Reciprocators

I do my best to surround myself with givers, or at least reciprocators, and when I find them, I add them as people I intend to have a long-term, and in many cases lifelong, relationship with. ❋ M.D. Mark Goulston (2011)

They are also reciprocators by nature, meaning they don't take others 'effort for granted and give back to those who help them out. ❋ Unknown (2010)

They also returned less money from the investment, which may show that they are "bad reciprocators," or it might just show that after years of dealing with their younger siblings, they've come to the hard truth: people -- even younger siblings -- are greedy jerks. ❋ GamesWithWords (2009)

In the environment in which our hominin ancestors lived, where there was little positive contact with outsiders, even relatively indiscriminate altruism would tend to benefit kin or potential reciprocators, and so might have been a simple adaptive mechanism on the whole. ❋ FitzPatrick, William (2008)

This is not merely selective altruism toward kin or likely reciprocators, but altruism toward strangers who are in no position to reciprocate, and it might therefore seem puzzling from a purely biological point of view: such ❋ FitzPatrick, William (2008)

In some cases, these adaptive psychological mechanisms will involve specifically targeted or conditional altruistic motivations, involving capacities for discrimination to focus benefits on kin or on reciprocators. ❋ FitzPatrick, William (2008)

It is evolutionarily stable under some conditions in the sense that, given a population dominated by reciprocators, no single nasty individual, and no single unconditionally nice individual, will do better. ❋ Dawkins, Richard, 1941- (2006)

Could competition between small groups of our ancestors somehow have turned them into strong reciprocators? ❋ Unknown (2005)

The modular cabinet style design accommodates up to eight automatic gun controllers and an optional axis controller for easy operation of both reciprocators and in/out positioners.

Evolutionary biologists have shown through game-theoretic techniques that adaptations for social exchange can be favored and stably maintained by natural selection, provided they include design features that (i) enable them to detect cheaters (i.e., those who do not comply or reciprocate), and (ii) cause them to channel future benefits to reciprocators, not cheaters. (p. ❋ Chris (2004)