A groundbreaking study conducted by researchers from Trinity Business School and NEOMA Business School has unveiled a troubling reality regarding digital media consumption: users are forming rigid, lasting opinions on unfamiliar topics after viewing as few as three to five social media posts. The research indicates that these opinions stabilize with remarkable speed, meaning that once a stance is adopted, subsequent information—regardless of its factual accuracy—has little power to alter the individual’s perspective.
The study, which utilized US-based participants exposed to Instagram-style content, highlights that the credibility of information is often determined by superficial factors rather than empirical evidence. Professor Ashish Kumar Jha, a co-author of the study, noted that audiences are most susceptible to “celebrity experts”—figures who combine the reach of traditional fame with professional titles. Because platforms allow users to self-designate credentials such as “Dr.” or “professor” without verification, the barrier to appearing authoritative is dangerously low, allowing voices with little expertise to shape public opinion overnight.
This phenomenon is driven by cognitive shortcuts, where users prioritize familiarity and coherence over the rigor of fact-checking. In the fast-paced environment of social media, the brain relies on these heuristics to process content rapidly. Once an initial opinion is cemented, the study found a strong confirmation bias: participants were significantly more likely to engage with and share content that reinforced their existing views, while dismissing contradictory evidence. Consequently, the threshold for a user to perceive themselves as an expert is minimal, creating a pipeline for the rapid spread of misinformation.
The psychological impact of this digital echo chamber is profound. As individuals begin to identify as experts on specific topics, they often view fact-checking or skeptical inquiries as personal attacks. Rather than prompting a reassessment of their views, being challenged often causes these beliefs to calcify further. Professor Kumar Jha emphasizes that this cycle of belief strengthens the user’s conviction in the face of truth, making them potent vehicles for the further dissemination of disinformation, as they genuinely believe they are sharing facts.
This structural shift in how people access information comes at a critical time, as traditional news consumption continues to wane. According to the 2026 Reuters Digital News Report, social media and video networks have officially surpassed traditional outlets as the primary source for news globally. This transition marks a significant departure in the media landscape, as social platforms are optimized for engagement and viral potential rather than verification or journalistic integrity, leaving the public vulnerable to the influence of non-expert voices.
In light of these findings, the path forward for educators, media organizations, and fact-checkers is clear but difficult: the window for impactful intervention is narrowing. Professor Kumar Jha warns that if information providers wish to counter the influence of misinformation, they must “move early.” By the time a narrative has gained traction on social media, the users’ opinions have largely stabilized, making the effort to provide accurate, corrective information an uphill battle against deeply entrenched, false perceptions.