Joanna Williamson

Joanna Williamson

Jo Williamson

My background is in maths, and I completed an MMaths at the University of Oxford and a PhD in Mathematics Education at the University of Southampton. My doctoral research looked at numerical development in five year olds, specifically, changes in their representations of natural number structures. Before joining Cambridge University Press and Assessment in 2015, I worked on statistical research in other areas of education and in healthcare.

I’m part of the Educational Measurement team, and the projects I work on involve statistical and psychometric analyses of assessment data, including the National Pupil Database. In recent projects, I’ve been looking at the impact of GCSE and A Level reform, applications of cognitive diagnostic modelling, and students’ progression from Key Stage 4 to post-16 education and training.

Outside of work I spend my time rowing, running and cycling.

Publications

2023

Cognitive Diagnostic Models and how they can be useful
Williamson, J. 2023. Cognitive Diagnostic Models and how they can be useful. Cambridge University Press & Assessment.
Performance in GCSE Mathematics topics pre- and post-reform
Williamson, J. and Vidal Rodeiro, C. (2023). Performance in GCSE Mathematics topics pre- and post-reform. In T. Fujita (Ed.), Proceedings of the British Society for Research into Learning Mathematics 43(2) June 2023.
Performance in secondary mathematics pre- and post-GCSE reform

Williamson, J., & Vidal Rodeiro, C. L. (2023, November 1–4). Performance in secondary mathematics topics pre- and post-reform. [Paper presentation]. Annual conference of the Association for Educational Assessment – Europe (AEA-Europe), Malta. https://2023.aea-europe.net/ 

Evaluating the impact of curriculum and assessment reform in secondary education on progression to mathematics post-16

Vidal Rodeiro, C. L., & Williamson, J. (2023, November 1–4). Evaluating the impact of curriculum and assessment reform in secondary education on progression to mathematics post-16. [Paper presentation]. Annual conference of the Association for Educational Assessment (AEA-Europe), Malta. https://2023.aea-europe.net/

Tracking the “June 2020 cohort”: did the cancellation of exams in England hinder progression to post-16 study?
Vidal Rodeiro, C.L., & Williamson, J. (2023, 12–14 September). Tracking the “June 2020 cohort”: did the cancellation of exams in England hinder progression to post-16 study? [Paper presentation]. Annual Conference of the British Educational Research Association (BERA), Aston University, UK. BERA Conference 2023 | BERA
The impact of curriculum and assessment reform in secondary education on progression to mathematics post-16
Williamson, J., & Vidal Rodeiro, C. L. (2023, 22–25 August). The impact of curriculum and assessment reform in secondary education on progression to mathematics post-16 [Paper presentation]. European Conference on Educational Research 2023, Glasgow, Scotland.
The impact of GCSE maths reform on progression to mathematics post-16

Vidal Rodeiro, C., & Williamson, J. (2023). The impact of GCSE Maths reform on progression to mathematics post-16 Research Matters: A Cambridge University Press & Assessment publication, 36, 25-45. https://doi.org/10.17863/CAM.101743

In England, GCSE (General Certificate of Secondary Education) qualifications offered to students aged 14–16 were recently reformed. For mathematics specifically, the new GCSE aimed to be more demanding, provide greater challenge for the most able students, and support progression to post-16 mathematics. However, there have been concerns that the new GCSE could deter students from further education in the subject and, to date, there has been little research on its impact on participation in and learning of mathematics post-16.

This research compared progression to and performance in post-16 mathematics pre- and post-GCSE reform and found that, contrary to fears about reduced uptake, progression generally increased following the reform. In particular, the increase was higher among those who achieved top grades in their mathematics GCSE than for students with just a pass. Performance in post-16 mathematics was, in contrast to teacher expectations, lower post-reform.

Research Matters 36: Autumn 2023
  • Foreword Tim Oates
  • Editorial Tom Bramley
  • The prevalence and relevance of Natural History assessments in the school curriculum, 1858–2000: a study of the Assessment ArchivesGillian Cooke
  • The impact of GCSE maths reform on progression to mathematics post-16Carmen Vidal Rodeiro, Joanna Williamson
  • An example of redeveloping checklists to support assessors who check draft exam papers for errorsSylvia Vitello, Victoria Crisp, Jo Ireland
  • An analysis of the relationship between Secondary Checkpoint and IGCSE resultsTim Gill
  • Synchronous hybrid teaching: how easy is it for schools to implement?Filio Constantinou
  • Research NewsLisa Bowett
The feasibility of on-screen mocks in maths and science
Williamson, J. (2023). The feasibility of on-screen mocks in maths and science. Cambridge University Press & Assessment.

2022

What’s in a name? Are surnames derived from trades and occupations associated with lower GCSE scores?

Williamson, J., & Bramley, T. (2022). What’s in a name? Are surnames derived from trades and occupations associated with lower GCSE scores? Research Matters: A Cambridge University Press & Assessment publication, 34, 76–97.

In England, there are persistent associations between measures of socio-economic advantage and educational outcomes. Research on the history of names, meanwhile, confirms that surnames in England – like many other countries – were highly socially stratified in their origins. These facts prompted us to wonder whether educational outcomes in England might show variation by surname origin, and specifically, whether surnames with an occupational origin might be associated with slightly lower average GCSE scores than surnames of other origins. Even though surnames do not measure an individual’s socio-economic position, our hypothesis was that in aggregate, the educational outcomes of a group defined in this way might still reflect past social history.

In line with the research hypothesis, the results showed that the mean GCSE scores of candidates with occupational surnames were slightly lower than the mean GCSE scores of candidates with other surnames. The difference in attainment was a similar size to the difference expected between candidates half a year apart in age, and much smaller than the “gap” between male and female candidates. The explanation for the identified effect was beyond the scope of the current research, but surname effect mechanisms proposed in the literature include the psychological (e.g., implicit egotism), sociological and socio-genetic.

Which assessment is harder? Some limits of statistical linking.

Benton, T., & Williamson, J. (2022). Which assessment is harder? Some limits of statistical linking. Research Matters: A Cambridge University Press & Assessment publication, 34, 26–41.

Equating methods are designed to adjust between alternate versions of assessments targeting the same content at the same level, with the aim that scores from the different versions can be used interchangeably. The statistical processes used in equating have, however, been extended to statistically “link” assessments that differ, such as assessments of the same qualification type that assess different subjects. Despite careful debate on statistical linking in the literature, it can be tempting to apply equating methods and conclude that they have provided a definitive answer on whether a qualification is harder or easier than others.

This article offers a novel demonstration of some limits of statistical equating by exploring how accurately various equating methods were able to equate between identical assessments. To do this, we made use of pairs of live assessments that are “cover sheet” versions of each other, that is, identical assessments with different assessment codes. The results showed that equating errors with real-world impact (e.g., an increase of 5–10 per cent in the proportion of students achieving a grade A) occurred even where equating conditions were apparently favourable. No single method consistently produced more accurate results than the others.

The results emphasise the importance of considering multiple sources of information to make final grade boundary decisions. More broadly, the results are a reminder that if applied uncritically, equating methods can lead to incorrect conclusions about the relative difficulty of assessments.

Research Matters 34: Autumn 2022
  • Foreword Tim Oates
  • Editorial Tom Bramley
  • Learning loss in the Covid-19 pandemic: teachers’ views on the nature and extent of loss Matthew Carroll, Filio Constantinou
  • Which assessment is harder? Some limits of statistical linking Tom Benton, Joanna Williamson
  • Progress in the first year at school Chris Jellis
  • What are "recovery curricula" and what do they include? A literature review Martin Johnson
  • What's in a name? Are surnames derived from trades and occupations associated with lower GCSE scores? Joanna Williamson, Tom Bramley
  • Research News Lisa Bowett
The impact of GCSE maths reform on progression to A level.
Vidal Rodeiro, C.L. & Williamson, J. (2022). The impact of GCSE maths reform on progression to A level. Cambridge University Press & Assessment.
Understanding post-16 subject choices: an empirical study into the role of student rank order.
Williamson, J. & Vidal Rodeiro, C. (2022, June 23). Understanding post-16 subject choices: an empirical study into the role of student rank order. [Paper presentation]. Annual conference of the British Education Studies Association, Manchester.
Mark scheme design for school- and college-based assessment in VTQs
Williamson, J. and Child, S. (2022). Mark scheme design for school- and college-based assessment in VTQs. Journal of Vocational Education and Training 74 (3), 454-474.
Student rank order and post-16 subject choices
Williamson, J. & Vidal Rodeiro, C. (2022). Student rank order and post-16 subject choices. Cambridge University Press & Assessment.
Research Matters 33: Spring 2022
  • Foreword Tim Oates
  • Editorial Tom Bramley
  • A summary of OCR’s pilots of the use of Comparative Judgement in setting grade boundaries Tom Benton, Tim Gill, Sarah Hughes, Tony Leech
  • How do judges in Comparative Judgement exercises make their judgements? Tony Leech, Lucy Chambers
  • Judges' views on pairwise Comparative Judgement and Rank Ordering as alternatives to analytical essay marking Emma Walland
  • The concurrent validity of Comparative Judgement outcomes compared with marks Tim Gill
  • How are standard-maintaining activities based on Comparative Judgement affected by mismarking in the script evidence? Joanna Williamson
  • Moderation of non-exam assessments: is Comparative Judgement a practical alternative? Carmen Vidal Rodeiro, Lucy Chambers
  • Research News Lisa Bowett
How are standard-maintaining activities based on Comparative Judgement affected by mismarking in the script evidence?

Williamson, J. (2022). How are standard-maintaining activities based on Comparative Judgement affected by mismarking in the script evidence? Research Matters: A Cambridge University Press & Assessment publication, 33, 80–99.

An important application of Comparative Judgement (CJ) methods is to assist in the maintenance of standards from one series to another in high stakes qualifications, by informing decisions about where to place grade boundaries or cut scores. This article explores the extent to which standard-maintaining activities based on Comparative Judgement would be robust to mismarking in the sample of scripts used for the comparison exercise. While extreme marking errors are unlikely, we know that mismarking can occur in live assessments, and quality of marking can vary. This research investigates how this could affect the outcomes of CJ-based methods, and therefore contributes to better understanding of the risks associated with using CJ-based methods for standard maintaining. The article focuses on the ‘simplified pairs’ method (Benton et al., 2020), an example of the ‘universal method’ discussed by Benton (this issue).

Tracking the June 2020 Key Stage 4 cohort: progression to post-16 study
Vidal Rodeiro, C.L. & Williamson, J. (2022). Tracking the June 2020 Key Stage 4 cohort: progression to post-16 study. Cambridge University Press & Assessment.

2021

How well do we understand wellbeing? Teachers’ experiences in an extraordinary educational era

Jellis, C., Suto, I., Williamson, J. (2021). How well do we understand wellbeing? Teachers’ experiences in an extraordinary educational era. Research Matters: A Cambridge University Press & Assessment publication, 32, 45-66.

COVID-19 has had a huge effect on education. While there has been much interest in the effects of school closures on children, less attention has focused on teachers’ wellbeing. This article describes a small-scale study in which we explored teachers’ experiences and concerns during and after England’s second national school closure in early 2021. Our aim was to improve understanding of how teachers had been impacted in these unprecedented times. 54 teachers in England completed an online survey which was based on a well-established scale of teacher wellbeing. The survey also asked about what would improve teachers’ wellbeing.

Levels of organisational and student interaction wellbeing were reported to be positive both during and after lockdown, but slightly higher after lockdown. By contrast, reported workload wellbeing was slightly negative overall, and slightly lower after lockdown. Strikingly, the issues that most affected teacher wellbeing were not especially connected to lockdown. Teachers were most concerned about the time available to do their jobs and the amount of administration expected of them. Interestingly, some of the longest-serving teachers were amongst those finding that time pressure and administration affected their wellbeing. We conclude that teachers’ longer-term working conditions impacted their wellbeing far more than teaching through lockdown did. Ensuring wellbeing needs are met in “normal” times may help increase resilience when novel challenges arise.

Learning during lockdown: How socially interactive were secondary school students in England?

Williamson, J., Suto, I., Little, J., Jellis, C., & Carroll, M. (2021) Learning during lockdown: How socially interactive were secondary school students in England? Research Matters: A Cambridge University Press & Assessment publication, 32, 22-44.

For countless students, national lockdowns in 2020 and 2021 caused serious upheaval in their education. Across England, decisions to close schools engendered much anxiety, as did Government expectations that most students continued their schooling from home. In addition to lost opportunities for learning and even loss of learning, students’ wellbeing was a significant concern for parents, teachers, and other stakeholders.

Students’ social interactions with their teachers, each other, family and friends are critical to both pedagogy and wellbeing. We report on a survey of over 600 secondary school students’ perceptions of the extent and nature of such interactions during England’s national lockdown in early 2021. We found that the activity types that occurred both within and outside of lockdown schooling changed markedly compared with during pre-pandemic schooling. Students reported spending less time interacting with their teachers and peers though whole class work, small group work, and pair work, and more time working independently. Over half of the students surveyed perceived working independently to be helpful or really helpful, apparently valuing the autonomy they had gained. Patterns of activity types for students who learned mostly or entirely at home were strikingly like those of students who continued to attend school during lockdown; the nature of face-to-face schooling appeared to have changed temporarily in the direction of remote schooling.

Research Matters 32: Autumn 2021
  • Foreword Tim Oates
  • Editorial Tom Bramley
  • Learning during lockdown: How socially interactive were secondary school students in England? Joanna Williamson, Irenka Suto, John Little, Chris Jellis, Matthew Carroll
  • How well do we understand wellbeing? Teachers’ experiences in an extraordinary educational era Chris Jellis, Joanna Williamson, Irenka Suto
  • What do we mean by question paper error? An analysis of criteria and working definitions Nicky Rushton, Sylvia Vitello, Irenka Suto
  • Item response theory, computer adaptive testing and the risk of self-deception Tom Benton
  • Research News Anouk Peigne
On reducing errors in assessment instruments
Suto, I., Williamson, J., Ireland, J., and Macinska, S. (2021). On reducing errors in assessment instruments. Research Papers in Education (ahead of print).

2019

How can mark scheme design support reliable and valid school-based assessment?
Williamson, J., and Child, S. (2019). How can mark scheme design support reliable and valid school-based assessment? Presented at the European Conference of Educational Research, Hamburg, Germany, 2-6 September 2019.
Moderating artwork: Investigating judgements and cognitive processes

Chambers, L., Williamson, J. and Child, S. (2019). Moderating artwork: Investigating judgements and cognitive processes.  Research Matters: A Cambridge Assessment publication, 27, 19-25.

In this article, we explore the cognitive process and resources drawn upon when moderating artwork. The cognitive processes involved in the external moderation of non-exam assessments has received little attention; the few research studies that exist investigated moderation where the candidates’ submissions were in mostly written form. No studies were found which explicitly looked at a non-written submission, such as artwork. In this small- scale study, participating moderators were asked to “think aloud” whilst moderating candidates’ Art and Design submissions. An analysis of the resulting verbal protocol and observational data enabled timelines of moderator activity to be produced. From these, a process map containing moderation stages, activities, cognitive processes, and resource use was developed.

Moderating artwork - investigating judgements and cognitive processes
Chambers, L., Williamson, J. and Child, S. (2019). Moderating artwork - investigating judgements and cognitive processes.  Presented at the annual MAXQDA conference, Berlin, Germany, 27 February - 1 March 2019.

2018

AS level trends 2018
Williamson, J. and Vitello, S. (2018). Cambridge Assessment Research Report. Cambridge, UK: Cambridge Assessment.
Vocational, technical and applied qualifications within upper secondary education in England
Williamson, J. and Carroll, M. (2018). Vocational, technical and applied qualifications within upper secondary education in England: Who takes them, how do they fit within students' programmes of study, and where do students progress to next? Presented at the 19th annual AEA-Europe conference, Arnhem/Nijmegen, The Netherlands, 7-10 November 2018.
Characteristics, uses and rationales of mark-based and grade-based assessment

Williamson, J. (2018). Characteristics, uses and rationales of mark-based and grade-based assessment. Research Matters: A Cambridge Assessment publication, 26, 15-21.

Mark-based assessment requires assessors to assign numerical marks to candidates’ work, assisted by a mark scheme. In grade-based approaches, assessors evaluate candidates’ work against grading criteria to decide upon a grade, avoiding marks altogether. This article outlines the characteristics, uses and rationales of the two approaches, focusing particularly on their suitability for assessment in vocational and technical qualifications.

Reformed A level results: Do candidates who take the AS level achieve better grades?
Williamson, J. and Vitello, S. (2018). Cambridge Assessment Research Report. Cambridge, UK: Cambridge Assessment.
Meaningful destinations: using national data to investigate how different education pathways support young people’s progression in England
Vidal Rodeiro, C. L. and Williamson, J. (2018). Meaningful destinations: using national data to investigate how different education pathways support young people’s progression in England. Research Papers in Education, 34(6), 725-748.
Effects of AS/A level reforms in England: extra insights from the National Pupil Database
Vitello, S. and Williamson, J. (2018). Effects of AS/A level reforms in England: extra insights from the National Pupil Database. Presented at the 44th conference of the International Association for Educational Assessment, Oxford, UK, 9-14 September 2018.
Examining the use of technical qualifications within Key Stage 5 programmes of study

Williamson, J. and Carroll, M. (2018). Examining the use of technical qualifications within Key Stage 5 programmes of study. Presented at the 5th International Conference on Employer Engagement in Education and Training, London, UK, 5-6 July 2018.

The conference proceedings can be viewed here.

AS level trends 2017

Vitello, S. and Williamson, J. (2018). Cambridge Assessment Research Report. Cambridge, UK: Cambridge Assessment.

2017

Internal versus external assessment in vocational qualifications: a commentary on the government’s reforms in England
Vitello, S. and Williamson, J. (2017). Internal versus external assessment in vocational qualifications: a commentary on the government’s reforms in England.  London Review of Education, 15(3), 536-548.
Education and employment destinations of students in England: the value of 14-19 qualifications
Vidal Rodeiro, C.L. and Williamson, J. (2017). Presented at the British Educational Research Association conference, University of Sussex, Brighton, UK, 5-7 September 2017.
“Meaningful” destinations: using national data to compare progression to higher education, employment and training from different education pathways in England

Vidal Rodeiro, C.L. and Williamson, J. (2017). Presented at the European Conference of Educational Research, Copenhagen, Denmark, 22-25 August 2017.

Learning aims: A preliminary exploration to monitor A/AS level reform
Zanini, N. and Williamson, J. (2017). Cambridge Assessment Research Report.  Cambridge, UK: Cambridge Assessment.

2016

Statistical moderation of school-based assessment in GCSEs

Williamson, J. (2016). Statistical moderation of school-based assessment in GCSEs. Research Matters: A Cambridge Assessment publication, 22, 30-36.

Moderation of school-based assessment (SBA), such as coursework, is required in order to ensure the comparability of marks across different centres. Under current procedures for GCSEs, moderators re-mark a sample of SBA from each centre in order to check whether any adjustment should be made to that centre’s marks. This article explores statistical moderation, an alternative form of moderation that calibrates SBA marks on the basis of a statistical relationship with another assessment, such as an exam component. The article outlines methods of statistical moderation that are used in jurisdictions around the world, and explores the effect of applying these methods to results data from three GCSEs. The analysis focuses on comparing the statistically moderated results to operational results (moderated under existing, non-statistical procedures) in terms of marks, grades, and the rank-order of candidates and centres.

Uptake of GCE A level subjects 2015
Gill, T. & Williamson, J. (2016) Statistics Report Series No.109
Uptake of GCE A level subjects 2015 - Data
Gill, T. & Williamson, J. (2016) Statistics Report Series No.109 - Data
Provision of GCE A level subjects 2015
Gill, T. & Williamson, J. (2016) Statistics Report Series No. 108
Provision of GCE A level subjects 2015
Gill, T. & Williamson, J. (2016) Statistics Report Series No. 108 - Data
Uptake of GCSE subjects 2015
Gill, T. & Williamson, J. (2016) Statistics Report Series No.107
Provision of GCSE subjects 2015
Gill, T. & Williamson, J. (2016) Statistics Report Series No. 106
Uptake of GCSE subjects 2015 - Data
Gill, T. & Williamson, J. (2016) Statistics Report Series No.107 - Data
Provision of GCSE subjects 2015 - Data
Gill, T. & Williamson, J. (2016) Statistics Report Series No. 106 - Data

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