Henk Aarts

Utrecht University | UU · Department of Psychology

The concept of 'agentic shift,' introduced by Stanley Milgram, suggests that obedience reduces the sense of agency. A recent study examined this idea in a financial harm context and showed that coercion increases the perceived time between action and outcomes – a marker of agency. Importantly, in this study, participants were agent and victim (rely...

Algorithms support many processes in modern society. Research using trust games frequently reports that people are less inclined to cooperate when believed to play against an algorithm. Trust is, however, malleable by contextual factors and social presence can increase the willingness to collaborate. We investigated whether situating cooperation wi...

While there are abundant reasons that might lead us to form wrong first impressions, further interaction (sampling) opportunities should allow us to attenuate such initial biases. Sometimes, however, theses biases persist despite repeated sampling opportunities, such as in superstitions or stereotypes. In two studies (Ns = 100), we investigate this...

Previous research suggests that cues can motivate goal-directed behavior directly. According to the framework of human unconscious goal pursuit, exposure to goal-relevant cues yields two distinct behavioral effects: action initiation and subsequent action persistence. However, the evidence for such a full motivational control effect in human goal-d...

Unlabelled: Research shows that stimuli in the environment can trigger behavior via the activation of goal representations. This process can be tested in the Pavlovian-to-Instrumental Transfer (PIT) paradigm, where stimuli can only affect behavior through the activation of the representation of its desired outcome (i.e., the PIT effect). Previous...

Artificial intelligence increasingly plays a crucial role in daily life. At the same time, artificial intelligence is often met with reluctance and distrust. Previous research demonstrated that faces that are visibly artificial are considered to be less trustworthy and remembered less accurately compared to natural faces. Current technology, howeve...

Previous research indicates that the experience of agency over one's actions and movements is influenced by movement predictability as well as movement distance (Hon, Seow, & Pereira, 2018). Addressing previous limitations, we present a compelling test of the relation between movement distance and movement agency. Participants in two studies moved...

Background: Since the outbreak of the COVID-19 pandemic, physical distancing and hand washing have been used as effective means to reduce virus transmission in the Netherlands. However, these measures pose a societal challenge as they require people to change their customary behaviours in various contexts. The science of habit formation is potenti...

Background: Building on Milgram’s obedience research (Milgram, 1963), previous research suggests that coerced (vs. free choice) actions to harm others reduces the sense of agency, as measured by the temporal binding of actions and outcomes (Caspar et al., 2016). This evidence for the relation between coercion and sense of agency was collected in a...

Background: The ability of making one’s own choices is at the essence of experiences of voluntary behavior. Recent research have started to explore how limitations in personal choice reduces the sense of agency, i.e., the nonconceptual and prereflective part of a person’s feeling of being the author of her own actions and resulting outcomes. The fi...

Artificial intelligence plays a crucial role on our daily lives. At the same time, artificial intelligence is often met with reluctance and distrust. Previous research demonstrated that faces that are visibly artificial are considered to be less trustworthy and remembered less accurately compared to natural faces. Current technology, however, enabl...

A major part of our daily activities is goal-directed and tends to become a habit after practice. Practice makes perfect. In terms of the ideomotor (IM) principle, merely thinking of an outcome can automatically trigger the action associated with it. Contrary to prior IM evidence, the present findings present the alternative view that propositions...

People form coherent representations of goal-directed actions. Such agency experiences of intentional action are reflected by a shift in temporal perception: self-generated motor movements and subsequent sensory effects are perceived to occur closer together in time—a phenomenon termed intentional binding. Building on recent research suggesting tha...

The experience of being an intentional agent is a key component of personal autonomy. Here, we tested how undermining intentional action affects the sense of agency as indexed by intentional binding. In three experiments using the Libet clock paradigm, participants judged the onset of their action (key presses) and resulting effect (auditory stimul...

Effective human action is dependent on goals that are cued in the environment. A major challenge in examining the environmental control of goal-directed behavior concerns a proper test of the mediating role of outcome value in cue-driven behavior. Building on the Pavlovian-to-instrumental transfer (PIT) paradigm, in two experiments we tested a nove...

Human habits are widely assumed to result from stimulus-response (S-R) associations that are formed if one frequently and consistently does the same thing in the same situation. According to Ideomotor Theory, a distinct but similar process could lead to response-outcome (R-O) associations if responses frequently and consistently produce the same ou...

Intentional motor actions and their effects are bound together in temporal perception, resulting in the so-called intentional binding effect. In the current study, we address an alternative explanatory mechanism for the emergence of temporal binding by excluding the role of motor action. Employing a sensory-based Libet clock paradigm, we examined t...

Human habits are considered to be an important root of societal problems. The significance of habits has been demonstrated for a variety of behaviors in different domains, such as work, transportation, health, and ecology, suggesting that habits have a pervasive impact on human life. Studying and changing habits in societal context requires a broad...

The human ability to anticipate the consequences that result from action is an essential building block for cognitive, emotional, and social functioning. A dominant view is that this faculty is based on motor predictions, in which a forward model uses a copy of the motor command to predict imminent sensory action-consequences. Although this account...

Awareness of action is a pervasive personal experience that is crucial in understanding self-generated and other-generated actions as well as their effects. A large body of research suggests that action awareness, as measured by the magnitude of temporal binding between an action and its effect in an operant action task (i.e., intentional binding),...

Background: Schizophrenia is a disorder of basic self-disturbance. Evidence suggests that people with schizophrenia may have aberrant experiences of body ownership: they may feel that they are not the subject of their own body experiences. However, little is known about the development of such disturbances. Methods: Using a rubber hand illusion...

Four experiments examined whether reactions to mental imagery can be reduced by the mindfulness component of decentering, that is, the insight that experiences are impermanent mental states. In Experiments 1a, 1b, and 1c, participants vividly imagined an unpleasant autobiographical event or a rewarding food. When instructed to adopt a decentering p...

Background Without thinking we accept that we possess a body with which we act upon the world. The feeling of mineness that we perceive toward our body parts, our thoughts and our feelings is referred to as sense of ownership (SoO), whereas sense of agency (SoA) refers to the experience of being the agent of own action and subsequent outcomes. Pati...

Schizophrenia patients have difficulties recognizing emotional states from faces, in particular those with negative valence, with severe consequences for daily life. What do these patients see in their minds eye, when they think of a face expressing a particular emotion or trait? The content of such mental representations can shed light into the na...

Reverse correlation is an influential psychophysical paradigm that uses a participant’s responses to randomly varying images to build a classification image (CI), which is commonly interpreted as a visualization of the participant’s mental representation. It is unclear, however, how to statistically quantify the amount of signal present in CIs, whi...

The way humans perceive the outcomes of their actions is strongly colored by their expectations. These expectations can develop over different timescales and are not always complementary. The present work examines how long-term (structural) expectations – developed over a lifetime - and short-term (contextual) expectations jointly affect perception...

Abstract Four experiments examined whether reactions to mental imagery can be reduced by the mindfulness component of decentering, i.e. the insight that experiences are impermanent mental states. In Experiment 1, participants vividly imagined an unpleasant autobiographical event (1a, 1b) or a rewarding food (1c). When instructed to adopt a decenter...

Introduction: Schizophrenia patients have difficulties recognizing emotional states from faces, with severe consequences for daily life. What do these patients see in their minds eye, when they think of a face expressing a particular emotion or trait? The content of such mental representations can shed light into the nature of their deficits, but a...

Sounds that result from our own actions are perceptually and neurophysiologically attenuated compared to sounds with an external origin. This sensory attenuation phenomenon is commonly attributed to prediction processes implicated in motor control. However, accumulating evidence suggests that attenuation effects can also result from prediction proc...

Previous research shows that agency experiences are reduced when response selection is dysfluent. Expanding on this work, we report two experiments addressing the influence of Simon response conflict on agency. Participants responded to congruent and incongruent Simon task trials and indicated their experienced agency after each response. Results s...

Research suggests that cognitive conflict is accompanied by a negative signal. Building on the demonstrated role of negative affect in attitude formation and change, the present research investigated whether the experience of cognitive conflict negatively influences subsequent evaluations of neutral stimuli. Relying on the emergence of conflict in...

Past research suggests that the implicit power motive (i.e., an unconsciously held motivational disposition to derive pleasure from having impact on others) predicts a preference to interact with individuals having submissive-looking faces. The present research extends this finding by testing whether the relation between the implicit power motive a...

Perception is strongly shaped by the actions we perform. According to the theory of event coding, and forward models of motor control, goal-directed action preparation activates representations of desired effects. These expectations about the precise stimulus identity of one’s action-outcomes (i.e. identity predictions) are thought to selectively i...

Background Patients with schizophrenia suffer from fundamental self-disturbances and have difficulties integrating and distinguishing between the self and others. For example, they experience that bodily boundaries vanish, that body parts are located at the wrong part of the body or that they are not the subject of their own movements. Such experie...

Background The ability to perceive, recognize and process own and others’ emotions is crucial for efficient and effective social communication. Many different tasks have been used to investigate impairments herein in patients with schizophrenia. Evidence suggests that perception, discrimination and recognition of affective facial expressions are im...

Reverse correlation is an influential psychophysical paradigm that uses participant’s responses to randomly varying images to build a Classification Image (CI), which is commonly interpreted as a visualization of a participant’s mental representation. It is unclear, however, how to statistically quantify the amount of signal present in CIs, which l...

In this chapter, we address the mechanisms of habit to promote a better understanding and examination of how habits are learned and maintained in humans. Because habits are often conceived of as automated behaviours resulting from learning and practice, we start with the typical features that represent automatic processes. Next, we discuss how habi...

Analyses are mostly executed at the population level, whereas in many applications the interest is on the individual level instead of the population level. In this paper, multiple N = 1 experiments are considered, where participants perform multiple trials with a dichotomous outcome in various conditions. Expectations with respect to the performanc...

A new theory of eating regulation is presented to account for the over-responsiveness of restrained eaters to external food-relevant cues. According to this theory, the food intake of restrained eaters is characterized by a conflict between two chronically accessible incentives or goals: eating enjoyment and weight control. Their difficulty in weig...

Previous research suggests that people's representations of alcoholic beverages play an important role in drinking behavior. However, relatively little is known about the contents of these representations. Here, we introduce the property generation task as a tool to explore these representations in detail. In a laboratory study (N = 110), and a bar...

The sense of agency refers to feelings of causing one's own action and resulting effect. Previous research indicates that voluntary action selection is an important factor in shaping the sense of agency. Whereas the volitional nature of the sense of agency is well documented, the present study examined whether agency is modulated when action select...

Background: The sense of self-agency, i.e., experiencing oneself as the cause of one's own actions, is impaired in patients with schizophrenia. Normally, inferences of self-agency are enhanced when actual outcomes match with pre-activated outcome information, where this pre-activation can result from explicitly set goals (i.e., goal-based route) o...

Purpose of review: Mindfulness-based interventions are becoming increasingly popular as a means to facilitate healthy eating. We suggest that the decentering component of mindfulness, which is the metacognitive insight that all experiences are impermanent, plays an especially important role in such interventions. To facilitate the application of de...

Previous research has indicated that implicit motives can reliably predict which behaviors people select or decide to perform. However, so far, the question of how these motives are able to predict this action selection process has received little attention. Based on ideomotor theory, we argue that implicit motives can predict action selection when...

Background: The ability to perceive, recognize and process own and others’ emotions is crucial for efficient and effective social communication. Many different tasks have been used to investigate impairments herein in patients with schizophrenia. Evidence suggests that perception, discrimination and recognition of affective facial expressions are i...

Salivation to food cues is typically explained in terms of mere stimulus-response links. However, food cues seem to especially increase salivation when food is attractive, suggesting a more complex psychological process. Adopting a grounded cognition perspective, we suggest that perceiving a food triggers simulations of consuming it, especially whe...

(PDF)

Experiencing self-agency over one’s own action outcomes is essential for social functioning. Recent research revealed that patients with schizophrenia do not use implicitly available information about their action-outcomes (i.e., prime-based agency inference) to arrive at self-agency experiences. Here, we examined whether this is related to symptom...

Successful social interaction requires the ability to integrate as well as distinguish own and others' actions. Normally, the integration and distinction of self and other are a well-balanced process, occurring without much effort or conscious attention. However, not everyone is blessed with the ability to balance self-other distinction and integra...

People generally experience themselves as the cause of outcomes following from their own actions. Such agency inferences occur fluently and are essential to social interaction. However, schizophrenia patients often experience difficulties in distinguishing their own actions from those of others. Building on recent research into the neural substrate...

Previous research indicates that people can infer self-agency, the experience of causing outcomes as a result of one's own actions, in situations where information about action-outcomes is pre-activated through goal-setting or priming. We argue that goal-based agency inferences rely on attentional control that processes information about matches an...

This chapter discusses to cognitive inferences of self-agency over operant actions and how these inferences can draw upon unconscious (implicit) sources of information. The main processes subsidizing the experience of self-agency are predictive motor processes based on the likelihood that an action produces an effect, and inference processes based...

Most human action is goal-directed, that is, aimed at obtaining desired outcomes. Basically, goal-directed action relies on knowledge about what actions produce a particular outcome and which outcomes are desirable. Research on ideomotor learning provides insight into how action-outcome knowledge is acquired whereas research on incentive learning d...

While action plans and intentions have been considered to be important factors contributing to the personal sense of causation known as agency, the present research is the first to empirically investigate how action plans influence agency. Participants in multiple studies were required to plan or not to plan ahead their actions. Results consistentl...

Weakening belief in the concept of free will yields pronounced effects upon social behavior, typically promoting selfish and aggressive over pro-social and helping tendencies. Belief manipulations have furthermore been shown to modulate basic and unconscious processes involved in motor control and self-regulation. Yet, to date, it remains unclear h...

Shifting attention is an effortful control process and incurs a cost on the cognitive system. Previous research suggests that rewards, such as monetary gains, will selectively enhance the ability to shift attention when this demand for control is explicitly cued. Here, we hypothesized that prospective monetary gains will selectively enhance the abi...

Human reward pursuit is often assumed to involve conscious processing of reward information. However, recent research revealed that reward cues enhance cognitive performance even when perceived without awareness. Building on this discovery, the present functional MRI study tested two hypotheses using a rewarded mental-rotation task. First, we exami...

Building on the recent findings that the experience of self-agency over actions and corresponding outcomes can also rely on cognitive inferential processes, rather than motor prediction processes, this study aims to investigate the brain areas involved in agency inference processing in a setting where action and outcome are independent. Twenty-thre...

Building on the recent finding that agency experiences do not merely rely on sensorimotor information but also on cognitive cues, this exploratory study uses electroencephalographic recordings to examine functional connectivity during agency inference processing in a setting where action and outcome are independent. Participants completed a compute...

A thriving field of inquiry, the psychological science of money has recently witnessed an upsurge in research attention. In the present volume, we bring together and integrate a number of theoretical perspectives on the question of ‘how does money affect people’s mind, brain, and behavior?’ Importantly, we go beyond previous reviews by zooming in o...

Money carries value and drives people's behavior accordingly. But what are the biological and psychological processes that are involved when people strive for, receive, and spend money? While money-related processes have recently received a lot of attention in psychology and neuroscience, this has occurred in a rather fragmented manner. Consisting...

The question of how human performance can be improved through rewards is a recurrent topic of interest in psychology and neuroscience. Traditional, cognitive approaches to this topic have focused solely on consciously communicated rewards. Recently, a largely neuroscience-inspired perspective has emerged to examine the potential role of conscious a...

People often find themselves in situations where the cause of events may be ambiguous. Surprisingly though, the experience of self-agency, i.e., perceiving oneself as the causal agent of behavioral outcomes, appears quite natural to most people. How then do these experiences arise? We discuss common models proposing that self-agency experiences res...

The present study explores whether presenting specific palatable foods in close temporal proximity of stop signals in a go/no-go task decreases subsequent evaluations of such foods among participants with a relatively high appetite. Furthermore, we tested whether any decreased evaluations could mediate subsequent food choice. Participants first rec...

Objective Palatable food, such as sweets, contains properties that automatically trigger the impulse to consume it even when people have goals or intentions to refrain from consuming such food. We compared the effectiveness of two interventions in reducing the portion size of palatable food that people select for themselves. Specifically, the use o...

The present paper aims to advance the understanding of the control of human behavior by integrating two lines of literature that so far have led separate lives. First, one line of literature is concerned with the ideomotor principle of human behavior, according to which actions are represented in terms of their outcomes. The second line of literatu...

Environmental cues of temptation generally frustrate people’s long-term goal attainment. However, recent research suggests that temptation cues promote, rather than hamper long-term goal congruent effects in successful self-regulators. While previous work has started to shed light on the cognitive features of this rise and fall of self-control, the...

Previous research has shown that both consciously and unconsciously perceived monetary rewards lead to enhanced performance on cognitive and physical tasks. The present research investigates whether the value of unconscious (but not conscious) money-cues boosts task performance even when they are not rewards but just stimuli. Experiment 1 showed th...

Theories of eating regulation often attribute overweight to a malfunction of homeostatic regulation of body weight. With the goal conflict model of eating, we present a new perspective that attributes the difficulty of chronic dieters (i.e., restrained eaters) in regulating their food intake to a conflict between 2 incompatible goals-namely, eating...

What happens when people experience a reduced sense of personal control? Among the various strategies to defend against a perception of randomness, people may show an increased acceptance of external sources of control. Indeed, in one of the most classic studies in social psychology, Stanley Milgram referred to an “agentic shift”—the tendency to re...

Background: People usually feel they cause their own actions and the consequences of those actions, i.e., they attribute behavior to the proper agent. Research suggests that there are two routes to the experience of self-agency: 1) an explicit route, where one has the intention to obtain a goal (if it occurs, I must have done it) and 2) an implici...

Exposure to palatable foods in the environment can trigger impulsive reactions to obtain them, which may lead to unhealthy food choices and eating behaviour. Two studies tested the fundamental question whether impulsive unhealthy food choices can be altered by means of linking unhealthy palatable foods to behavioural stop signals. Study 1 adopted a...

Experimental research in psychology has discovered that human goal pursuit originates and unfolds in the unconscious. Our behavior is directed and motivated by goals outside of conscious awareness in the current situation or environment. In this chapter we review past and current research that examines these goal-priming effects. Our review is orga...

The sense of self-agency is a pervasive experience that people infer from their actions and the outcomes they produce. Recent research suggests that self-agency inferences arise from an explicit goal-directed process as well as an implicit outcome-priming process. Three experiments examined potential differences between these 2 processes. Participa...

In everyday life contexts and work settings, monetary rewards are often contingent on future performance. Based on research showing that the anticipation of rewards causes improved task performance through enhanced task preparation, the present study tested the hypothesis that the promise of monetary rewards for future performance would not only in...

Research has shown that high vs. low value rewards improve cognitive task performance independent of whether they are perceived consciously or unconsciously. However, efficient performance in response to high value rewards also depends on whether or not rewards are attainable. This raises the question of whether unconscious reward processing enable...

The authors examined whether creating associations between products and anger, a negative but also approach-related emotion, motivates people to get or invest in these products when these products are considered attainable. Experiment 1 demonstrated that participants spontaneously spent more physical effort to get anger-related (compared to neutral...

Building on research on unconscious human goal pursuit and the dynamic nature of our mental and physical world, this study examined the idea that an unconsciously activated goal hijacks executive control for its own attainment. This "hijacking" of the executive function by an unconscious goal should be evidenced by impaired performance on an unrela...

Human reward pursuit is often found to be governed by conscious assessments of expected value and required effort. Yet research has also indicated that rewards are initially valuated and processed outside of awareness by rudimentary brain structures. Building on both of these findings, we propose a new framework for understanding human performance...