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.
This issue is discussed in the aforementioned chapter. Five-Factor Theory, formulated by Robert (Jeff) McCrae and Paul Costa (see, for example, their 2008 Handbook of Personality chapter), is an explanatory account of the role of the Big Five factors in personality.