Detecting Team Culture Erosion Before It Becomes a Crisis

John Gottman, watching couples in a Seattle research lab, found that one specific facial expression (what he called contempt, the unilateral lip raise, the eye roll, the dismissive curl) predicted divorce more reliably than how often a couple argued or what either person said about their satisfaction. He was watching trained-rater coding of in-person video, in dyads, in a controlled setting.

The Culture Erosion Index measures that same family of expression patterns in group footage: asymmetric lip movements, sustained gaze aversion while a peer is speaking, and expression-context divergence. It reports how often they appear and how strongly. Reading them against the room, the week, and the topic is a job for the coach or the leader.

The Culture Erosion Index measures three categories of behavioral signal in group footage: asymmetric lip patterns (AU10/AU14 proxies), gaze-aversion markers (sustained looking-away during peer speaking), and expression-context divergence (smile-while-stress signatures, suppressed-affect patterns). Each is a measurable signal. None is a diagnosis.

Each signal is weighted by context. A brief gaze aversion in a long meeting is ordinary; sustained gaze aversion across several sessions is more informative. Tracking frequency and intensity across sessions surfaces patterns a single observation would miss.

A lower score reports fewer of these patterns, a higher score more. Either way it is the start of a conversation.

The value of behavioural measurement is conversation timing. Traditional approaches (engagement surveys, 360 reviews, exit interviews) capture culture data on quarterly or annual cycles. By the time a survey reveals declining engagement, whatever behaviour was driving it has been active for months.

The Culture Erosion Index gives team leaders an earlier read. A leader watching weekly meeting footage can see expression-pattern frequency rising between two people and decide to hold a 1:1 sooner. A coach can notice engagement asymmetry, where one voice dominates while others withdraw, and restructure the next meeting.

The most useful application is longitudinal. After new norms, a facilitated conversation, or a role change, the Index shows whether the expression patterns shifted.

Measuring behaviour gives a leader a starting point weeks or months before a survey would. It gives them something specific to look at, sooner, so the right conversation happens while it still changes the outcome.

It works best paired with direct observation, 1:1 conversations, and team-norm setting. Read it as a prompt for an attentive leader.