Declan Devlin, PhD

About me

I am a cognitive scientist interested in how people process numerical information and develop mathematical skills.

My early work focused on understanding which skills comprise the construct of “early numeracy”, and which of these skills are most relevant to later mathematical achievement or the risk of developing mathematical learning difficulties. My PhD project focused on understanding how people process numerical order, with a particular interest in the role of familiarity and memory retrieval, and how these skills may contribute to arithmetic proficiency.

My current postdoctoral project focuses on the cognitive processes underlying non-symbolic quantity estimation. Alongside this, I am interested in understanding the nature of order processing deficits in developmental dyscalculia, and various other things!

Are these numbers in order?

2   4   6

How many dots are there?

Background

I completed my BSc in Psychology at the University of Sheffield (2017–2020). I then completed my PhD in Mathematical Cognition at Loughborough University (2020–2023).

Since then, I have held research positions at the Centre for Early Mathematics Learning at Loughborough University (2023–2024), and the Centre for Pain Research at the University of Bath (2025). I currently work as a Postdoctoral Research Fellow in Mathematical Cognition at the Norwegian University of Science and Technology (NTNU).

  1. University of Sheffield2017–2020

    BSc

    Psychology

  2. Loughborough University2020–2023

    PhD

    Mathematical cognition

  3. Centre for Early Mathematics Learning2023–2024

    Postdoc

    Centre for Early Mathematics Learning

  4. University of Bath2025

    Postdoc

    Centre for Pain Research

  5. NTNU2026–present

    Postdoc

    Mathematical cognition

Recent highlights

Latest preprint ·

People remember dot patterns during numerosity estimation tasks

Declan Devlin, Eivind Kaspersen & Trygve Solstad

When we estimate how many dots we see, do we also remember their arrangement? We found that people recognise dot patterns they previously estimated—even when they were not asked to remember them.

First page of the dot memory preprint
First page of the Sella et al. journal article

Latest journal article ·

The role of verbal working memory load on number order processing: Evidence from an articulatory suppression paradigm

Francesco Sella, Declan Devlin, Natalia Dubinkina, Iro Xenidou-Dervou, Bert Reynvoet & Korbinian Moeller

Acta Psychologica

How do we decide whether numbers are in order? We asked people to judge number sequences while repeating syllables aloud. This slowed their responses, especially for consecutive sequences, suggesting that verbal working memory supports routines such as counting internally.