Frederik Feys

11 Questions 26 Answers 0 Followers

Questions related from Frederik Feys

What formula to get the number of masks needed to wear to prevent 1 infection?

Hi everyone ! I have a challenging time to crack the code in the following analysis...

28 July 2020 4,136 1 View

We found an association, but what confounding might be at play?

Hello everyone Who is expert in discovering confounding? We just wrapped up preliminary work on the possible association between psychological well-being and covid-19 survival. We found a weak...

05 June 2020 2,017 0 View

Your idea of this abnormal plot of a uni-variate regression?

Hi everyone I modeled using a uni-variate regression.This is a plot of fitted versus residual values. Clearly this model violates the assumption of normality. What could be going on? Thank...

26 May 2020 8,489 3 View

How to analyse the agreement of two scales?

Hi Everyone, I want to analyse how well two scales agree for detecting changes in wellbeing. I look at the Bland-Altman Method. One scale is a simple score from 0 - 10 for wellbeing. The other...

28 July 2018 4,685 9 View

How to add response bias into a repeated measures mixed anova model?

Hi everyone! I have a 2 repeated measures that was asked at 3 moments in time (within-subject factor). We doubled the measure to control for response bias. So the measure (likert scale) probed...

03 April 2018 2,590 3 View

Logistic regression's Nagelkerk parameter extremely small?

Hi everyone! I am stuck with a seemingly very simple logistic regression analysis. What is the impact of diabetes(nominal var, values 0-1) on preterm birth (nominal var, values 0-1)? In the...

01 November 2017 2,015 9 View

Are you sure that randomized clinical trials are valid... Do you want to comment on the protocol of this new study?

What if people volunteering in clinical trials can find out by experiencing medication side-effects if they are on placebo or not? This issue intrigues me... So I wrote a protocol to search for...

27 April 2015 8,191 11 View

Can you help me peer review our manuscript?

We submitted our manuscript to PlosONE. However, the journal has a hard time to find peer reviewers. Therefore, I decided to post the manuscript here and make it available to all of you for open...

26 July 2014 9,179 14 View

Effectiveness of psychotherapy versus no treatment in depression?

Can anyone point me to the best available evidence that compares psychotherapy with no treatment in adult depression?

14 August 2013 5,984 39 View

Science censorship threatens science's core business

Hi everyone, The world is in crisis; scientific communities work to their best to find answers. From our side, we worked on a risk assessment for the lockdown strategy, focusing on psychological...

01 January 1970 6,810 0 View

Leukemia survival and watchful waiting

Hello everyone! A standard approach after the diagnosis of leukemia is immunosuppression and later on transplantation of donor cells. A doctor may state that "if we do not start therapy...

01 January 1970 5,178 10 View