In my last post, I laid out a new project I'm working on about the perceptual life of cells. I spent the day at the Crick Institute recently to move the project forward, and this post is about developing the perception-action analysis in more detail. The goal in this post is to address the first question that needs an answer, specifically, are the cells perceiving-acting agents, or just doing something more mechanical?. In the next post, I will apply our task dynamical analysis to frame the project (from Wilson & Golonka, 2013).
To cut to the chase, I'm now pretty happy that a perception-action analysis is appropriate at this particular cellular level. I set a high bar for this (mostly by reading Turvey & Carello papers, which should illustrate that height pretty clearly :) but it seems clear the cells are behaving with respect to information, and not simply being buffeted by forces. Applying some key criteria, and resting on the hard work of Turvey & Carello showing that intelligence isn't about brains but about behaviour, I will claim here that Bentley's endothelial cells are agents that exhibit intelligent behaviour, and there is a clear need for a behavioural scale contribution to any explanation of that behaviour.
Over the summer, at ICPA 2019, I met a computational biologist called Katie Bentley. She is interested in angiogenesis, the cellular level process of new blood vessel growth. She was at ICPA because she has been developing a more dynamical systems approach to understanding how angiogenesis works. More specifically, her work suggests that the cells involved behave in very active, exploratory ways that are very analogous to the kinds of perception-action systems ecological psychologists study, and she was looking for people to help bring our insights to her work. We've been chatting, and the project of connecting our work is now on the go.
The basic idea is simple. Mainstream cell biology is currently very gene-centric, in almost exactly the same way as mainstream cognitive science is very brain-centric. Like cognitive science, this has been methods driven - it's been hard to study cells in action, and imaging techniques have been static and structural. In general, when biologists see a cell doing something, the research goes looking for the genes that are making it do that thing. Bentley's work has instead started asking questions about time - how long does something take to happen? How are the component processes organised in time? What happens if that timing is perturbed? She's now in a good position to say that one of the key regulators of the dynamics of angiogenesis is timing, that this timing is not centrally controlled by a genetic clock, and that a temporal perspective should therefore move front and centre of the research on the process.
The analogy between the debates between information processing and ecological accounts of cognition and behaviour are uncanny, and her move is a very ecological one. The question we are now discussing is whether it makes sense to start considering this process as not just a dynamical process, but a perception-action process, which has become an option given her temporal perspective on things.
In this post I'm going to discuss some of the specific empirical findings reviewed in her paper The Temporal Basis of Angiogenesis, which is a good read even if you aren't a cell biologist. I'm getting ready to go hang out in her lab this week and I'm working on figuring out the best questions to be asking to move this project forward in the best way. Remember, Gibson's theory is about what happens at the ecological scale of organisms like us, and there's no guarantee that it will have much to say about the perceptual life of cells. However, there is definitely enough evidence to make it worth checking out, and that's what I'll be up to for the next little while.
Posts
