Imperfect Cognitions

We humans have a well-established tendency to be overly optimistic about our future and to think that the risk of bad things happening to us is lower than is likely, while we think that the chance of good things happening to us is higher than is likely. Why is this case? What drives these positive illusions? There are two possible ways in which we can understand and try to answer these questions. We can either look at the causal mechanisms underlying unrealistic optimism, or we can ask why this feature has survived and spread through human populations. Evolutionary psychology aims to answer the second question, in essence claiming that we are unrealistically optimistic because this has had benefits in terms of survival and reproduction. So why should it be adaptive to have systematically skewed beliefs, which are frequently unwarranted and/or false?  Martie Haselton and Daniel Nettle have argued that unrealistic optimism is a form of error management, it helps us make...

Michel De Lara (below left) is a researcher concerned with the mathematical and economic aspects of risk. Jérôme Boutang (below right) is a communication professional with expertise in environmental threats such as air pollution and climate change. Together with the Paris School of Economics, they started a research project on risk perception which soon developed into the Biased Mind project. In this post they introduce their new book The Biased Mind , which is published in the Copernicus popular science collection of Springer. Why is it that the French eat snails but not slugs? What makes the number 7 so special? Will your recent marriage last? Why is it that Batman, Superman and Spiderman fearlessly defeat evil monsters, but are hopelessly shy when it comes to women? And why is it that we crave sugary and greasy food, even though we know it's not healthy? The answer to these questions is that our mind is like a smartphone, filled with adaptive software, whose different...

This is the second in a series of two posts by Phil Corlett (pictured above) and Sarah Fineberg (pictured below). Phil and Sarah are both based in the Department of Psychiatry at Yale University. In a post published last week, and this post they discuss the adaptive value of delusional beliefs via their predictive coding model of the mind, and the potential delusions have for epistemic innocence  (see their recent paper ' The Doxastic Shear Pin: Delusions as Errors of Learning and Memory ', in Cognitive Neuropsychiatry) .  Phil presented a version of the arguments below at the Royal College of Psychiatrists' Annual Meeting in Birmingham in 2015, as part of a session on delusions sponsored by project PERFECT.  Our analysis depends on two distinct systems for instrumental learning, one goal-directed, the other habitual (Daw et al., 2005 ). The goal-directed system involves learning flexible relationships between actions and outcomes instantiated in the more...

This post is by Maarten Boudry (picture above), Research Fellow in the Department of Philosophy and Moral Sciences at Ghent University. Here Maarten writes about the inspiration for his recent paper, co-authored with Stefaan Blancke and Massimo Pigliucci , ' What Makes Weird Beliefs Thrive? The Epidemiology of Pseudoscience ', published in Philosophical Psychology.  Science does not just explain the way the universe is; it also explains why people continue to believe the universe is different than it is. in other words, science is now trying to explain its own failure in persuading the population at large of its truth claims. In Why Religion is Natural and Science is Not , philosopher Robert McCauley offers ample demonstrations of the truth of his book title. Many scientific theories run roughshod over our deepest intuitions. Lewis Wolpert even remarked that 'I would almost contend that if something fits with common sense it almost certainly isn't science.’ It ...

Ema Sullivan-Bissett In this post I give an overview of what I did as a Research Fellow in the first year of project PERFECT , as well as my plans for the coming year. My research for the duration of my time working on PERFECT will focus on belief. Last year, Lisa and I worked together on three papers. The first, together with Matthew Broome and Matteo Mameli , was on the moral and legal implications of the continuity between delusional and non-delusional beliefs. The second, together with Rachel Gunn , was on what makes a belief a delusional belief. The third paper was on the status of beliefs from fiction and the teleological account of belief. My main focus this year though was on defending the one-factor account of monothematic delusion formation. According to this view, the only abnormality we need to appeal to in order to explain why a subject comes to hold a delusional belief, is the anomalous experience she has. We do not need to appeal to any abnormal deficit or bi...

On 4th June I attended some talks at the  Valuing Health Conference  at University College London (see picture above), where the themes of Dan Hausman’s book,  Valuing Health  (Oxford University Press, 2015) were discussed. The event was organised by Jo Wolff and James Wilson. The intended audience was philosophers, economists, and also healthcare policy makers. The conference started with a brief overview of the arguments in the book, presented by Dan Hausman (University of Wisconsin) . There are two basic problems the book was meant to address: (1) we need to be able to compare health improvements brought by different policies; (2) we need to know what to do with the information (e.g., maximise health). Thus, the book provides answers to the following questions: How do we assign values to health states? How do we assess policies on the basis of those values? What role should people play in assigning values to policies? The discussion raises further questi...