Roger Keller Celeste

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Questions related from Roger Keller Celeste

How can bibliometric/scientometrics studies help in evaluating trends in specific research topics?

Some research topics are very specific within their fields, but research agencies general need to have broad statements and need to support all areas. If we look closely to the amount of grants in...

08 August 2016 7,858 4 View

What are characteristics of core journals, apart from being those that publish more?

Bradford's law of scattering tell us that, it we rank journals according to the number of articles in a specific field, the top 1/3 can be considered "core journals". This only describes core...

02 February 2015 5,747 3 View

How often do we have retraction nowadays? What could be an estimate of the percentage of any type of fraud?

Here an example of a paper that has been withdraw because it had already been...

12 December 2014 8,749 0 View

What are current challenges for new cohort studies?

It is easy to go to epidemiological book to see how to plan a cohort study. The traditional design is not at issue nowadays (we do not have groups formed based on exposure), but many old problems...

10 October 2014 6,983 2 View

What are the mechanisms linking health status and (health related) quality of life?

If it is because people with some illness tend to become concerned with their condition, then I could rephrase to: why does being concerned with health affect your quality of life? Is it because...

07 July 2014 4,510 4 View

What is the best software for multilevel modelling?

I work with effects of contexts like the place of residence, and use different softwares that fit multilevel models (R, Stata, MLWin, Mplus). Almost any software does this analysis, nowadays (SAS,...

11 November 2013 4,441 8 View

Do you know about Exploratory Factor Analysis of the Oral Impact on Daily Performance (OIDP) questionnaire?

This is one of the most used instruments to measure oral health related quality of life but it has been used in many different ways. Some researchers used only the frequency score, others multiply...

09 September 2013 9,671 2 View

Many say that quality of life is a multidimensional construct. Are Oral Health Related Quality of Life instruments multidimensional?

A recent article (below) has challenged the "multidimensionality" of a popular instrument. Actually, people are used to calculate just one overall score, implying just one factor, so it does not...

09 September 2013 2,010 9 View

Public Policies are part of Welfare Policies. How to define and how to measure welfare?

Since Titmus and Esping-Andersen, we have always categorized three types of welfare regimes among developed countries. Could we expand this to Asian, Afrian and Latin-america countries? Would such...

12 December 2012 620 2 View

There is an idea that the increased number of publication led to a lower mean number of citation (lower quality papers). Could this be true or not?

There is a newspaper material explaining the above cited...

01 January 1970 1,020 3 View