In “Sentences to ponder, The Strong Situation Hypothesis,” Tyler Cowen quotes from a study:
This hypothesis, based on the work of Mischel (1977), proposes that personality differences are especially like to be outwardly expressed in “weak” situations offering no clear situational clues and a wide range of possibilities as to how to behave. Conversely, individual differences are expected to have less room for expression in “strong” situations where the choice of behavioral outcomes is severely limited and where everyone is bound to behave in a similar way.
That’s especially interesting to me because I’ve long said that many literary novels are concerned with family, love, politics, and the like because those are open-ended domains that tend to be places where personalities can be expressed. In many “flat” thrillers, by contrast, there is one obvious right thing to do (stop the bad guys, don’t let the nuclear device go off, etc.) and the only important question is whether the thing can be accomplished and how it can be accomplished. In that respect personality becomes backgrounded to the task at hand. The interior mental state of the characters become binary: They succeed or they fail. Their sense of interiority isn’t that important.
In a genre like science fiction one can see the thriller model at work in a novel like The Martian, in which survival is the only important question, and the broader model at work in a novel like Stranger in a Strange Land, or in many others. In real life, the kind of music a person who is starving to death likes is not very important, but the kind of music a person who is on a date likes may be very important.
Alternately, one could say that personality is a relatively high point on Maslow’s Hierarchy of Needs (whatever the other deficiencies of the hierarchy model).
(In another world, this point could be part of the “Character” chapter in How Fiction Works.)
I wrote a little more about this here, previously, in 2011.