Are negative valued indicators allowed in SEM?

Hello, Using secondary and continuous data, i am trying to run a SEM with two latents. One indicator has both negative and positive values. Is it wrong? (I am gonna run the model in AMOS) Thx on...

14 February 2021 2,801 8 View

How to de-clump HEK293 suspension cells?

I have a problem with clumping of HEK293 suspension cells, and this clumping problem decreases the cell viability. I will transfect the cells if I were to reach a favorable cell count. What can I...

17 January 2021 354 4 View

How to estimate dichotomous variables in SEM?

14 October 2020 5,912 3 View

Is single indicator usage is appropriate in SEM when the data ise continous?

Hello, to use single indicator in SEM , reliability is constrained to cronbach alfa. But when we use continous data we do not calculate cronbach alfa, then can we use single indicator latents for...

02 May 2020 3,455 3 View

In SEM how we favor a model?

Hello, In structural equation modeling can we favor a model over the rival one because of better multiple correlation? I have two rival models. First is slightly have better fit values than...

16 November 2019 5,337 1 View

How many cause variables can we include in a MIMIC model?

hello, I want to run a MIMIC model in AMOS, is there a ideal number of cause indicators? Thanks on advance,

22 September 2019 4,046 9 View

Is scale mean a statistic that can be tested for significance?

Hello, My friend created a hypothesis "Is x (variable) is significant?". I found this hypothesis weird:) Anyway, he insists on testing this. I calculated the mean of the scale (x) on SPSS. Is...

31 July 2019 5,842 5 View

In SEM, can we link egzogenous observed variable to indicator of endogenous latent?

In my structural equation model, I have a an observed egzogenous variable, according to modification indices, can i link it to an indicator of endogenous latent? Thanks in advance

01 November 2018 3,191 6 View

In Amos I can not fix parameter variance to 1?

I am trying to run Second degree cfa in AMOS. As far as I know I must fix second degree factor's variance to 1. But when I right click to I can not see fixing option.I mean there is no box to fix 1.

20 July 2018 9,485 2 View

I got a non positive definite warning on SPSS?

I have 40 observations and 32 items and I got non positive definite warning message on SPSS when I try to run factor analysis. Should I increase sample size or decrease items? Or both of them?Thanks

18 June 2018 5,762 3 View

Which group formation theory do you recommend for projects that aim to bring together entrepreneurs for training for regional development?

I would like to have ideas about which theories of group formation are suitable for entrepreneurial training projects, with the aim of creating bonds, building trust, and collaboration for...

28 February 2021 4,223 2 View

Can anyone help me with the administration of the "Mind the Gap" Scale for satisfaction with transition to adult care?

We are working on a study focused on adolescents' transition to adult care and are looking for a validated measure for satisfaction with the transition. So far the only measure that we have came...

28 February 2021 2,338 1 View

How can I set up a good fit SEM model in AMOS?

I am trying to make an SEM model in AMOS for my dissertation but having some trouble with getting a good fit. I am looking for relationships between self-efficacy reported on a Likert scale and...

26 February 2021 8,642 4 View

First time secondary research, some points I should keep in mind?

I am conducting secondary research for my dissertation for undergraduation (Psychology) , what should I make sure my proposal consists of? Are there any tips I need to keep in mind?

22 February 2021 6,035 1 View

Which vial septa the right one to be used for HPLC?

This is the unanswered question stored very long in my mind and till now I could not find a right answer. Google search educated me that the red surface is the PTFE material compatible to wider...

21 February 2021 546 3 View

ANCOVA controlling baseline in RCT - how to perform power analysis and sample size estimation?

Hi, I have a simple question. I am hoping to perform a power analysis/sample size estimation for an RCT. We will be controlling for baseline symptoms, and using post-treatment or change scores as...

19 February 2021 2,648 23 View

Is it possible to obtain a negative cronbach alpha?

Good evening everyone. If a questionnaire has 4 factors measuring different constructs as for example CAMI questionnaire measuring attitudes toward the mentally ill that has four factors:...

18 February 2021 3,223 3 View

How to analyse a (perceptual) study using differing/comparable sets of stimuli?

I plan on running an online perceptual experiment that has, let's say, 100 unique video stimuli altogether. Since these are too many to be rated by every participants, I would like to present the...

15 February 2021 7,444 2 View

Nuances in the digital twin concept. Opinions?

Hello everyone, I am currently working on the state of the art of the digital twin concept, and after seeing the categorization made by Kritzinger, W. et al. (2018) [Digital Twin in...

14 February 2021 2,107 3 View

Can I use a categorical covariate in a Generalized Linear Model in SPSS v.26?

Hello everyone, hope you are well. I am planning to use a Generalized Linear Model in SPSS. I would like to add gender to the model as a covariate, however from what I have read, only continuous...

14 February 2021 8,937 4 View