'non-behavioural' originates from the prefix 'non-' meaning 'not' and the word 'behavioural' which is derived from 'behaviour', originating from Old French 'behaviour', meaning 'conduct'.

'behaviour' changed from the Old French word 'behaviour' and eventually became the modern English word 'behaviour'.

Initially, it meant 'conduct or manner', but over time it evolved into its current meaning of 'the way in which one acts or conducts oneself'.