Six degrees of separation: An interactive teaching activity for social networks

The six degrees of separation (6-DoS) activity is an interactive web-based exercise that enables participants to experience a key concept in social network analysis: cognitive social structures (CSS). Our perception of who knows whom in a network is a powerful enabler of leveraging and contributing to it. In this 3–5-min network-routing activity (30–60 min from setup to debrief), each participant selects a set of contacts and delivers a message to a designated target to whom they are indirectly connected. The message is relayed through intermediaries, mirroring Milgram’s (1967) small-world experiment, which surprisingly showed that short chains of acquaintances connect most individuals. This process illustrates foundational network concepts beyond CSS, including indirect ties, network paths, and how structural positions shape information flow. By engaging in 6-DoS, participants gain an experiential understanding of how their choice of contacts and their network awareness – or lack of it – shapes efficient information seeking and dissemination. The debriefing extends these insights to broader concepts, including the small-world phenomenon, brokerage, redundancy, and communication strategies. 6-DoS is adaptable for diverse educational contexts, from undergraduate and graduate courses in social networks, management, and communication to professional development and corporate onboarding. Because it is easy to set up, requires no specialized equipment, and can be completed quickly, 6-DoS is well-suited to both in-person and virtual environments. By blending playful interaction with conceptual rigor, 6-DoS transforms abstract network concepts into a concrete, shared experience so that learners do not just understand how networks work – they feel it.