The World of Work Project

Type A and Type B Personalities

Type A & B personalities refers to a somewhat discredited theory that people fall into two categories: Type A (competitive, impatient, ambitious) and Type B (relaxed, less frantic and calmer), and that Type A people have worse heart health.

Summary by The World of Work Project

Type A and Type B Personalities

Type A people are always in a rush…

The phrase “type A” personality entered the common lexicon many years ago and you’ll still regularly hear the phrase used to refer to “go-getters” or active and driven individuals.

While, of course, the world does have active, driven and motivated individuals, the actual concept of Type A and Type B personalities as defined in the original work on this concept is fairly flawed.

The Research

The concept of Type A and Type B personalities is based on research undertaken by two cardiologists, Friedman and Rosenman, who were looking into heart health.

In their work they identified a relationship between personality types and risk of heart disease and high blood pressure. Over time, the team identified that people who are generally more wound up (Type A) have worse heart health that people who are generally more relaxed (Type B).  In their work they sought to provide more details around they characteristics of these Type A and Type B personalities.

Type A Personalities

Type A personalities are generally more highly-strung than type B. They tend to be competitive, self-critical, intense and likely to overact. They’re always in a rush and can be impatient or frustrated by inefficiency. They try and make the most of their time and may try to multi-task.

They often work very hard, but generate little joy from their accomplishments. They’re also more likely to become angry than type B personalities. They may see the worst in others and may take part in physical or verbal aggression and bullying.

Type A people might get angry and point at you.

Type B Personalities

Type B personalities are calmer and more relaxed than their type A counterparts. They come across as less in a constant rush to get things done and often have less an a sense of need to compete, perform well, achieve highly or complete many things.

They’re patient, measured, more tolerant and more likely to spend their time relaxing or helping  others. They generally see the good side of events and people and seldom become frustrated or angry with others, and are almost never instigators or either physical of verbal aggression.

The World of Work Project View

The phrases Type A and Type B are fairly commonly used, and there’s nothing really wrong with these labels being used as a shorthand way to describe people. That said, there’s nothing really scientific about it either. Like many personality categorizations, they’re not based on much evidence.

Smoking Kills

In relation to the original research as carried out in relation to heart health, things are even more dubious. This research is somewhat discredited with claims that tobacco funding supported it in an effort to find non smoking related causes for poor coronary health.

There remains a scientific view that anger and aggression are causally correlated to increased risks of poor heart health, but a there seems to be little consensus regarding the other aspects detailed in this model.

In our view, there is no real reason to consider this model in the workplace. Where personality tests are desired, we think the “Big 5” is the best one to adopt.

Sources and further reading

Where possible we always recommend that people read up on the original sources of information and ideas.

This post is based on original work by Friedman and Rosenman. You can read more in their 1976 article “Multivariate prediction of coronary heart disease during 8.5 year follow-up in the western collaborative group study“.


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