If the ship is sinking,do you save yourself or risk your life to save-|||-others? The answer,it seems,depends on how long the sinking takes.-|||-If there`s enough time, you can switch from adrenalin(肾上腺素)--|||-driven self-preservation (自我保护)to conscience (良知,良心)--|||-driven self-sacrifice.-|||-The viewpoints come from a new comparison of survival data from the-|||-sinking of the Titanic in 1912 with the loss of 1517 lives out of 2207,-|||-and the sinking of the Lusitania three years later,which killed 1198-|||-passengers out of 1949.-|||-The main difference between the two sinkings was time:it took two-|||-hours and 40 minutes for the Titanic to go down,while the Lusitania-|||-sank in just 18 minutes. The result: a huge difference in survivor-|||-descriptions.-|||-On the Lusitania,suruival favored able-bod men aged between 16-|||-and 35,whose probability of surviving was 7.9 percent higher than-|||-that for all remaining passengers over 35 years old.On the Titanic,in-|||-contrast,the same group of men were 6.5 percent more likely to die-|||-than their elders.Children were 30.9 percent more likely to survive on-|||-the Titanic,compared with passengers over 35,while on the Lusitania-|||-children had no better surval chance.-|||-The main reason,according to Benno Torgler of Queensland University-|||-of Technology in Brisbane,Australia,is that simple adrenali n-driven-|||-survival instinct and bodily strength affected survival on the fast--|||-sinking Lusitania. On the slow-sinking Titanic,by contrast, there was-|||-time for social norms of giving priority to women and children.-|||-Strikingly, women of all ages on the Titanic had a probability of-|||-survival 53 percent higher than for men,compared with an 11 percent-|||-higher chance of dying on the Lusitania.-|||-People say you only care about yourself, but the analysis shows-|||-that people will sacrifice themselves," sa Torgler. "But time is-|||-crucial,because the elements that restart social interactions only-|||-emerge after time."-|||-The results also support director James Cameron` s interpretation