Imagine standing in a sterile clinical environment, awaiting a medical injection. Just moments ago, a patient emerged from the same procedure, grimacing and describing the shot as intensely painful. This single piece of social information—the testimony of another—might actually amplify your own perception of pain as you brace for the needle. Groundbreaking research from Dartmouth College reveals the profound influence that social cues exert on human sensory and cognitive experiences, extending beyond mere anecdotes into measurable shifts in perception and learning.
In a study published in the prestigious Proceedings of the National Academy of Sciences, scientists explored how social information molds subjective experiences related to pain, observed suffering, and even cognitive effort. Their findings suggest that social narratives do not simply inform expectations but actively shape the intensity and quality of those experiences, creating self-fulfilling prophecies that can entrench beliefs and perceptions over time. This phenomenon was examined through a series of meticulously designed experiments involving physical and psychological stressors.
The research team, led by doctoral candidate Aryan Yazdanpanah, employed a triad of experimental paradigms that systematically assessed the effects of social information on experiential and vicarious pain, alongside cognitive effort tasks. Participants were initially exposed to artificial social cues, represented as dots on a computer screen purportedly reflecting previous participants’ ratings of pain or mental effort levels. Critically, these cues were randomized and bore no correlation to actual stimulus intensity, isolating the pure effect of expectation influenced by social input.
Following exposure to these social indicators, participants reported their anticipatory judgments about pain or mental exertion before undergoing the respective challenges. The physical pain task involved controlled heat application to the arm, set at non-damaging levels to elicit measured discomfort. The vicarious pain task required observing facial expressions of pain in video footage, simulating empathetic engagement. The cognitive task demanded mental rotation of complex 3D objects to verify identity, imposing substantial mental workload.
Results demonstrated a striking phenomenon: when participants believed that prior subjects had rated an experience as highly painful or cognitively demanding, their own reports aligned with those expectations regardless of actual stimulus intensity. For instance, even weak heat stimuli were perceived as more painful if participants anticipated severe pain based on social cues. Similarly, observing others in pain became more distressing when preceded by information suggesting high pain ratings. Cognitive exertion also followed this trend, with tasks deemed to be effortful by others being experienced as more challenging.
The implications of these findings extend far beyond laboratory settings, shedding light on the social construction of pain and cognitive challenge in everyday life. Yazdanpanah notes that this can lead to underestimating another person’s suffering if social consensus diminishes the gravity of reported pain or, conversely, hyper-aware experiences created by anticipatory beliefs. Such dynamics may exacerbate chronic pain conditions by sustaining maladaptive expectations that color perception and prevent recalibration of actual physiological states.
At the core of the observed effects lie two principal cognitive mechanisms: confirmation bias in learning and expectation-induced perceptual modulation. Confirmation bias refers to the tendency of individuals to prioritize and integrate information consistent with their pre-existing beliefs, while discounting contradictory evidence. Behavioral and computational analyses within the study revealed that participants continuously updated their assessments in favor of their social expectations, fostering a feedback loop that entrenched those beliefs despite incongruent sensory feedback.
The second mechanism entails a perceptual ‘filter’ through which experience is inevitably tinted by prior expectations. Yazdanpanah highlights the example of back-pain patients who anticipate pain when bending, despite physiological healing. This expectation amplifies perceived pain signals, weakening feedback that would normally adjust and correct false beliefs. Such persistence of maladaptive expectations contributes to sustained suffering and challenges in clinical rehabilitation.
This research has broader resonance in the age of digital communication, where social narratives, testimonials, and shared experiences rapidly disseminate through online platforms and social media. The crowd-sourced formation of expectations may influence both personal health experiences and social cognition on an unprecedented scale. The study’s insights could inform public health messaging, patient care strategies, and cognitive therapeutic interventions aimed at mitigating harmful expectation effects.
Tor Wager, distinguished professor and co-senior author of the study, stresses the neurological underpinnings of these findings. Neural systems governing learning, attention, and affective processing interact dynamically to produce these self-reinforcing cycles of belief and perception. Understanding these mechanisms opens avenues for novel treatments targeting the cognitive-emotional nexus underlying chronic pain and fatigue disorders.
Importantly, the study reinforces the critical role of social context in shaping subjective experience, emphasizing that our perceptions of pain and mental effort are not purely biological but profoundly social and cognitive. Recognizing how shared information can compound or diminish suffering and challenge cognitive appraisal provides a new framework for approaching medical, psychological, and social interventions.
In sum, this Dartmouth study elucidates how social information, expectations, and cognitive biases intertwine to create persistent judgments about pain, observed suffering, and mental exertion. By highlighting the mechanisms of confirmation bias and expectancy effects, the research offers valuable perspectives on the interplay between social influence and individual experience, urging healthcare professionals, researchers, and society to consider these factors in both clinical practice and everyday life.
Subject of Research: People
Article Title: Social information creates self-fulfilling prophecies in judgments of pain, vicarious pain, and cognitive effort
News Publication Date: 9-Feb-2026
Web References: https://www.pnas.org/doi/10.1073/pnas.2513856123
Keywords: Neuroscience, Behavioral neuroscience, Psychological science, Chronic pain, Cognition, Perception, Cognitive development, Perceptual learning, Social learning, Learning processes
