How to do a repeated measure anova in spss with two unmatched groups?

We conducted an intervention study with three measurements of fear in three time points. Results showed that two groups were not matched for two demographic variables (education level &...

31 December 2018 4,204 3 View

No title

10 November 2016 7,039 10 View

Does reverse worded items in questionnaire desighning influence its construct validity or reliability?

02 March 2016 7,360 17 View

Are yielding good fit indices enough for concluding that a structure for a scale is acceptable? Are factors correlations important?

I run a CFA on a 14-item scale. Although the fit indices are relatively good (RMSEA= 0.066 (CI [0.053, 0.078]), SRMR=0.069, Chi-square/df=2.71, P

01 February 2016 572 6 View

Is there any cut off value for Childbirth Attitudes Questionnaire which measure fear of childbirth??

The Childbirth Attitudes Questionnaire was validated in Farsi. it is recommended to use cut off value=28 for identifying fear of childbirth. I could not find any references indicating so. It is...

06 July 2015 7,196 8 View

How can we assess the ceiling effect or floor effect of a questionnaire?

Referees usually asks about the existence of ceiling effect or floor effect in the process of instrument development. I am interested to find the way I can statistically assess them.

06 July 2015 4,710 12 View

Is it essential to assess normality of items before doing factor analysis?

My questionnaire composed of 49 items. none of them are normally distributed. Is it correct to do a CFA or EFA with non- normal data?

31 December 2014 4,841 13 View

Does ceiling effect of the items of a questionnaire influence the results of Factor analysis?

The questionnaire I worked on consists of 49 items rating on a 6 point likert scale. I found that most participants chose the highest point of many items. However, the results of CFA are good? Is...

31 December 2014 8,396 8 View

Can anyone make suggestions for using the crosswise method?

I am interested in designing questions for assessing sensitive domains. I know that the Crosswise method is suitable, but I do not know how it works.

05 June 2014 5,147 4 View

Is there any reference indicating that the low number of items of a subscale of an instrument is related to unsatisfactory Alpha coefficient value?

alpha Cronbach < .6

03 April 2014 1,295 6 View

Binary Logistic Generalized Linear Mixed model in SPSS. Is it doable?

I want to analyses the proportion of swimming sperm of three species of fish in two salinities. To analyse the proportion of swimming sperm in a Generalized Linear Model, I would use a Binary...

03 March 2021 2,297 3 View

What test should i use in comparing the correlation between categorical and continuous variables?

Dear all, I have the variable (Surgery duration) represented by values in minutes and the variable (preoperative neuropraxia cases) represented as (Yes/No) values. I want to compare these two...

03 March 2021 5,427 5 View

Logistical regression using SPSS for a dichotomous dependent variable, with an independent variable of 1, 2, 5 and 10 seconds?

I have an experiment with 28 participants The independent variable is the times 1, 2, 5, and 10 used as the cross hairs during a task These 4 times were tested using 4 different blocks, each...

03 March 2021 9,692 2 View

How to find the mean, SD and CI in SPSS?

Hi, I hope that someone can help me with this task: I have 5 groups of participants which are numbered in SPSS from 1 to 5 (according to their group number) and are all under the variable group....

03 March 2021 506 3 View

What degree of missing data in a particular case/participant results in Expectation-Maximisation no longer working?

I'm dealing with a mediation model and am using the PROCESS module in SPSS. Due to SPSS and PROCESS being limited in the imputation methods - being unable to handle multiple imputation - the other...

02 March 2021 4,362 1 View

How to code open-ended questions in SPSS?

Hello all, In SPSS I am going to code 2 open-ended questions. I have already read all the answers and I made a list of the most important categories to which I can code the answers. This question...

02 March 2021 1,757 4 View

The procedure compute?

02 March 2021 5,204 3 View

Does anyone know what a '.' means in SPSS?

Hi everyone! I was wondering if anyone would be so kind as to help me with regards to my data set on SPSS! I was checking for multivariate outliers via the standardised residuals ('Linear...

02 March 2021 7,910 3 View

How to calculate BREQ 3 questionnaire?

how to calculate BEHAVIOURAL REGULATION IN EXERCISE QUESTIONNAIRE BREQ 3 ,which contain 24 questions and each question has 5 answers (0- Strongly disagree , 1-disagree, 2- Neither agree nor...

02 March 2021 811 3 View

What SPSS analysis should I run with one IV (with two levels) and two DVs?

Hi, I am trying to figure out which test would be most appropriate to run for the following question: Is there a difference in task blood pressure between smokers and non-smokers? There are two...

01 March 2021 8,235 2 View