The 2005 AHA Guidelines for CPR and ECC did note that if the rescuer was unwilling or unable to provide ventilations, the rescuer should provide chest compressions only. Hands-Only CPR or CPR with both compressions and rescue breaths.
In psychology, the Big Five personality traits are five broad domains or dimensions of personality that are used to describe human personality, otherwise described as the five-factor model (FFM). The five factors are openness, conscientiousness, extraversion, agreeableness, and neuroticism.
1 An early form of personality type theory was the Four Temperaments system of Galen, based on the four humours model of Hippocrates; an extended Five Temperaments system based on the classical theory was published in 1958. One study suggests that people with Type A personalities are more likely to develop personality disorders whereas Type B personalities are more likely to become alcoholics. 2  Developmental psychologist Jerome Kagan is a prominent advocate of type theory.