Learn how to say Behaviourist correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word behaviour:
the way in which one acts or conducts oneself, especially towards others:
he will vouch for her good behaviour
his insulting behaviour towards me
management is a set of techniques and behaviours for getting things done
the way in which an animal or person behaves in response to a particular situation or stimulus:
the feeding behaviour of predators
the way in which a machine or natural phenomenon works or functions:
the erratic behaviour of the old car
be on one’s best behaviour
behave well in a social situation or when being observed:
warn them to be on their best behaviour
late Middle English: from behave, on the pattern of demeanour, and influenced by obsolete haviour from have
Remember that the ending of behaviour is -our (the spelling behavior is American).