Is there a validated Swedish, Norweigan or Danish version of the International Index of Erectile Dysfunction (IEEF5)?

The IEEF-5 is transalted and validated for several languages, but I have not found a validated version from Scandinavia. Grateful for information regarding this questionnaire and its usability,...

06 July 2018 3,643 0 View

What is the optimal procedure for testing pragmatic validity of instruments after translation?

To ensure that translated instruments have a pragmatic validity and thus will be both used and and that the results will be of interest to clinical practice, my question regards the optimal...

02 March 2018 9,344 7 View

Are there questionnaires measuring self-efficacy and trust for patients and professionls?

I am looking for reliable and valid questionnaires to measure self-efficacy among health care professionals and also among patients (preferably with chronic diseases, but also for questionnaires...

11 December 2017 9,042 0 View

Is there any scientific methodology written on "trichotomization"?

In quality reports regarding school results etc it is common to use a 10 point numeric scale and then trichotomizing the results into three categories from the original ten categories, when...

10 November 2015 1,803 5 View

What would you cobnsider to be the lowest accptable reasponse rate concerning online-questionnaires?

04 May 2015 6,445 3 View

What are your experiences of scoping studies compared to more systematic reviews?

In what cases would the different research models be most appropriate and why? What are the benefits and the disadvantages of using them?

09 October 2014 6,670 0 View

What is the correct sample size when performing av explorative factor analysis for construct validity in a psychometric study?

In the literature that I have found so far, the answers to this question is varied and I am interested in a getting a clearer picture and recommendations.

08 September 2014 5,463 19 View

Can an exploratory factor analys from an original psychometric testing of an instrument be used in a confirmatory factor analysis in a new language?

Can an exploratory factor analys from an original psychometric testing of an instrument be used in a confirmatory factor analysis in a new language, i.e. when translating, adapting and testing the...

08 September 2014 4,015 4 View

Which is preferable for a scale in a questionnare, 3 or 5 options for answers?

In adapting a questionnaire with the options "agree", "uncertain", "disagree", my questions is if it would be preferable to include the options of "Partially agree" and "partially disagree". What...

08 September 2014 1,867 13 View

Can a questionnaire be considered valid, if the researcher has used pragmatic validity testing in several steps?

The questionnaire covers work related health from the perspective of the worker, the organization and the management investigated from the physical, psychological and environmental view. The...

06 July 2014 5,289 2 View

What is the best way to keep an anaerobic chamber anoxic in the absence of hydrogen?

I'm a graduate student who works with an anaerobe, so I often work in an anaerobic chamber. I've been working on an assay that involves the steady-state of the quinone/ quinol pool. Anoxic...

03 March 2021 2,971 1 View

Good sites to recruit survey participants on a grad school student budget?

Any good recommendations for participant recruitment for online surveys on a grad school student budget?

02 March 2021 4,293 4 View

Is there a recitation score bank system for fair evaluation and assessment of student recitation?

In actual and virtual class, even if there is rubric for recitation, students may still fail to receive fair grades or scores. Others are active in recitation and others are not or others may fail...

26 February 2021 8,387 3 View

Do you think there is cognitive oversaturation in the current pandemic? What impact can this have? And other manifestations?

Dear colleagues, Do you think there is cognitive oversaturation in the current pandemic? What impact can this have? And other manifestations? The question is mainly aimed at adolescents (pupils,...

23 February 2021 7,796 4 View

Must a control group to be in the same semester that a experimental group for a study in education?

Hi everyone, I'm researching about mobile learning in higher education. Due to the small number of the students in the semesters, I cannot have a experimental and control group together. I'm...

22 February 2021 3,653 11 View

Latent profile analysis based on two variables/sources of data?

Hello, for my master project, I would like to conduct a latent profile analysis about self-regulated learning skills. I would like to take two different measures into account when creating the...

21 February 2021 2,326 3 View

Where can I find raw quantitative datasets on ecosystem services?

I'm an Undergraduate student on the search for a research topic which has to involve any ecosystem service(s) and a response to environmental change. I'm looking for raw quantitative data sets (I...

19 February 2021 5,911 2 View

Person-Codes for questionnaires in longitudinal studies: Is there an easy solution for better matching-rates?

Hi, I have a problem regarding matching of longitudinal data in my field of research (university students). We have a Person-Code for matching data measured in different time points, but 30%+ of...

17 February 2021 3,075 4 View

Level 1 pre-post multilevel regression: Panel data or ANOVA approach?

Dear colleagues, I am currently teaching myself in multilevel analysis using educational data. I found few to zero literature on basic analysis methods. In my context we frequently use level-1...

17 February 2021 9,378 5 View

What are the available keys and descriptions for the identification of lice and fleas in domesticated animals?

I am an undergraduate student at the University of Peradeniya Sri Lanka, currently working on ecto-parasites in domesticated animals. I found difficulties in the identification due to a lack of a...

15 February 2021 277 1 View