While many personality traits, such as extroversion, are innate, most researchers believe that Type A personality characteristics are more of a reaction to environmental factors, or tendencies toward certain behaviors, and are influenced by situations, including culture and job structure.

What is Type A personality prone to?

The Type A personality types behavior makes them more prone to stress-related illnesses such as CHD, raised blood pressure, etc. As a result, they are more likely to have the stress hormones present, which over a long period of time leads to a range of stress-related illnesses.