White paper · 2026

Proportion and perceived standing in professional portraits

Dr. Imogen Ferris-Lowe, Benedict J. Ellerby and the 5iveHead Research Team · 5iveHead Technologies Ltd. · October 2026

Abstract. We examine the relationship between portrait proportion and the standing attributed to the subject by independent raters. Across 2,418,306 portraits and a rating panel of 11,200 adults, we find a strong, consistent association between 5iveHead Score and rated competence, trustworthiness and seniority (R² = 0.94). The association holds across all 41 professions studied. We discuss implications for identification, recruitment and professional presentation.

1. Introduction

Portraits shape first impressions. In recruitment, travel and professional networking, a single image is routinely used to make fast decisions about people. Despite this, there is little consensus on what makes a portrait effective. This paper introduces the 5iveHead Score, a composite measure of portrait proportion, and examines its relationship with how subjects are perceived.

2. Method

Portraits were collected from consenting 5iveHead users between 2025 and 2026 and scored before and after optimisation. A panel of 11,200 adult raters, recruited across eight countries, viewed randomised portraits for three seconds each and scored them on five-point scales for competence, trustworthiness and seniority. Raters were not told that portraits had been optimised.

Figure 1. Members of the research and standards teams at the 2025 calibration workshop.

3. Findings

Rated standing increased steadily with 5iveHead Score across the full range of the scale. The association was strongest between scores of 60 and 95, and plateaued only at the very top of the scale.

Figure 1. Mean rated standing by 5iveHead Score (n = 2,418,306). R² = 0.94.

4. Results by profession

Profession	Mean score before	After	Rated seniority change
Management consultants	74	97	+0.9
Secondary school teachers	61	91	+1.1
Software engineers	55	90	+1.3
Mattress salespeople	52	88	+1.4

Gains were largest among those with the lowest starting scores, suggesting that the effect is not limited to any one profession or seniority.

5. Limitations

Our sample is drawn from users who chose to optimise a portrait, and may not be representative of the wider population. Raters viewed portraits briefly and in isolation. We did not study the effect over time. Results may vary.

6. Conclusion

Portrait proportion is measurable and is strongly associated with perceived standing. We recommend that individuals and organisations treat portrait presentation as a matter of standards rather than chance.

References

Ferris-Lowe, I. & Ellerby, B. J. (2025). Portrait proportion and rater confidence. Journal of Applied Composition, 14(2), 88–104.
Pemberton, A. R. (2022). First impressions in identification documents: a review. Annals of Visual Standards, 9(1), 12–31.
Ellery-Hall, M. (2024). Defining a standard portrait. Proceedings of the Institute for Portrait Studies, 41, 5–19.
Okonkwo, T. & Lindqvist, S. (2023). Rater panels in applied perception research. Journal of Applied Composition, 12(4), 201–219.