Why a shorter life makes exploring less worthwhile
Learning is an investment with a delay. A forager who tries an unfamiliar food patch or a new handling technique pays a cost up front—time, risk, missed meals—and only later enjoys the improved returns. The longer the forager expects to live, the more of that later period exists to collect the payoff, so the balance tilts toward exploring early and exploiting the knowledge afterward [1].
Turn the time horizon down and the arithmetic reverses. If the future in which the learning would pay off is short or uncertain, the same upfront cost buys fewer later benefits, so a forager should become less willing to invest in exploration and stick with what already works [1]. This is a prediction about foragers' willingness to invest, not a measured lifespan effect in a specific species or population.
The trade-off is not one single switch
It is tempting to treat exploration versus exploitation as a single dial that life expectancy turns down. Evidence from human decision-making suggests the dial is more complicated. In a study of choice and attention, participants explored less with their choices when uncertainty was expected rather than sudden, but their attention did not follow the same pattern—suggesting choice and attention may index separate aspects of the trade-off [2].
That study also found the effect depended on prior learning: the shift in exploration appeared only when participants had a chance to learn the task's structure before the uncertain period began [2]. So the same nominal situation—uncertainty—can push exploration in different directions depending on what was learned beforehand and which behavior is being measured.
Does the lifespan logic carry over to other exploration tasks?
The lifespan argument is framed for foraging ecology, where exploration has a clear cost paid now and a benefit collected later [1]. The human choice-and-attention work does not test life expectancy at all; it tests how expected versus unexpected uncertainty changes exploration [2]. That leaves the generalization question open rather than answered: the two lines of evidence are compatible in spirit—both say exploration depends on what the future is expected to hold—but they do not demonstrate that a single lifespan-driven rule governs every paradigm.
A practical reading is that life expectancy should matter most where learning's payoff is genuinely deferred and where the forager can anticipate how long the payoff period will last. Where exploration is driven instead by sudden uncertainty, or where attention and choice diverge, the same lifespan logic may apply weakly or not at all [2]. The honest answer to whether the trade-off generalizes is that the foraging prediction is well motivated but the cross-paradigm evidence is not yet there.
Sources used in this answer
Foraging ecology and learning
Foragers are predicted to invest less in costly early exploration when their life expectancy decreases, because the later period in which learning pays off is shorter.
Protection from uncertainty in the exploration/exploitation trade-off.
In a human choice-and-attention task, expected uncertainty led to less exploration in choices but not in attention, and this effect occurred only when participants could first learn the task structure.