Avoid Confusion! Does Survival Processing Shape the Spontaneous Use of Learning Strategies for Distinguishing Edible and Poisonous Mushroom Twins?

Hunter-gatherers faced the survival threat of confusing edible mushrooms with their poisonous twins, imposing selection pressure on those who failed to detect subtle visual differences. Grounded in the ancestral priorities framework, which posits that the human mind is adapted to handle prehistoric challenges, we investigated whether humans spontaneously engage in learning strategies that allow a reliable discrimination to cope with the confusion threat-such as contrasting. We manipulated the labels of two mushroom types between subjects-poisonous and edible (survival threat) versus growing on acidic and alkaline to neutral soil (control)-and engaged them in confusion imagery. We traced learners' spontaneous use of contrasting switches between mushroom twins during learning. Our findings align with the ancestral priorities view: Learners in the survival threat condition imagined the dangerous consequences of confusion more vividly. With the exception of the die-hard blockers (who fully refrained from using contrasting switches), this deep engagement in survival processing led learners to shift their study efforts toward finding differences by switching between mushroom twins-these contrasting switches led to better discrimination. Accordingly, raising awareness of confusion risks can shift learning behaviors toward more effective strategies, offering educational value for settings where accurate discrimination is crucial.