References - Sensory Regulation and Environmental Control

Sensory overload in Virtual Reality (VR) is an intense state of psychological and physiological overwhelm that occurs when the brain is unable to process a surplus of immersive sensory inputs. In VR, this is primarily driven by excessive visual and auditory stimulation, such as high-contrast flashing lights, complex 3D graphics, and loud or sudden spatialised soundscapes. For neurodivergent individuals - particularly those with Autism Spectrum Disorder (ASD) or ADHD - the threshold for this overload is often much lower because their sensory processing systems may perceive stimuli with greater intensity or struggle to filter out irrelevant background noise (Newbutt et al., 2016; Wang et al., 2020).

The experience of sensory overload can manifest through both physical symptoms, such as increased heart rate, dizziness, and nausea, and behavioral responses, including emotional meltdowns or a complete cognitive "shutdown" where functions like speech and decision-making are temporarily disabled (Sadia, 2020; Openality, 2025a). In educational and therapeutic settings, specific triggers in VR have been identified, such as "reward noises," cluttered user interfaces, and the "sensory shock" that can occur during environmental transitions or the removal of a headset (Baker, 2025; Openality, 2025b). Effective VR design must therefore prioritise customisation and sensory control, allowing adjustment of intensity of light, sound, and motion to match the individual profile of each user (Wang et al., 2020).

Sensory Regulation & Environmental Control

Colour and Cognitive Load

This paper discusses the impact of colour-coding on user efficiency and cognitive load, specifically highlighting the risks of over-reliance on colour for critical information.

Heilemann, F et al. (2021) conducted a comprehensive analysis of accessibility guidelines for VR games, synthesizing data from various sources to evaluate the effectiveness of colour as a signifier in virtual environments. The research included user testing with participants who have Colour Vision Deficiency (CVD) and those with typical colour vision, assessing reaction times, error rates, and overall task performance in scenarios where colour was the primary cue.

Key takeaways from this research:

Performance Degradation: Users with Colour Vision Deficiency (CVD) experience significantly slower reaction times and higher error rates when colour is the only signifier of a state or object (e.g., "Shoot the red targets, avoid the green ones").
Cognitive Load: Even for users with typical colour vision, distinguishing between subtle colour variations (e.g., yellow vs. orange) in a complex VR environment increases cognitive load compared to using shape or icon-based cues.
Redundancy Principle: The paper strongly supports the "Multimodal Consistency" or "Redundant Coding" principle, arguing that performance improves for all users when colour is paired with a secondary cue (e.g., Red + X shape vs. Green + Circle shape).
Validates "Multimodal Consistency" behaviour and the "Subtractive Perception" concepts by proving that relying solely on colour is a functional barrier, not just an aesthetic choice.

Heilemann, F., Zimmermann, G. and Münster, P., 2021. Accessibility guidelines for VR games-A comparison and synthesis of a comprehensive set. Frontiers in Virtual Reality, 2, p.697504.

Xia, G. et al. (2022) conducted a comparative study on the effects of colour on cognitive performance in both real-world and VR environments. The research involved controlled experiments where participants were exposed to different coloured environments while performing various cognitive tasks, such as logical reasoning, creativity tests, and memory recall.

Colour Significantly Impacts Cognition: It confirms that specific colours trigger distinct cognitive states in VR, mirroring real-world psychology. For example, Red environments were found to improve performance on logical and detail-oriented tasks, while Blue environments enhanced lateral thinking and creativity.
VR Replicates Real-World Psychology: It concludes that the psychological impact of colour in VR is "approximately identical" to the physical world. This validates the need for Granular Environmental Control in your framework—users need to be able to adjust the environment not just for comfort, but because the wrong colour palette could actively hinder the specific type of thinking required for the gameplay task.
Engagement & Immersion: It argues that a "considered approach to colour design" is not just aesthetic but functional, directly improving user engagement and task efficiency.

Xia, G., Henry, P., Li, M., Queiroz, F., Westland, S. and Yu, L. (2022) 'A Comparative Study of Colour Effects on Cognitive Performance in Real-World and VR Environments', Brain Sciences, 12(1), Art. 31. Available at: https://www.mdpi.com/2076-3425/12/1/31 (Accessed: 16 February 2026).

Baker, C. (2025). Openality Primary Research Interview: Science and Technology Lead. [Internal Document].
Gerling, K., Hicks, K., Kalyn, M., Evans, A. and Linehan, C. (2020). ‘The Body as a Barrier: Understanding the Physical Demands of Virtual Reality’. Proceedings of the 2020 CHI Conference on Human Factors in Computing Systems.
Newbutt, N., Sung, C., Kuo, H. J. and Leahy, M. J. (2016). ‘The potential of virtual reality technology in supporting people with autism’. Journal of Intellectual Disability Research.
Openality (2025a). Identified Barriers to VR Access: Sensory and Cognitive Synthesis. [Internal Project Report].
Openality (2025b). App Testing: General Conclusions. [Internal Project Report].
Sadia, S. (2020). ‘Sensory Overload and the Brain’. Cited in: Two sides of the same coin: accessibility practices and neurodivergent users experience of extended reality (2024). University College London.
Wang, M., Reid, D. and Stephens, L. (2020). ‘Virtual Reality as a Tool for Teaching Children with Special Needs’. Journal of Special Education Technology.

Stochastic Resonance

The recommendation for toggleable auditory masking (e.g., white, pink, or brown noise) is supported by a synthesis of neurobiological theory and inclusive design research. Moss et al. (2004) establish that controlled auditory ‘noise’ can paradoxically enhance signal detection via stochastic resonance, effectively improving focus for learners with specific sensory profiles by helping the brain ‘tune in’ to primary educational content.

This is balanced by the findings of Collins et al. (2024) and Dudley et al. (2023), who argue that providing users with environmental customization - such as noise-masking layers - is essential for self-regulation and the prevention of sensory overload. By allowing staff to adjust the auditory threshold to reach an "optimal" level of stimulation, the framework addresses the standardised interaction paradigm that typically excludes those with sensitive processing needs. This feature transforms the VR soundscape from a potential barrier into a customizable tool for cognitive stability and sustained engagement.

Collins, J., Ko, W., Shende, T., Lin, S. and Jiang, L. (2024). ‘Exploring the accessibility of social virtual reality for people with ADHD and autism’. Proceedings of the 26th International ACM SIGACCESS Conference on Computers and Accessibility.
Dudley, J., Yin, L., Garaj, V. and Kristensson, P.O. (2023). ‘Inclusive Immersion: a review of efforts to improve accessibility in virtual reality, augmented reality and the metaverse’. Virtual Reality, 27(4), pp. 2989-3020.
Moss, F., Ward, L. M. and Sannita, W. G. (2004). ‘Stochastic resonance and sensory information processing: A tutorial and review of application’. Clinical Neurophysiology, 115(2), pp. 267–281.