Life-event stress scales, which assign a relative weight to different significant events (such as bereavement, divorce or a house move), are used to illustrate that:

aStress from several moderate life events accumulating in a short period can add up to a level of risk comparable to one major single eventbStress scales are purely theoretical and have no relevance to flight safetycOnly one single event can ever matter at a time, with no cumulative effectdPositive life events, such as a promotion, can never contribute to stress

Abandon test