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Category Archives: statistics
The importance of neutral results
This is the third posting in this morning’s trilogy about research methods, and this one was prompted by an article in this month’s issue of Physics World : Ball, P. (May 2016), No result, no problem? Physics World, 29(5), 38-41. … Continue reading
The unscientific method
The title of this post is copied from another New Scientist article, this time by Sonia van Gilder Cooke, and published in Issue number 3069 (16th April 2016) on pages 39-41. The article starts “Listening to When I’m Sixty-Four by The Beatles … Continue reading
Simpson’s paradox
Back in November, I posted about the fact that I was going to be more bullish about the fact that I am a physicist but that I do educational research. As I try to build my confidence to say some … Continue reading
Posted in research methods, Simpson's paradox, statistics
Tagged research methods, Simpson's paradox, statistics
2 Comments
More lies, damned lies and statistics
This second ‘rant of the day’ focuses on practice which, I think, arises from the fact that most people are not as fortunate(?) as me in having data from hundreds and thousands of students on each module each year. It … Continue reading
Victorian clergymen
This is more ‘rant of the day’ than ‘quote of the day’ but I’d like to start with a quote from my own ‘Maths for Science’ (though I’m indebted to my co-author Pat Murphy who actually wrote this bit): ” … Continue reading
Distractors for multiple-choice questions
I’ve just been asked a question (well, actually three questions) about the summative use of multiple-choice questions. I don’t know the answer. Can anyone help? If we want 3 correct answers, what’s the recommended number of distractors? If we want 4 … Continue reading
Random guess scores
As an extension to my daughter Helen’s iCMA statistics project, random guess scores were calculated for multiple choice, multiple response and drag and drop questions in a number of different situations (e.g. with different numbers of attempts, different scoring algorithms, different … Continue reading
iCMA statistics
This work was originally reported on the website of COLMSCT (the Centre for the Open Learning of Mathematics, Science, Computing and Mathematics) – and other work was reported on the piCETL (the Physics Innovations Centre for Excellence in Teaching and … Continue reading
Posted in e-assessment, statistics, student engagement
Tagged iCMAs, statistics, student engagement
1 Comment
Overall impact of different variants of questions
You may be relieved to hear that this will be my final posting (at least for a while) on our use of different variants of interactive computer-marked assignment (iCMA) questions. We know that, whilst the different variants of many questions are … Continue reading
Posted in statistics, variants
Tagged CAA Conference, iCMAs, John Dermo, statistics, variants
2 Comments
Investigating whether variants of a question are of equivalent difficulty
We have devised a range of tools to determine whether or not the variants of a question are of equivalent difficulty.