [AR(1)] and have several questions to ask: What are ...
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Difference in performing two-way ANOVA and one-way ANOVA

I was asked by reviewers to retest my hypothesis that states A1 is better than A2, B1, and B2 (2x2 factorial design where A/B are two levels of the first factor and 1/2 are two levels of the second ...
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24 views

How to select the best number of clusters in cluster analysis in SPSS?

When I used SAS for cluster analysis, I used to use some plots of CCC, pseudo F and pseudo T^2 indices to help determine best the number of clusters. Not sure about this in SPSS, not familiar with ...
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Simple syntax spss question [on hold]

I am new to SPSS and I probably have a basic question. I have a syntax on a different file which has the file name .sps and a register with the file name .sav. The syntax should be a variable in my ...
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How to compare means of 3+ variable within a sample group

Grip strength for 128 athletes was measured at 3 various elbow angle (90, 180, 45) with varying position and arm posture. Now I want to compare means of dependent variables within each elbow ...
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1answer
30 views

How do I analyse a set of clinical data that has a variable number of measurements per patient?

Thanks in advance for any help you can offer. I'm a PhD student and have just finished recruiting for an observational clinical study. Basically, we have recruited 100 patients and performed imaging ...
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14 views

How to prepare data for anova or manova

I have a datafile (below is Gdrive link) and I want to prepare it for Anova/Manova tests. About Data: ...
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27 views

Test for repeated measures with large numbers of missing values

I have a number of independent continuous variables, such as HbA1c, waist circumference, total cholesterol measured in approximately 300 people over various time points (baseline, 3, 6, 12, 24 months ...
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15 views

Parametric versus nonparametric AUC from ROC curve

SPSS offers two ways to estimate Area Under the Curve (AUC) and its standard error, that is nonparametricly using trapezoidal rule or parametrically using binegative exponential distribution. I have ...
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74 views

Why does the post-hoc results in R differs the post-hoc results in SPSS?

I have run the same two-way Repeated Measure ANOVA in R and in SPSS. Following that I ran a Fisher's Least Significant Difference (LSD). R script ...
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24 views

Analysis of reaction times with missing data by trial/item

I have a developmental psychology study with one between factor (age) and two within factors (scale-3 and difficulty-2). I recorded reaction times but have eneded up with a lot of missing data for the ...
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12 views

Missing Value in SPSS Output

I'm running a multinomial regression and I can't figure out why SPSS is giving me a missing value under ACountry. Any thoughts? Thanks!
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22 views

Modelling Time Series in SPSS

I'm very new to statistics and I've been asked to create a time series model in SPSS. I've taken a list of articles from one journal, each categorized by their main topic (topics have been numerically ...
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29 views

Help with choosing the correct effect size

I conducted a two-way between groups ANOVA to test the impact of video gaming (gamer/non-gamer) and gender (male/female) on reaction time. I'm conducted my analysis using SPSS and received the ...
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1answer
25 views

SPSS: Regression Sample Size

I just wanted to know where I can see my sample size in the output of a linear regression. It must be in the ANOVA-Table in the column of the df. Is my sample size 487? ANOVA-Table Regression 2 ...
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1answer
73 views

Do Stata and SPSS give conflicting versions of Anti-Image matrices?

I read on p1 of the Stata Manual glossary that: The image of a variable is defined as that part which is predictable by regressing each variable on all the other variables; hence, the anti-...
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46 views

Multivariate regression in Tensorflow where dependent variables also depend on each other

Dear Stackoverflow community, I would like to understand how to implement a multivariate regression in Tensorflow, where all the dependent variables yn depend on both input variables xn as well as ...
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49 views

Help interpreting the output from a mediation analysis

Currently I'm working on some organisational research. Just to get a bit of a idea of what I'm research; I'm looking at impact of leadership on how enthusiastically work. I believe the relationship of ...
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1answer
31 views

what am i supposed to do if realiability test not up to 0.7?

hye. i have gathered 147 questionnaires with 39 variables the requirement for my research department need me to make the reliability test up to 0.7 or else it consider not reliable. i have tried ...
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12 views

Motivation of runners [duplicate]

I am currently writing a proposal and am confused on which statistics method I should use. I aim to examined the motivation of runners in participating a charity marathon and categorizing it. It will ...
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31 views

How to relate 2 sets of classifications (types of runners & motivations)

I am currently writing a proposal and am confused regarding which statistical method I should use. I aim to examine the motivation of runners in participating a charity marathon. It will use runners ...
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24 views

Thesis SPSS Regression help

I'm currently working on my thesis and would like some advice for the statistical analysis section. My hypotheses are: H1: Firms that belong to a product industry are more likely to establish a ...
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14 views

Suppression + Mediation?

I have a suppressioneffect, because a correlation between x and y is actually non-significant, but if I put in another variable (in a multiple regression), then the correlation between x and y becomes ...
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27 views

Logistic regression with 2 predictive variables

I need some advice for choosing the correct model. I have 3 binary variables: Risk (0 = the person doesn't take financial risks, 1 = the person takes financial risks), gender (0 = female, 1 = male), ...
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98 views

Reproducing SPSS GLM in R, changed coefficients

I'm trying to reproduce a generalized linear model in R. The original SPSS model has distribution Gamma, link Log, with a continuous dependent variable and all independent variables categorical. In R ...
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SPSS GENLINMIXED error message “subject field not used”

I am running the following syntax in IBM's SPSS: GENLINMIXED /DATA_STRUCTURE SUBJECTS=Subject# /FIELDS TARGET=any_error /TARGET_OPTIONS DISTRIBUTION=BINOMIAL LINK=CLOGLOG /FIXED EFFECTS=...
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Interpreting the Structure matrix in Discriminant Analysis

I was trying to do a discriminant analysis in SPSS and I have to interpret the output. But when I come to the table of Structure Matrix, I find difficulty in defining the variables I should use in ...
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30 views

How to interpret estimated coefficient of ordered logit regression which has a negative value

What is the interpretation of the negative estimate ($b$ value) in an ordered logit regression? That is, an "increase of one unit in the independent variable results in an increase or decrease of the ...
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Decision Tree with High Specificity and Low Sensitivity

I ran a decision tree on some data with over 1 million of observations, a binary dependent variable and a few dozens of independent variables, some partially correlated. I got weird results. The ...
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73 views

How to report non-normal distribution and Wilcoxon in APA style

I have within-subject design and want to compare the means of two conditions. I first run the test for normal distribution and used Shapiro and p values are ...
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1answer
17 views

Can we run an ordinal and multinomial logistic regression for combined independent variables' levels?

I have one outcome/dependent variable that can be ordinal or nominal and 3 independent variables. I have learned so far how to perform ordinal and multinomial logistic regression in SPSS between a ...
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How to Graph Moderation Effects on SPSS

I am conducting an independent research but am completely stuck on how to visualize my data. So I am looking for a moderation effect of peer sociometrics (ex. negative nominations, social preference)...
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1answer
24 views

Decision Tree Giving Impossible Splits

I ran a decision tree in SPSS, using the CHAID method. The result was a tree with many nodes. Some of the splits were impossible. For example: for a variable that is from 0 to 10 (in %), a split was >...
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SPSS | Repeated-Measures ANCOVA | Covariate

We are performing a RCT with 4 groups (1 control + 3 experimental), where we measured physical activity (PA) at baseline, post-test and follow-up. Although we have done stratified randomization, the ...
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Generalized estimating equations - Multiple binary responses per condition (spss)

I have a repeated measures design. Each participant has two visits, one on placebo, one on drug. The task has a number of conditions. 'Target' has 2 levels, MS and RNG. Within the Target condition ...
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23 views

How to analyze technology acceptance model hypothesis with regression analysis in SPSS

I want to ask how to do regression analysis using SPSS with my survey data. My survey data consist of 15 question items which belong to 4 groups: Perceive of usefulness, Perceive of ease of use, ...
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50 views

Data Aggregation Using ICC(1) & ICC(2) & Rwg

I am currently working on a thesis in order to graduate, and I need help to understand how to justify aggregation. My issue is that I don't quite understand what is require to do to test ICC(1), ICC(...
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1answer
38 views

the graph of log(-log) for Cox model on survival analysis

I'm studying Cox Regression model on Survival Analysis. While testing validity of Proportional Hazard model, I will use log(-log) graph method in SPSS. First of all, I mention which procedure I'm ...
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1answer
43 views

What to do with negative ICC values? Adjust the test or interpret it differently?

For my graduation thesis I am doing a study for the test-retest reliability of the tendon thickness of a particular muscle. So this study contains one rater and 70 subjects who have been tested at two ...
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17 views

Auto-correlation Assumption

I am testing the auto-correlation assumption of OLS. My study is conducted on the most active companies on the Egyptian stock exchange over a period of 5 years. Not all companies included in the ...
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1answer
20 views

Multinominal vs Ordinal regression

What is the difference between ordinal and nominal regression? If i want to run driver analysis after regression and have 3 variables, the DV is 5 point scale question with options "Very good, good, ...
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Specific Differences B/T SPSS Grad Packs

I have been using the Trial Version of IBM's SPSS Statistics Desktop v. 24 I would like to purchase the most affordable option that enables a few but very specific features my research requires. ...
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Identical mixed models in SPSS and R nlme, with different degrees of freedom. Which to trust and why?

I am analyzing a multilevel dataset with an AR(1) error structure and random intercept and slope. I fit what I believe is the exact same model in SPSS and R- my coefficients and standard errors are ...
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81 views

R vs SPSS - simple effects analysis in mixed 2x2 ANOVA scheme - same data, different results

I prepared a mixed 2x2 ANOVA design analysis both in SPSS and in R. The SPSS script is correct, but in R script there is a mistake somewhere. To test that I generated artificial data from a normal ...
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1answer
20 views

what's the difference between weighting and transforming?

In regression analysis, what's the difference between weighting and transforming when it comes to spreading residuals? For example, we need to weight the model $y=ax+b$ by $1/x$, isn't it just ...
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29 views

Setting Linear mixed model for within-subject crossed factors

I have problems in undertanding how to correctly run a mixed linear model. I have done an experiment to compare three groups (1 between-subject factor); for each subject, 2 sensory stimuli are given (...
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1answer
57 views

Linear regression with unbalanced dummy variables + not normally distributed residuals

I am conducting a multiple linear regression analysis in SPSS. My DV is a score between 0 and 6, and my predictors are: one dichotomous nominal variable (native vs. non-native speakers) one ...
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36 views

Significant model but not the predictors? (Logistic regression) [duplicate]

I'm doing a binary regression, with two predictors one binary and one continuous. I'm using the enter method. I want to know if my model can be significant when I compare it to the model with only ...
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I have two independent variables ( 1 categorical, 1 continious) and one dependent varrible

I want to measure how cultural stress impacts male and female graduate students` level of marital satisfaction. But I am not sure what is the best analysis test in SPSS. Both cultural stress and ...