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Testing for over- and under-dispersion in physics degree outcomes
written by Astra Sword
As the scale of quantitative data available to physics education researchers grows, it is imperative that we critically assess how well the assumptions behind "standard" statistical methods apply in our field. In the present work, I give a background on a common statistical assumption used to analyse proportion data, the binomial assumption; I discuss scenarios in which this assumption may break down in the context of education research; and test this assumption using a large population-level data set. This data set comprises academic outcomes (rate of 'good degrees') for all undergraduate physics degree programs that ran in the UK across the 2012/13--2018/19 period (26,960 students across 79 programs). I estimate dispersion parameters and their significance for each program in the data set and discuss the implications of the results for analysing proportion data in physics education research.
Physics Education Research Conference 2023
Part of the PER Conference series
Sacramento, CA: July 19-20, 2023
Pages 356-361
Subjects Levels Resource Types
Education Foundations
- Research Design & Methodology
= Evaluation
= Statistics
Education Practices
- Careers
- Graduate/Professional
- Reference Material
= Research study
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Mirror:
https://doi.org/10.1119/perc.2023…
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Free access
License:
This material is released under a Creative Commons Attribution 4.0 license. Further distribution of this work must maintain attribution to the published article's author(s), title, proceedings citation, and DOI.
Rights Holder:
American Association of Physics Teachers
DOI:
10.1119/perc.2023.pr.Sword
Keyword:
PERC 2023
Record Creator:
Metadata instance created September 20, 2023 by Lyle Barbato
Record Updated:
September 27, 2023 by Lyle Barbato
Last Update
when Cataloged:
October 15, 2023
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Record Link
AIP Format
A. Sword, , presented at the Physics Education Research Conference 2023, Sacramento, CA, 2023, WWW Document, (https://www.compadre.org/Repository/document/ServeFile.cfm?ID=16609&DocID=5789).
AJP/PRST-PER
A. Sword, Testing for over- and under-dispersion in physics degree outcomes, presented at the Physics Education Research Conference 2023, Sacramento, CA, 2023, <https://www.compadre.org/Repository/document/ServeFile.cfm?ID=16609&DocID=5789>.
APA Format
Sword, A. (2023, July 19-20). Testing for over- and under-dispersion in physics degree outcomes. Paper presented at Physics Education Research Conference 2023, Sacramento, CA. Retrieved April 16, 2024, from https://www.compadre.org/Repository/document/ServeFile.cfm?ID=16609&DocID=5789
Chicago Format
Sword, Astra. "Testing for over- and under-dispersion in physics degree outcomes." Paper presented at the Physics Education Research Conference 2023, Sacramento, CA, July 19-20, 2023. https://www.compadre.org/Repository/document/ServeFile.cfm?ID=16609&DocID=5789 (accessed 16 April 2024).
MLA Format
Sword, Astra. "Testing for over- and under-dispersion in physics degree outcomes." Physics Education Research Conference 2023. Sacramento, CA: 2023. 356-361 of PER Conference. 16 Apr. 2024 <https://www.compadre.org/Repository/document/ServeFile.cfm?ID=16609&DocID=5789>.
BibTeX Export Format
@inproceedings{ Author = "Astra Sword", Title = {Testing for over- and under-dispersion in physics degree outcomes}, BookTitle = {Physics Education Research Conference 2023}, Pages = {356-361}, Address = {Sacramento, CA}, Series = {PER Conference}, Month = {July 19-20}, Year = {2023} }
Refer Export Format

%A Astra Sword %T Testing for over- and under-dispersion in physics degree outcomes %S PER Conference %D July 19-20 2023 %P 356-361 %C Sacramento, CA %U https://www.compadre.org/Repository/document/ServeFile.cfm?ID=16609&DocID=5789 %O Physics Education Research Conference 2023 %O July 19-20 %O application/pdf

EndNote Export Format

%0 Conference Proceedings %A Sword, Astra %D July 19-20 2023 %T Testing for over- and under-dispersion in physics degree outcomes %B Physics Education Research Conference 2023 %C Sacramento, CA %P 356-361 %S PER Conference %8 July 19-20 %U https://www.compadre.org/Repository/document/ServeFile.cfm?ID=16609&DocID=5789


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