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

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3
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1answer
17 views

What is a paired observation or paired variable?

The question kind of asks itself, can anyone explain what a paired observation or paired variable is in basic terms? My data consist of the number of words learnt in a week for 19 different ...
0
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0answers
21 views

What type of statistical analysis would be best to use?

I'm awful at statistics so could really use some help regarding statistical analysis and which approach to use. Here is what I know - I need to determine, based on stats I have been given, whether ...
0
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1answer
20 views

In SPSS, should I calculate the mean score or the total sum score?

Are there any differences between mean scores and total sum scores? I know how to calculate both, I just don't know if there is one of them that is preferable? Also, the scores will be used for ...
0
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0answers
3 views

Can linear regression slopes be used as covariates in an univariate ANOVA?

Sorry if this has been asked before but I've searched a lot without luck! The closest thing was the following question, which partly answers my question: Can slopes in linear regressions be used as ...
0
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0answers
10 views

Explaining mixed-model interactions with ANOVA?

I have searched through the answers on this forum and I couldn't find any detailed explanation to my question about linear mixed models. Here is my setup: 4 groups with treatment X (one of which is ...
0
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0answers
21 views

Is the constant value ignorable?

I am running a linear regression on SPSS. Basically I have 2 independent and 1 dependent variables; and I would like to understand which of my independent variable is more effective on the dependent ...
1
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1answer
20 views

how can i calculate the degree of agreement between two methods

I have a sample of 26 learners and I used two different methods to identify their personalities. My problem is I am not that good in statistics and I want variables that I can use within SPSS to ...
1
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1answer
42 views

Large value of exp (B) in binary logistic regression SPSS what is wrong? [duplicate]

I had a very large value for Exp(B) in SPSS binary logistic regression. What is wrong and what should I do?
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0answers
9 views

Using standard error or standard deviation bars in within-subject design: How should i interpret and report this?

I have gathered results from a study that tests participants reaction time in a task that tests two conditions simultaneously by randomizing the trials within the experiment. I have used a wilcoxon ...
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0answers
21 views

Appropriate Test for Statistical Significant Change in Values Over Time [duplicate]

I have four number of values for number of policies within a given field put forward in a given year. I want to find if there is a statistically significant increase or decline in the number of ...
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0answers
25 views

What test should i perform in SPSS

I have data from two groups (placebo and supplement A) which I tested regarding happiness ranked from 1-10 (i.e. ordinal data). I have test results for pre test, week 1, week 2, week 3 and week 4. I ...
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0answers
7 views

Covariates and interactions

I have collected data and am trying to interpret my results. I am analysing data on plant traits between treatments, hot and cold. The plants I grew myself and are all from the same population. I ...
0
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0answers
7 views

pooling the results from a repeated measures using multiple imputation

How can I pool the results from a multiply imputed repeated measures analysis? SPSS does not the pooling, as it does for other analysis types. From a technical standpoint, it is not at all clear. ...
0
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1answer
32 views

Which statistical test to use?

I have acquired data with multiple variables that I need to test. My dependent variable, Seed number, is tested between Ecotypes but also between Treatments (hot and cold). I need to see whether Seed ...
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0answers
6 views

Multiple Imputation on SPSS number of parameters issue

I have to do several analysis on scores from questionnaires but unfortunately, I have some missing data and I was told that doing multiple imputation to replace them was the best solution. So far I ...
1
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1answer
67 views

Which test statistic should I use?

I have collected data consisting of radiation dose from 2 different equipment. I have taken 3 readings (reps) on each exposure using both the equipment. The data looks like "at 5 mAs and 55 kVp" ...
0
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1answer
26 views

ANCOVA or not? Non continuous covariate

I have done an experiment with an independent and dependent variable. I repeated the experiment 5 times. Obviously all the repeats will be different from one another, some of them significantly so. ...
0
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0answers
15 views

Is it possible to conduct confirmatory factor analysis in SPSS?

I found the factor analysis of SPSS seems to only support EFA, but I am not sure. Is it possible to conduct CFA in SPSS? If not, what statistical tool can be used to conduct CFA? I especially need ...
1
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3answers
58 views

At what point do significantly different groups start to differ?

I have two groups: a control group (N = 91), and a treatment group (N = 54). I did a t-test in SPSS that suggests that there are significant differences between the two groups in terms of the variable ...
1
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2answers
38 views

Homogeneity of variance is violated for z-scores but not for raw data?

Is this a normal thing to happen or have I done something wrong in SPSS? I am using a Levene's test.
1
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0answers
17 views

Unsure which tests to use now that my continuous symptom scale has been replaced with its underlying subscales

I've been working with a large data set in SPSS, mostly focused on the symptom scales of one developmental disorder. I have data from two separate time points, a few years apart. So for example I've ...
1
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0answers
22 views

Logistic Regression with Household Fixed Effects, SPSS

I have cross-sectional data on households and individuals for several countries. I am interested in the marginal effect of a particular dichotomous individual variable $D_i$ (dummy denoting whether ...
0
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0answers
22 views

ARIMA model in SPSS [on hold]

I am trying to run a regression on several independent variables on SPSS and the Durbin-Watson statistic was very low (0.5). I then employed an AR(1) model by using the time series modeler but I ...
0
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1answer
38 views

Confused with SPSS ordinal regression output

I'm a bit (actually, totally) confused with SPSS ordinal regression output. Let say we have dependent variable score=1,2,3,4,5 (higher is better) and one predictor gender=male,female. We run Ordinal ...
0
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0answers
14 views

Mediation analysis with Likert scale mediator

For my master's thesis, I need to conduct a mediation analysis. My independent variable is the condition assigned, with three different conditions: high income, low income and neutral. I coded the IV ...
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0answers
20 views

Likert scale and correlation: when respondents are asked whether or not they agree with a statement

I'm having trouble figuring out how to go about applying correlation and/or regression to a set of Likert scale items that are statements that ask the respondents whether they feel two items are ...
1
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0answers
18 views

Repeated Measures ANOVA?

I am an undergraduate student studying psychology using SPSS to analyse my data. I have 2 conditions of the IV of treatment (treatment or no treatment) to test pain tolerance levels which is measured ...
0
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0answers
20 views

Chronbachs alpha = negativ. [duplicate]

I created a survey consisting of 5 standardised questionnaires. 3 of the questionnaires requires reversed items, and I did this. The chronbachs alpha turned out to be great for these. BUT When it ...
1
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0answers
50 views

How to calculate age and sex-adjusted z-scores in SPSS

I have a large data set in SPSS which includes triceps skinfold measurements for children at various ages. I would like to create z-scores for these measurements which adjust for sex and age... is ...
0
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0answers
11 views

MARS Modelling for large no of variables

I have data with more than 200 predictors, can MARS be used for such a data? Objective is to identify predictors which are most important across each category. So these 200 predictors are from 6-7 ...
0
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1answer
46 views

What does “varimax” mean in SPSS factor analysis?

In the rotation options of SPSS Factor Analysis, there is a rotation method named "Varimax". If I choose this option, does it mean the same orthogonal rotation techniques of Principal Component ...
0
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0answers
10 views

Longitudinal design with missing values at first time point

I carried out an intervention with 3 time points (2 pre-intervention, 1 post-intervention) with 2 groups ( n =18 intervention, n = 22 control). Basically I am missing some observations from some of ...
0
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0answers
14 views

Gender differences against experimental IV conditions

I am a psychology student using SPSS to analyse my data. I have 2 conditions of the IV of treatment (treatment or no treatment) to test pain tolerance levels which is measured by the DV of pulse rate ...
2
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0answers
11 views

Correlating aggregated values between groups

I am currently analysing data from household surveys in 27 Indian villages in 7 states, with about 30 cases in each village (807 in total). The aim is to find relationships between various factors and ...
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0answers
8 views

Correlations and follow up tests

I am employing non parametric statistics because my research questions are exploratory. I have a mixture of dichotomous variables (age, gender), continous (height, weight), categorical (autism: ...
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0answers
18 views

Repeated Measures Design but also testing order effects in SPSS

I am a psychology student using SPSS to analyse my data. I have 2 conditions of the IV of treatment (treatment or no treatment) to test pain tolerance levels which is measured by the DV of pulse rate ...
1
vote
1answer
27 views

Why do final cluster centers change after applying results from past K-Means clustering (SPSS)?

I have a question regarding what happens after I apply k-means clustering centers to a new data set. Basically, I ran k-means clustering on a dataset1, saved the cluster centers, and applied it to a ...
1
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0answers
38 views

Non parametric test/ANOVA/Parametric test?

My study design is a pre-post test measurements with a control group. My study design is Creatine Kinase being measured before and after exercise, and my subjects are divided into two groups; either a ...
0
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0answers
19 views

Which test would be appropriate to test multiple variables?

I have a data on users with 5 personality variables. The users had to pick a logo for three different projects (most likely, may be, least likely). The question is why the users chose the logo they ...
2
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0answers
65 views

Polynomial contrast in mixed anova with type III SS

I'm trying to replicate SPSS output in R for a mixed ANOVA with a polynomial contrast to test a linear trend. I fitted a mixed ANOVA in R (see code below), but I can't figure out how to get the ...
0
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1answer
40 views

How can I correlate groups of variables?

I have conducted a survey to find out the correlation between organizational justice and turnover intention within an organization. So, in the survey, I have asked some Likert-scale questions around ...
0
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0answers
18 views

statistical modelling for imbalanced data

I am dealing with a binary response (good/ bad) type data set of size 2153, which reflects a dependent variable. Out of these, only 67 are in favor of "bad" and the remaining are of "good". Also, i ...
4
votes
1answer
133 views

Different shapes of an ROC curve

What are the possible shapes of an ROC curve? Is it necessary for an ROC curve to be shaped like a normal distribution curve? Can we regard the following two curves as ROC with the area under the ...
1
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0answers
37 views

Sensitivity Analysis used in SPSS Neural Network Package

What is the sensitivity analysis used in SPSS Neural Network's independent variable importance calculation? The explanation provided by SPSS is very vague. Is it the same as the semipartial ...
0
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0answers
35 views

Linear Probability Model Construction

I am dealing with a questionnaire consisting of 15 questions. I performed a factor analysis to all the questions and it has given three factors each consisting of 5, 7 and 3 numbers of questions ...
0
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0answers
16 views

Performing t test, one-way ANOVA from mean and SD using SPSS

I have the following summarized data: Group 1: n=44, mean 12.1, SD 2.0 Group 2: n=56, mean 13.2, SD 2.5 Group 3: n=42, mean 12.7, SD 2.3 Is it possible to perform the t test comparing means of group ...
0
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0answers
10 views

Hypothesis for customer dissatisfaction

I am doing research paper that contain the hypothesis of "Building conditions generate customer dissatisfaction among buyers and/or renters". Both building conditions and customer dissatisfaction are ...
0
votes
1answer
27 views

Generalized linear model with random effects for skewed data

I'd like to use SPSS Generalized Linear Model to analyze a dataset of insects collected from one particular species of vegetables. I have following variables: NUMBER (number of insects collected) ...
0
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0answers
19 views

Multiple time points, relation between quantified change in environment and sample population

For a current research, I'm trying to view a relation between a country-level variable index and the financial structure of companies in that country over time. I have annual data for four years, ...
0
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0answers
10 views

Approaches for multivariate nonlinear (but parametric) regression?

I have some data that is nonlinear, but is curvilinear. It is two factors and a dependent variable. Each factor has a pretty good fit when applying a growth curve when compared against (this is ...