This type of personality concerns how people respond to stress.
However, although its name implies a personality typology, it is more appropriately conceptualized as a trait continuum, with extremes Type-A and Type-B individuals on each end.
The study was able to control for other important variables, such as smoking and lifestyle.
This is good as it makes it less likely that such extraneous variables could confound the results of the study.
The Western Collaborative Group Study followed 3154 healthy men, aged between thirty-nine and fifty-nine for eight and a half years.
Participants were asked to complete a questionnaire.
Friedman and Rosenman (1976) labeled this behavior Type A personality.
They subsequently conduced research to show that people with type A personality run a higher risk of heart disease and high blood pressure than type Bs.
When this behavior is expressed overtly (i.e., physical behavior) it generally involves aggression and possible bullying (Forshaw, 2012).
Hostility appears to be the main factor linked to heart disease and is a better predictor than the TAPB as a whole.