Skip to main content
Thomas Vaughan-Johnston  PhD

Dr Thomas Vaughan-Johnston

(he/him)

PhD

Users
Available for postgraduate supervision

Teams and roles for Thomas Vaughan-Johnston

Overview

I study the psychology of persuasion with a special focus on vocal properties: how the emotions and confidence we project through our voice influence the effectiveness of communication. My research investigates when vocal cues like confidence or emotional tone help or hinder persuasion, exploring the complex interplay between how something is said and how it’s received.

A core thread of my work examines individual differences, especially how people’s motivation to maintain neutral, non-extreme attitudes shapes their responses to information and persuasive messages. Understanding this motivation reveals why some audiences resist polarization and how messages can be tailored for greater impact across diverse mindsets.

Additional lines of inquiry include:

  • When does projecting higher vocal confidence actually work against persuasion?

  • How does matching vocal affect (e.g., sounding sad) to message affect influence credibility and persuasion outcomes?

  • People’s beliefs about the causal importance of self-esteem (self-esteem importance) and how these beliefs affect behavior and receptivity to influence.

By integrating vocal communication, personality psychology, and lay beliefs about the self, my research provides actionable insights for crafting persuasive messages that resonate across varied audiences and contexts.

Publication

2025

2024

2023

Articles

Research

See my Scholar page for updated research materials.

Attitudes

Vocal dimensions and persuasion

Along with Drs. Fabrigar and Guyer, I have been investigating different aspects of the voice and their implications for attitude change. Specifically, different aspects of the voice such as vocal intonation (rising versus falling), speed (slow versus fast), and pitch (low versus high) have implications for attitude change, such as informing perceptions of the source's confidence.

Related Research Articles

Desired attitudes

People may view some attitudes as beliefs that they believe they ought or or would ideally hold ("desired attitudes"). However, the antecedents of these desired attitudes are less well understood, and many of the targets of these desires (e.g., a desire to hold generally neutral attitudes) remain under-examined. I am examining how we might (de)activate desired attitudes, using paradigms inspired by self-discrepancy, cognitive dissonance, and self-persuasion theories.

Related Research Articles

 

Self and Self-Regulation

Self-esteem Importance

How might beliefs about self-esteem influence how powerful of a role self-esteem actually plays in individuals' mental lives? Along with Dr. Jill Jacobson, I have developed a scale of self-esteem importance that measures beliefs about self-esteem. Self-esteem importance (i) affects how people react emotionally to gaining/losing self-esteem, (ii) orients individuals towards self-enhancing and self-protective behaviours, and (iii) shapes adolescents' and young adults' peer defending behaviors in bullying episodes.

Related Research Articles

Introversion/extroversion and self-esteem.

It is widely understood that extraverts have higher self-esteem than introverts, but less clearly established why this relationship exists. How might introverts and extraverts differ in their use of self-esteem maintenance tactics? We find that extraverts are not "generically" better at obtaining self-esteem from strategies, but specifically excel in gaining self-esteem from social comparisons, particularly because they see themselves as more similar to their peers (than do introverts), and similarity is a prerequisite for meaningful comparison.

Related Research Articles

 

Experiential avoidance.

Experiential avoidance measures such as the AAQ-2 and MEAQ have become popular in clinical and social-personality circles. Experiential avoidance is the attempt to suppress, avoid, or downplay 'internal experiences' such as emotions and uncomfortable thoughts; it has been widely understood as an individual difference. However, previous studies have shown its problematic overlap with more parsimonious constructs, and it is unclear whether it has sustainable incremental validity from mood and attachment measures. We are examining experiential avoidance's incremental validity in the context of stressful / emotionally provocative scenarios.

 

Related Research Articles

Teaching

Teaching

Present Teaching Roles

I serve as module coordinator and primary lecturer for core undergraduate courses, achieving consistently strong student feedback (e.g., 4.5/5 overall satisfaction for Thinking About Human Behaviour in 2024/25). My role includes designing assessments, delivering lectures, leading seminars, and providing pastoral support for this module.

I also presently deliver six "double lectures" in Social Psychology, covering prejudice/stereotyping, emotions, and conformity/obedience, all areas that align with my research expertise.

Beyond formal teaching, I regularly supervise undergraduate, master’s, and doctoral research, guiding students through every stage of the research process from conceptualisation to dissemination. Several of these projects have developed into publishable work.

Teaching Experiences

In previous roles, I have taught across the full undergraduate and postgraduate spectrum, with a particular focus on social and developmental psychology, behavioural science, and the application of psychological principles to real-world issues. This experience has included large introductory lectures, advanced specialist topics, and small-group tutorials, engaging students at every stage of their academic journey.

Undergraduate: Introductory psychology, developmental and social psychology, advanced topics in social psychology, and conceptual issues in behavioural science.

Postgraduate: Advanced topics in behavioural science, and power and influence in social contexts.

I have also co-coordinated large modules, contributed to interdisciplinary teaching, and designed resources to support student learning, such as supplementary readings, quizzes, and interactive activities, often cited in student feedback as particularly valuable.

Across these courses, I combined clear explanation with interactive activities, such as collaborative discussions, structured debates, and technology-assisted engagement, encouraging students to think critically and apply concepts beyond the classroom.

Academic Affiliations Involving Teaching Roles

  • Cardiff University – Lecturer (Assistant Professor) in Social Psychology (2023–present)

  • Durham University – Lecturer (Assistant Professor) in Social Psychology (2021–2023)

  • Queen’s University, Canada – Graduate Instructor and Teaching Assistant (2014–2021)

Relevant Training and Expertise

My teaching draws on a decade of experience in higher education across the UK and Canada, supported by formal pedagogical training and extensive public speaking experience. I bring to the classroom:

  • Expertise in social and personality psychology, persuasion, attitudes, and communication.

  • Experience designing and evaluating inclusive learning environments.

  • Teaching innovation including creative exercises, incorporating quizzes into lectures, and other novelties I will be trialing in the 25/26 academic year.
  • Engagement with wider educational practice, including invited workshops on authentic listening and teaching oracy.

Student Feedback and Approach

Student feedback consistently highlights my clarity, organisation, approachability, and enthusiasm. Comments frequently note my efforts to provide accessible learning materials, adapt to diverse needs, and create an inclusive classroom environment. I see teaching not just as the transfer of knowledge, but as the fostering of curiosity, independence, and critical thinking: qualities that prepare students for both academic and professional success.

Biography

  • Cardiff University – Lecturer (Assistant Professor) in Social Psychology (2023–present)
  • Durham University – Lecturer (Assistant Professor) in Social Psychology (2021–2023)

  • Queen’s University, Canada – Graduate Instructor and Teaching Assistant (2014–2021)

Honours and awards

  • 2025 | Small Research Grant (co-investigator) | BA/Leverhulme. £10,000
    “The two faces of ambivalence: Unmasking cross-cultural differences in social perceptions of dispositional attitudinal ambivalence." PI: Prof. Geoff Haddock.

  • 2023-2025 | Research Accelerator Award (co-investigator) | Durham University | £10,000, awarded twice.
    “Shy bairns get nowt: Articulacy, the curriculum, and beyond: an interdisciplinary collaboration on empowering communication.” PI: Prof. Arlene Holmes Henderson.

  • 2018-2021 |  SSHRC CGS-Doctoral | Social Sciences & Humanities Research Council | £22,000 x 3 years

  • 2017-2018 |  Ontario Graduate Scholarship | Ontario Provincial Government | £6,000 x 1 year  
  • 2015-2026 |  SSHRC CGS-Masters | Social Sciences & Humanities Research Council | £6,000 x 1 year 

Supervisions

  • Persuasion, especially involving properties of the voice, and the role of individual differences (e.g., how people's lay beliefs, personality, social identities, affect responses to persuasion).

  • Self-enhancement and self-esteem.

  • Methods, such as how replication success is shaped by methodological choices made by original and replication researchers.

Current supervision

Benedict Holden

Benedict Holden

Contact Details

Email Vaughan-JohnstonT@cardiff.ac.uk

Campuses Tower Building, Room 10.12, 70 Park Place, Cardiff, CF10 3AT

Research themes

Specialisms

  • Public Attitudes
  • Self
  • Personality and individual differences
  • Social and personality psychology

External profiles