CogNation

Guest Dr. Aaron Schurger talks to us about his research on the meaning of the "readiness potential", which has been referred to as "the brain signature of the will". Although this neural signal was already famous from research in the 1960s, it was Benjamin Libet's infamous experiments in the 1980s that proportedly showed that the readiness potential preceded an act of free will by a few hundred milliseconds. More recently (in press), Dr. Schurger and his colleagues have convincingly demonstrated that the readiness potential is not in fact predictive of an act of free will, but instead comes from a lack of a proper experimental control. Resources: Here is what a classifier is (a topic that comes up that may be unfamiliar to some). For advanced readers, check out AdaBoost, a tool that increases performance in classifiers and other types of machine learning. Papers "The Time Course of Neural Activity Predictive of Impending Movement" (Basbug, Schapire, & Schurger, TO BE PUBLISHED SOON) An accumulator model for spontaneous neural activity prior to self-initiated movement (Schurger, Sitt, & Dehaene, 2012) Unconscious cerebral initiative and the role of conscious will in voluntary action (Libet's 1985 experiments)Special Guest: Aaron Schurger.

Guest Dr. Michael Trujillo of Karuna Labs talks to us about pain perception and recent research on the management of pain. We discuss a recent article (Hird et al.) exploring the degree to which expectation can alter the perception of pain, as well as Trujillo's work in using Virtual Reality in pain management. Boundary effects of expectation in human pain perception (2019) by Hird, Charalambous, El-Deredy, Jones, & Talmi Shout out to Gareth Thompson of Digitimer

Dr. Erick Gallun joins us today to talk about the latest in audiology research, and how it can be applied to help those with a range of hearing problems. His research has focused on rehabilitation with Veteran's Association (VA) patients. Rapid-response medical care and an understanding of how hearing is affected by brain damage are critical areas in need of research. Advances in portable computing have made widespread assessment possible, and Virtual Reality applications show promise for cost-effective and standardized assessment. Resources: P.A.R.T. (Portable Automated Rapid Testing): + link on iTunes Independent impacts of age and hearing loss on spatial release in a complex auditory environment by Gallun, et al., 2013Special Guest: Erick Gallun.

Evidence has mounted that high-impact sports like boxing and football can lead to later cognitive problems, and there is increasing awareness that concussions should be taken seriously. So how does this all happen, and should you be worried? We take a look at some recent studies that shed some light on the topic. Articles: https://jamanetwork.com/journals/jama/article-abstract/2645104 https://www.sciencedirect.com/science/article/pii/S104474311500041X

David Wulff, author of the comprehensive "Psychology of Religion: Classic and Contemporary", talks with us today about some of the issues that psychologists grapple with in studying religion. How can a researcher take a fair and unbiased approach to a topic so fraught with issues of personal belief and faith? How important is belief anyway -- must one sacrifice the intellect to engage in religious practice? David discusses his recent research; his measure of religious tendencies, called the "Faith Q-Sort", has been used internationally to understand how religion manifests differently across individuals. Resources: Psychology of Religion: Classic and Contemporary Autobiography: The Evolution of a Psychologist of Religion

In the 1960s, the social psychologist Stanley Milgram performed some of the most famous experiments in psychology history, demonstrating that ordinary people could do terrible things in certain circumstances. Joe and Rolf look into the meaning of these experiments from a contemporary view. How are they holding up over 50 years later, and what else have we learned about obedience? Milgram's experiments Milgram in Virtual Reality (Gonzalez-Franco et al., 2018)

Dr. Michael Frank of Brown University talks to us about dopamine -- how it works in the brain, what his research has done to elucidate the function of dopamine circuits, and some of the genetics behind it. A really fascinating dive into a great topic! Papers: Dopamine and free will: Dopamine and learning:

Joe and Rolf discuss recent research finding that recordings from the brain can be used to reconstruct the speech that is being thought about. Getting into the prospects of mind-reading and other futuristic possibilities, they discuss some of the limitations of research in the area and what makes progress so difficult. Source material: Speech Synthesis from Neural Decoding of Spoken Sentences by G. Anumanchipalli et al. (2019) YouTube video of the model

Our guest is Karen Schloss, who studies the way in which color is imbued with meaning through a lifetime of associations with objects (like bananas and fire trucks) and concepts (like love and politics). We discuss her research, including topics such as: What color should recycling bins be? A tool that can help designers use color-concept associations in their work The "blueberry problem" (why is is that blueberries aren't very blue?) How to market a blue banana What color heaven and hell should be Links: Dr. Karen Schloss's lab at the Wisconsin Institute for Discovery Colorgorical: A color-concept tool Our paper for discussion: "Color inference in visual communication: the meaning of colors in recycling"

We examine a paper that finds sleep disruption from using tablet computers (as compared to reading a book in dim light). How much should we be worried about the effects of screens on a good night's sleep? There's good reason to believe that blue light is the main culprit -- recently discovered receptors in the eye that respond to blue light directly connect to brain areas implicated in sleep regulation. We lay out the case.... Papers: "Evening use of light-emitting eReaders...." "Melanopsin: photoreceptors, physiology and potential"