Where does satiation collide?

Hermann Heinrich Gossen's 1854 Entwickelung der Gesetze des menschlichen Verkehrs set out that the extra satisfaction a person gains from a good falls as they consume more of it, until a want is fully met and further amounts add nothing: that fully met position is the satiation of a want. Frank Ramsey's 1928 A mathematical theory of saving later named the highest attainable rate of enjoyment 'Bliss', the ceiling a saving economy approaches. Here the referent is a position in a person's preferences or a utility function, described in goods and satisfaction, not a bodily signal that a meal is over, a word that has gone blank, or predators too full to eat more prey.[1][2]

Unit

A bundle or quantity of a good at which added consumption yields no further satisfaction

Recovery means

Not applicable

Measured by

Inferred from demand curves and indifference maps as the point where marginal utility reaches zero

Severance and Washburn's 1907 The loss of associative power in words after long fixation reported that repeating or staring at a word makes it briefly look strange and drained of meaning. Jakobovits and Lambert's 1961 Semantic satiation among bilinguals gave the effect its lasting name and tied it to the fading of a repeated word's associations. The referent is a temporary change in how a mind processes an over-repeated word, tested by having people say a word many times, and it has nothing to do with a body that has eaten enough, a fully met economic want, or predators overwhelmed by numbers.[3][4]

Unit

A single instance of a word losing its felt meaning after massed repetition

Recovery means

The word's meaning returns after a short rest from repeating it

Measured by

Tested by having people repeat a word for a set time, then rating or timing how its meaning weakens

Anand and Brobeck's 1951 Hypothalamic control of food intake in rats and cats located a region of the brain that, when damaged, led animals to overeat, and named it a satiety center that normally signals when to stop feeding. Jean Mayer's 1953 Glucostatic mechanism of regulation of food intake proposed that a fall and rise in usable blood sugar drives the shift from hunger to fullness. The referent is a measured physiological state that ends a meal and lowers appetite, tracked in the body and brain, not a position in a utility function, a word gone blank, or predators too full to hunt.[5][6]

Unit

One episode of physiological fullness that suppresses further eating

Recovery means

Appetite returns as the body uses up its fuel and hunger signals rebuild

Measured by

Assessed by food intake, time to the next meal, and gut and brain signals such as blood glucose and satiety hormones

Daniel Janzen's 1971 Seed predation by animals described how a plant population can flood its seed eaters in a single bumper year, so many seeds arrive together that the animals fill up and a fixed number of survivors escape being eaten. Kelly's 1994 The evolutionary ecology of mast seeding reviewed how heavy seeding synchronized across a population works to satiate these predators. The referent is a population-level outcome in which prey survive by overwhelming the appetite of their consumers, counted as survival rates against seed or prey numbers, and it is unrelated to one animal's fullness, a fully met economic want, or a word that has lost its meaning.[7][8]

Unit

A survival outcome for a prey cohort whose numbers exceed what local predators can consume

Recovery means

Not applicable

Measured by

Estimated by the fraction of seeds or prey surviving predation as their local abundance rises