Edbert Chia

10 Questions 5 Answers 0 Followers

Questions related from Edbert Chia

How can maximum likelihood for generalized linear mixed models be used to predict missing data in a randomized control trial?

Good day, I am interested in understanding a research paper that used the maximum likelihood of a generalized linear mixed model to predict the missing data from participants who did not complete...

20 August 2021 484 3 View

How to calculate sample size for non questionnaire type tests?

I am trying to assess the reliability and validity od a Stroop test. Which is broken into three parts. One where the person names colour words, names colours seen and names colours on congruent or...

19 February 2019 3,566 0 View

How to perform meta analysis on the reliability of a tool?

Good day, I am attempting to review several studies that mention the reliability and validity of a Stroop test. I wanted to know what is there a technique that can take the reliability...

21 September 2018 5,135 3 View

WHat does the warning, "Scale has no variance" indicate when performing cronbach alpha calculation on SPSS, and how does it affect the alpha value?

I am conducting a Cronbach Alpha calculation for 9 participants on a 96 item Stroop Test and received this warning from SPSS. The alpha value reported was 0.83. But with that warning does that...

21 August 2018 9,337 1 View

Can discriminant function analysis be performed with non normal data?

My data so far seems to be not normally distributed can I still perform discriminant function analysis to distinguish the performance of young and older adults?

21 August 2018 9,368 2 View

How do I calculate Cronbach Alpha for a test with 3 parts, which are then placed into a formula to forma final score?

So I want to calculate the internal consistency of a test which has three parts. Each part has 96 items. The test has a time limit of 45 seconds, and participants are not allowed to do the next...

28 June 2018 3,116 2 View

How to calculate internal consistency for a test whose items appear at random for each participant?

I am designing a Stroop test and want to calculate it's internal consistency for the reliability calculation. However the test items will appear at random for each user. What statistical...

15 January 2018 3,253 2 View

What tests that can measure cognitive abilities to differentiate healthy and non-healthy participants, and can be administered online or computerized?

I am looking for a test that can measure cognitive abilities that allows me to differentiate a participant either they are health or not (e.g. dementia, Parkinson's or any brain injuries). I...

09 October 2017 5,761 1 View

What is the usual ratio of congruent and incongruent items in the Stroop Test, and is there evidence for why?

I am currently trying to find information to build a computerized Stroop test, it has come to my attention that many research papers do not specify how many items are in their Stroop tests and...

06 October 2017 4,374 5 View

S.O.S. Can a longitudinal study be a repeated cross sectional design?

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4669300/ In this journal under longitudinal study designs the author states repeated cross sectional studies. Which I find odd, isn't longitudinal and...

02 October 2017 6,179 8 View