Speaking of Psychology
Speaking of Psychology

Catching fire: What goes viral and why? With Jonah Berger, PhD

Why do some ideas, products, news stories and trends spread like wildfire, while others disappear? Jonah Berger, PhD, discusses the science of what catches on; the psychological forces that drive word of mouth, including social currency and high-arousal emotions like awe and anger; whether online an

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Episode Summary

Executive Summary: Dr. Jonah Berger explains that sharing is not random but driven by psychology, summarized in his STEPS framework: social currency, triggers, emotion, public visibility, practical value, and stories. He argues that high-arousal emotions, top-of-mind cues, and making people look smart or helpful drive both online and offline spread, and that combating misinformation requires making truthful content easier to transmit, not just more correct.

Main Topics: The psychology of why people share: Berger argues that sharing follows recurring psychological patterns rather than luck, and that the same principles shape word of mouth across products, ideas, and media. The STEPS framework: He outlines six drivers of transmission: social currency, triggers, emotion, public, practical value, and stories, which together explain why content gets passed on. Social currency and insider status: People share information that makes them look smart, special, or in-the-know; secrets and exclusive experiences are especially shareable because they confer status. Emotion, arousal, and virality: Not all emotions spread equally: high-arousal emotions such as awe and anger increase sharing, while low-arousal states such as sadness and contentment reduce it. Triggers and top-of-mind thinking: Environmental cues and repeated associations keep ideas accessible, making them more likely to be mentioned in conversation and shared. Social media, offline sharing, and misinformation: Platforms speed diffusion, but most sharing still happens offline; misinformation spreads because it exploits the same psychological drivers as true information, so truthful content must be designed for sharing. New research methods and multimodal communication: Berger describes using NLP, topic modeling, audio/visual analysis, and body-language data to study how language, gestures, and delivery shape engagement and influence.

Key Arguments: Sharing is governed by predictable psychological mechanisms, not random virality. People share things that improve how they are perceived by others, especially information that signals insider knowledge or status. High-arousal emotions are more shareable than low-arousal emotions, regardless of whether they are positive or negative. Triggers matter because what is top of mind is more likely to become tip of tongue. Offline word of mouth remains crucial; social media changes speed and scale more than the basic psychology of sharing. Misinformation spreads for the same reasons as accurate content, so countering it requires making truthful information more engaging and transmissible. Technology broadens the data researchers can use, but psychology remains the key explanatory layer. Good products or causes do not automatically spread; they need to be packaged in ways that fit human attention and transmission habits.

Data Points: STEPS framework components: 6 - Six psychological drivers of sharing: social currency, triggers, emotion, public, practical value, stories. Academic publications: More than 80 articles - Berger’s publication record was cited as part of his expertise on word of mouth and influence. Empirical corpus for emotion study: Six months of New York Times articles - Used to compare articles that made the most emailed list with those that did not. Corpus size in emotion study: Thousands of articles - The New York Times analysis included thousands of articles across sections. Study coverage: Tens of thousands of brands - Berger says his lab analyzed brand-level diffusion patterns across many categories. Purchase data scale: Millions of purchases - Used to identify recurring drivers of product diffusion and popularity. Baseline section example: 2000s platforms changed over time (MySpace, Foursquare, Facebook) - Illustrates that technologies come and go while psychological drivers persist. Song example: Old Town Road - Cited as an atypical mix of country and hip-hop that became highly successful on Billboard.

Pivotal Quotes: "there's actually really a science behind it" — Jonah Berger: Explaining that popularity and virality follow identifiable patterns rather than pure luck. "the better something makes people look, the more likely they are to share it" — Jonah Berger: Describing social currency as a core driver of sharing behavior. "good stuff isn't enough" — Jonah Berger: Summing up why truthful or valuable content still needs to be designed for transmission.

Implications: For communicators, brands, and public-interest groups, success depends on engineering messages for status, emotion, triggers, and clarity. To reduce misinformation and increase reach, make accurate content more shareable, not just more accurate.

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