The 4th Annual Meeting of the Neurophilosophy of Free Will Consortium
June 27th~30th, 2023
The Sigtuna Foundation, Sweden
PROGRAM
1:00PM~3:30PM
Meeting Registration/Check-in
4:00PM~4:30PM
Consciousness and the Fetzer Institute
Mohammed Mohammed
Coming soon
4:45PM~6:00PM
Title coming soon
Uri Maoz & Aaron Schurger
Coming soon
7:30PM~8:00PM
How does the brain stop us from making mistakes?
Nelson Totah
Imagine writing an email when you are upset. As you reach toward your phone to click “send”, you realize sending it would be a mistake; you change your mind and stop yourself from clicking. Once we act, how can we change our mind? “Free will” is a topic of lively philosophical inquiry but has limited grounding in physical observations. In the first part of this talk, I will show results from a change-of-mind (CoM) paradigm in which rats mistakenly act and then decide to stop the in-progress action. In the task, head-fixed rats discriminate two stimuli by either running on a treadmill past a distance threshold (Go) or remaining immobile (NoGo). On CoM trials, rats mistakenly begin running to the NoGo stimulus but soon realize their mistake and chose to return to immobility before crossing the threshold. We found two anterior cingulate cortex (ACC) neuronal ensembles for monitoring and adjusting actions that are distinguished by their operational timeframe. One performs real-time action monitoring to enact CoM, while the other looks back in time to monitor recent actions and outcomes. In the second part of the talk, I will discuss the neural causes of mistaken actions. Distinct groups of ACC neurons selectively respond, either to the Go, or the NoGo stimulus. On CoM trials, Go stimulus-preferring units aberrantly responded to the NoGo stimulus. If this stimulus-evoked response was larger, then the rat mistakenly ran faster. Thus, ignition of the wrong pool of stimulus-responsive neurons may drive mistaken actions. Finally, I will show that motor cortex EEG beta oscillations cause action stopping during a CoM and highlight their utility for controlling brain-machine interfaces.
8:00PM~8:30PM
The role of prestimulus and stimulus-elicited neural activity in eliciting conscious visual perception and moral responsibility
Kristina Krasich
Prominent theoretical views have debated the role of consciousness in eliciting moral responsibility. One view holds that although an agent can be responsible for actions and outcomes that are affected by unconscious perceptions, they could be even more responsible if they were conscious of the relevant information. Empirical evidence has likewise shown that participants assigned higher responsibility to agents who consciously perceived morally relevant visual information compared to those who unconsciously perceived it. One challenge with this view is that people’s ability to perceive relevant information consciously and accurately is influenced by the neurocognitive state of the brain prior to the appearance of relevant visual information. In such cases, people do not have control over whether their prestimulus neurocognitive brain state will facilitate, impair, or distort accurate conscious perception. To explore some of these issues, we will present recent empirical work that evaluates (a) the cascading effect of prestimulus and stimulus-elicited neural activity on conscious and/or accurate visual perception and (b) how lay first-person responsibility judgments varied according to this conscious and/or accurate visual perception. We will also discuss how this work can inform competing philosophical theories about consciousness, control, and moral responsibility. Last, we will outline planned research that could extend our conclusions to different kinds of reason-responsive actions.
9:00AM~10:00AM
The sense of agency in a context of reduced freedom
Emilie Caspar
The sense of agency is frequently considered as being tightly intertwined with freedom of choice, with a greater sense of agency being associated with a greater number of alternative actions and decisions. However, freedom of choice is far from being guaranteed in many contexts and situations. In this talk, I will first review studies showing that when people have a restricted number of options and rather follow the orders of an authority, their sense of agency is reduced compared to a situation where they are free to decide. I will then review several studies conducted with populations facing a daily restriction of freedom. Many social structures indeed rely on strict hierarchical organization where people are required to follow rules and orders. I will address how evolving how highly hierarchical and sometimes coercive structures restricting human’s autonomy impacts the sense of agency, even when one is free to choose which action to perform. More precisely, I will present several studies conducted with the military and with inmates in prisons with different detention regimes. Overall, we observed that such contexts restricting autonomy have a negative influence on the sense of agency, reducing it when people can make free decisions. In inmates, we even observed that they actually have a greater agency when they follow orders compared to acting freely, probably as a result of social isolation. We will also review how being trained to be accountable for one’s own action influence the sense of agency.
10:00AM~11:00AM
The six pillars of volition: a conceptual framework for the scientific study of human free will
Jake Gavenas & Uri Maoz
Volition is fundamental to goal-directed behavior and separates humans and other complex animals from simpler organisms. However, the lack of an agreed-upon definition of volition has complicated the scientific study of volition and led to conflicting results surrounding the neural mechanisms of “volitional action”. We will introduce a conceptual model of volition, defined as an umbrella term for a set of interrelated behavioral capacities (akin to “cognition”) rather than as a singular phenomenon. We first outline some of the common dichotomies employed in the study of volition, such as comparing free choice to instructed actions or acting spontaneously to acting in response to an external signal. From there, we introduce six behavioral capacities that act as “pillars” of volition: endogenous action initiation, decision-making, self-control, option generation, intention maintenance, and agency. We outline recent research that falls into each of these six areas, compare our model against prior frameworks for volition, and describe the ways in which conscious awareness interfaces with each pillar. Our intention is to introduce the model briefly and leave ample time for discussion.
11:30AM~12:30PM
Epistemic agency, intentional action & extended volition
Tillmann Vierkant
In this talk I want to present one half of the core argument of the Tinkering Mind which holds that if epistemic agency is both a form of intentional action and a form of cognition then extended cognition has to be true. I then want to apply the argumentative strategy of this argument to the case of volition.
The core argument builds on Yair Levy’s work which shows that there is no functionally relevant difference between intentional epistemic actions inside the head and environment involving epistemic actions. I argue that this argument succeeds and that because of it epistemic intentional environment involving actions are literally a form of cognition and extended cognition is true if we, very plausibly, hold that intentional epistemic actions inside the head can be constitutive parts of cognition.
In the second half of the talk, I apply this argument to the case of volition. Volition can mean many things. Here it is understood as active choice. Choices which are our actions rather than something that happens to us. I want to argue that if such active choices exist then they are subject to the same kind of argument as epistemic intentional actions. This means that such choices do not just happen inside the head but will often contain full-fledged environment involving actions. In other words, such active choices allow for extended volition.
2:00PM~3:00PM
W
Mark Hallett
3:00PM~3:20PM
Modulating the Readiness Potential via Theta-Burst Transcranial Magnetic Stimulation
Lucas Jeay-Bizot
3:20PM~3:40PM
Autonomous behaviour and the limits of human volition
Keiji Ota
The nature of volition and autonomy is one of the longest-running scientific debates. Philosophical accounts of free action distinguish between freedom from external constraint and freedom to achieve personal goals and desires. Many studies of volition focussed on the “freedom from” aspect of voluntary action by creating conditions where action is or is not independent of an external triggering stimulus. However, such studies neglect the reasons or goals that an agent may have for acting, and omit the crucial “why” aspect of voluntary action.
Here we propose that some competitive game scenarios can capture both the “freedom from” and “freedom to” aspects of voluntary action. For example, in the ‘rock, paper, scissors’ game, each player selects an action without first seeing the action of their opponent, while at the same time, innovating and discovering a specific action that defeats their opponent. In this study, we examined how free and how flexible such reasons-guided voluntary actions can be by identifying whether people can become free from internal constraints on behaviour in adaptation to competitive pressures.
3:40PM~4:00PM
Does responsibility require consciousness?
Silvia Seghezzi
Volition refers to a capacity to initiate actions through one’s autonomous conscious decisions. Voluntary actions are often made for a reason, which is typically a representation of a desirable goal state. However, existing paradigms for studying volition focus on arbitrary, meaningless actions, favouring the stimulus independency aspect of volition rather than goal-directedness (Haggard, 2019). The aim of this study was to develop a new view of volition as goal-directedness. We investigated the neurocognitive processes of goal-directed actions, their overlap with the brain areas/processes traditionally associated with voluntary actions, and their interaction with other neurocognitive systems during a problem-solving task.
4:30PM~5:30PM
Semicompatibilsm: Integrating views on free will and responsibility?
John-Dylan Haynes & Walter Sinnott-Armstrong
The implications of psychological and neuroscientific findings for the problem of free will have long been debated. On one side of this debate neuroscientists have often considered choice-predictive brain signals in simple decision tasks as evidence for determinism and thus also as challenges to responsibility. On another side of the debate the representativeness of the typical experimental tasks for free choice has often been challenged. One typical view has been that only decisions involving some form of deliberation and reasoning can be considered free, thus rendering the neurocognitive studies irrelevant because they involve seemingly random choices. This view renders determinism and free choice compatible and thus also provides a base for responsibility. While this theoretical conceptualization is tenable, we have shown in several studies that it collides with lay views on the nature of free decisions. Laypeople tend to consider exactly the seemingly random, unconstrained choices without consequences to be free, thus the opposite of the reason-based view. Here we instead follow the different path that can salvage responsibility in a determinist universe (without requiring any decision about whether this determinism is true) while at the same time maintaining compatibility with lay views. The path is to completely dissociate responsibility and free will, which might appear counter intuitive, but is again in line with lay positions. One version of this is so-called “semi-compatibilsm” as advocated by John Martin Fischer. Here, we will give a joint perspective on semi-compatibilism from the perspectives of psychology and neuroscience on the one hand and philosophy on the other.
5:30PM~6:30PM
Neurocomputational modeling of intentional processes
Hans Liljenström
Coming soon
8:00PM~8:30PM
How is deliberation related to volition? An EEG-based paradigm
Guillaume Pech
Historically, the neuroscience of volition largely focused on arbitrary (meaningless) decisions and sought to generalize findings to deliberate (meaningful) decisions. However, more recently there have been claims that the neural correlates of arbitrary and deliberate decisions might be different enough to challenge such generalizations. In particular, some studies suggested that the readiness potential (RP) is at least greatly diminished in deliberate decisions. However, other studies did not find differences between the RPs in arbitrary and deliberate decisions, leaving the matter unresolved. We therefore decided to again compare arbitrary and deliberate decisions, but this time using four different measures related to volition—the RP, the sense of agency (measured using the temporal-binding effect), willpower (measured with handgrip dynamometers as the effort exerted to indicate the decisions, using the concept of willpower as a limited resource of volition that requires effort) and the subjective sense of volition—as this would enable us to compare these two types of decisions more widely. We recruited 50 participants, who were instructed to decide between two options to maximize monetary reward. The two options could vary along two dimensions with different levels of values that were used to fill gauges. When filled, those gauges increased a monetary reward (from 15€ up to 22€) in deliberate conditions, but not in the arbitrary condition (where the gauges were associated with a 0€ increase). In the easy deliberate condition, only one dimension of the two options had to be compared to select the most rewarding option, while in the hard deliberate decision both dimensions needed to be compared, thus requiring more deliberation. We found evidence that there are no differences among the 3 conditions for the RP and sense of agency. However, we observed both a higher willpower and higher reports of subjective sense of volition in both deliberate conditions compared to the arbitrary condition. Moreover, we found evidence for no differences between the two deliberate conditions regarding willpower and the subjective sense of volition. These results indicate that there is a qualitative contrast between arbitrary and deliberate decisions concerning the effects on willpower and the subjective sense of volition, as quantitative differences in deliberation did not influence these measures. This study thus suggests that there are likely neural differences between arbitrary and deliberate decisions—although, in this task at least, those were not expressed in the RP. Our findings therefore further challenge the generalization of results from arbitrary decisions to deliberate decisions when studying volition.
8:30PM~9:00PM
Volition, Introspection, and Imagination
Paulius Rimkevičius
Preliminary evidence suggests that imagery plays a role in the experience of volition: anecdotally, participants report relying on imagery when reporting their intentions, brain areas linked to imagery are linked to volition, and models of volition that take into account imagery fit the data well. We wanted to explore this role further. We had two main questions. First, how much do people rely on imagery in reporting their intentions? Do they rely on it more when they perceive no external behavior? Second, can frequency and vividness of imagery explain variability in EEG signals associated with volition? Does it explain variability in the readiness potential? To answer these questions, we conducted two studies.
9:00AM~10:30AM
Evidence from accumulator models for early vs late decisions
A friendly debate between John-Dylan Haynes and Aaron Schurger
Studies on the readiness potential and other choice-preceding brain signals have long played a major role in the debate on free will. Such signals are often believed to suggest that the outcome of “free” decisions is determined prior to the time of the subjective decision. Recently there have been several challenges to this interpretation. Computational modelling work has suggested that the readiness potential might constitute a mere artefact of backwards averaging of stochastic brain signals, with the actual decision point occurring later when a decision threshold is crossed. In another line of work, real-time neurofeedback has suggested that an emerging decision can still be aborted, up to about 200 ms before movement onset, thus also questioning the causal role of the readiness potential. However, several questions remain open. Here we will debate (a) the evidence for accumulator model accounts of the readiness potential and (b) the evidence for or against early versus late decisions. We will then work to jointly develop an adversarial framework for testing its predictions.
10:30AM~11:30AM
Volition in non-human animals and machines
Gabriel Kreiman
Our discussions have largely centered on volition in humans. In this talk, I would like to move away from this comfort zone to brainstorm about what would constitute evidence for or against volition in non-human animals and machines. First, I will provide an update on collaborative work that we have conducted in the C. elegans worm, showing that we can create a hybrid between artificial and biological neural networks. This hybrid can control the volitional decisions of the worm and maneuver the animal towards specific targets, food, generalizing over obstacles and across individuals. Second, I will shift gears completely and show results about Turing tests designed to evaluate whether language answers come from humans and machines. I suspect that most of the audience will be scandalized by notions of volition in non-human animals and machines. Therefore, at the end, I will conclude with some provocative remarks to open up the discussion about what would or would not constitute evidence that an agent shows behavior shows volitional behaviors.
POSTER SESSION
5:15PM~6:15PM
The neuroscience of volition: a newcomer’s guide
Tomáš Dominik, PhD
Investigating unconscious reactions to unconscious stimuli
Tomáš Dominik, PhD
Illusionary Loss of Sense of Agency induced by Closed-Loop TMS-EMG
Alice Wong, PhD
The readiness potential and antecedent pupil dilations reflect two distinct aspects of conscious volition
Jake Gavenas
Slow ramping neural activity before voluntary actions emerges from spontaneous fluctuations in spiking neural networks
Jake Gavenas
Do We Have a Default Belief in Free Will?
Paulius Rimkevičius, PhD
Exploring the neural correlates of spontaneity
Lucas Jeay-Bizot
The Impact of MW on Value-Based Cued Prospective Memory
Kristina Krasich, PhD
Abstract Intended Behavior Task
Guillaume Pech
9:00AM~11:00AM
Project summary & future directions
Everyone
11:30AM~1:00PM
Public Lecture
Walter Sinnott-Armstrong & Adina Roskies
Coming soon