There is no single, universally accepted definition of attitude. However, several authors seem to agree that attitude may be thought of in terms of a tendency to evaluate a stimulus with some degree of favour of disfavour, usually expressed in cognitive, affective, or behavioural responses (Watkins, Christopher Attitude Measurement: A Methodological Approach. Unpublished Essay).
Thurstone is considered the father of attitude measurement. He addressed the issue of how favourable an individual is with regard of a given issue. He developed an attitude continuum to determine the position of favourability on the issue….(short extract)