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After 19 weeks, the improvement was 4.4 additional matrix questions.
Before training, participants were able to correctly answer between 9 and 10 of the matrix questions.
The three matrix questions and items are further described in Table 1.
The questionnaire consisted mainly of multiple-choice and semi-closed questions as well as a few matrix questions.
I felt confident answering the environmental matrix questions, while in the toxicology part I felt sometimes on thin ice".
Additionally, respondents answered three Likert-scaled matrix questions: How important are the following factors in considering your career in medicine?
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Figure 1 shows a representative example of a matrix question.
PCA analysis of each set of matrix question items revealed four factors in each set.
2. Latent factors were extracted from responses to each matrix question via principal components analysis (PCA).
We also created a case study matrix specifying questions, outcomes, and indicators (Appendix B).
The case study team used a logical framework for ECD in Tanzania (Appendix A) and a case study matrix specifying questions, outcomes, and indicators (Appendix B) to establish a structure for thematic analysis.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com