Most people have a comfortable tolerance for information received via their sense organs (i.e., sounds, tastes, smells etc.) while others have SENSORY SENSITIVITIES (i.e., over-reactivity, such as when sounds feel too loud) or SENSORY AVERSIONS (negative emotional responses, e.g., when sounds trigger anger, e.g., to the sound of chewing). Our prior proposal (approved and ongoing) investigates AUDITORY sensitivities (hyperacusis and misophonia; where sounds cause pain, or distress/anger respectively). However, sound-difficulties are just one branch of a broader profile which can affect multiple senses, and cause considerable negative impact in day to day life. For example, broad sensory sensitivities play a significant role in anxiety disorder (sometimes via neurodevelopmental conditions such as autism). With poor well-being and anxiety placing substantial financial burden on society (e.g., £12 billion invested annually by the NHS), our study aims to better understand sensory sensitivities and aversions with a questionnaire that identifies those ALSPAC participants who have such difficulties across multiple senses. The wealth of ALSPAC back-data will then allow us to “reach back” into their childhood, to explore their early development in terms of wellbeing, mental health, mood and feelings (DAWBA, Strengths and difficulties, mood and feelings, PANAS, Locus of control, anxiety) as well as their cognitive skills (eg., attention tasks), and schooling attainment (school key stage linked data). We predict that adults with sensory sensitivities/aversions were likely already expressing poorer mental well-being at a younger age, and may have heightened scores on tasks such as attention-to-detail and obsessive control, and potentially lower scores on school attendance and attainment.