Welcome to the website for the Communicative Mind Laboratory (Co-Mind) in the Department of Communication at UCLA. We conduct research on the cognitive science of communication. Our focus is on dynamics—how communication and cognition are coordinated in time. The lab's research involves a diversity of methods, including corpus and large-scale data analysis, behavioral experimentation, and computational modeling. We are located in Rolfe Hall.

Recent goings-on

[8/1/19] I'll be presenting at the Society for Chaos Theory in Psychology & Life Sciences 29th Annual International Conference at Chapman University. The title of my talk is "The Integrated Dynamics of Natural Language Performance," and I'll be summarizing work from our lab and other labs on how we can expand our understanding of the underlying dynamics of human interaction.

3 kinds of "coordination"

In the presentation, I highlighted three ways in which "coordination" can be construed based on an integration of our work. The first, and perhaps the most studied, is the sometimes weak but relatively widespread "hum" of local coordination -- sometimes known as "synchrony." We recently demonstrated another form of coordination, in which interlocutors exhibit a more "global" temporal coordination, called complexity matching. In complexity matching, interlocutors tend to exhibit similar fluctuations -- which may be loosely called "cadence" or "rhythm." Complexity matching need not involve immediate synchrony, but can span across several minutes. Another kind of coordination we have studied is the manner or distribution of events in interaction. We recently showed that many interactive behaviors are more "bursty" than rhythmic, suggesting that different nonlinear models, beyond coupled oscillators, may be needed to understand these behaviors.


[7/20/19] I contributed to a recent Digital Features section of the Psychonomic Society, on the topic of big data. I summarize some work from others that highlights the need for more theory to help shape our approach to big data and research practices: big theory? After more thought, and reconsidering the cool "big experiments" idea of Gureckis and Griffiths, this figure appeared in a dream. I wish I'd discussed something like this to my own commentary. In some ways, cognitive science has been steeped in grand theory, the conflict among many paradigms (see an oldie but goodie here?). My commentary focuses on ideas from Oberauer and Lewandowsky, sharpening the concept of theory and how studies and data should be tightly tethered to it.


[5/1/19] To illustrate principles of computer modeling and communication, we created a chatbot authoring tool for use in undergraduate class COMM 131: Computer Models of Communicators. Students are able to build fully functioning and deployable chatbots (deployable on Discord!). The system helps students understand expert rule systems, their design, and how to test them with users. The class also includes discussion of neural network approaches to language, and we also explored a simplified neural network conversational bot which you can read about here.


[4/15/19] In a new SCTPLS newsletter article, I summarize the recent paper with my collaborator Harish Bhat on using data science techniques to recover, from raw data, precise governing equations for dynamical systems (in the form of ordinary differential equations). We illustrate it on model systems here, including socio-cognitive systems -- where the governing equations may reveal couplings between agents. Code on GitHub and library now available on CRAN.


[3/5/19] In a project led by Ph.D. student Camila Alviar, we use freely available video of presentations as samples of temporally extended communication. Using automated analysis methods, we explore this performance as a kind of "socio-technical" system, analyzing voice, body movements, and slide changes as an integrated system. Now published at Cognitive Science. Code here.






info æt co-mind
Department of Communication
2225 Rolfe Hall, UCLA
Los Angeles, 90095