He is credited in the field of political science for being the first to examine presidents beyond case studies. He devised a system of organizing a president's character into either active-positive, passive-positive, active-negative, or passive-negative this system is laid out in his book
Presidential Character: Predicting Performance In The White House. • Traits of an active-positive president include: a readiness to act, high optimism, and an overall fondness of the presidency. Some examples of presidents Barber cites as active-positive include
Franklin D. Roosevelt,
Harry S. Truman,
John F. Kennedy,
Jimmy Carter, and
Gerald Ford. • Traits of a passive-positive president include: a low self-esteem compensated by an ingratiating personality, superficially optimistic, and a desire to please. Examples of passive-positive presidents include
William Howard Taft,
Ronald Reagan, and
Warren G. Harding. • Traits of an active-negative president include: lack of deriving joy after expending much effort on tasks, aggressive, highly rigid, and having a general view of power as a means to self-realization. Examples of active-negative presidents include
Woodrow Wilson,
Herbert Hoover, and
Richard Nixon. • Traits of a passive-negative president include: a strong sense of duty, desire to avoid power, low self-esteem compensated by service towards others, and an overall aversion to intense political negotiation. Presidential examples include
Calvin Coolidge and
Dwight D. Eisenhower. ==See also==