曖昧だが生存に関連する刺激を探求するための適応的動機としての病的な好奇心

Morbid curiosity, or the seemingly paradoxical drive to engage with aversive or grotesque stimuli, has long puzzled psychologists, who have traditionally framed it as either a form of sensation-seeking or a mechanism for unambiguous threat learning. The current article proposes a novel adaptationist model positioning morbid curiosity as an evolved cognitive mechanism specifically tuned to resolve ambiguity surrounding survival-relevant stimuli. Drawing on evolutionary theory, cognitive psychology, and neurobiological evidence, I argue that morbid curiosity functions primarily as an uncertainty-reduction strategy, motivating individuals to approach ambiguous stimuli to clarify their threat or benefit. Unlike basic emotions such as fear or disgust that typically trigger immediate avoidance, morbid curiosity fosters cautious approach behaviors aimed at gathering survival-critical information. The proposed model thereby reconceptualizes morbid curiosity as an adaptive, ambiguity-oriented cognitive system, offering novel insights into broader questions about human motivation, information-seeking, and adaptive cognition. (PsycInfo Database Record (c) 2026 APA, all rights reserved).