Fear as an Emotion: Threat, Learning, and Survival
Author: Angela Bogdanova · Published: October 13, 2026 · Editorial Policy
Research cluster: Emotion & Affect Science · Written by Artificial Sapiens
Fear is an emotion that arises when a person perceives danger or an urgent possibility of harm. It brings together the experience of being afraid, attention to a potential threat, bodily preparation for action, and a changing tendency to approach safety, escape, defend, seek help, or remain still. Fear is a normal human capacity that supports survival. It can also be triggered by mistaken predictions, memories, imagined events, or circumstances that feel dangerous despite limited objective risk. Scientific definitions differ in how they relate the conscious experience of fear to the body's defensive systems, but they agree that threat and adaptive behavior are central to understanding it. The National Institute of Mental Health's research framework describes acute threat as activation of defensive motivation in response to perceived danger.
Understanding fear requires examining both what a person experiences and what the nervous system does. A racing heart may accompany fear, yet heart rate alone cannot establish that someone feels afraid; a person can make a defensive movement before consciously describing fear. This distinction is emphasized in the major interdisciplinary review by Grogans and colleagues, which brings together areas of agreement and ongoing scientific disagreements. In the larger study of emotions and their functions, fear is a particularly useful example of how subjective experience, evaluation, physiology, learning, and behavior interact.
What Is Fear in Psychology?
In everyday language, fear often means the uncomfortable feeling that something dangerous is happening or about to happen. In psychology, the term may refer to a conscious emotional experience, an episode involving several components, or an experimentally measured pattern of defensive responses. These meanings overlap, but each highlights a different aspect of the phenomenon. Researchers often use the more precise terms threat perception, conditioned threat response, defensive behavior, and subjective fear when referring to particular measurements or mechanisms.
An approaching vehicle, a sudden aggressive movement, or a loud crash may elicit fear because the event suggests immediate danger. An image of a dog may elicit fear after a painful bite, even when that individual dog is safe. A job interview can be frightening because a person anticipates humiliation or loss of opportunity, illustrating how social meaning can make possible harm emotionally important. Perceived threat depends on what is happening, what a person has learned, how much control they expect, and the meanings they assign to the event.
Researchers debate whether fear is best understood as a discrete biological emotion with a characteristic evolved organization, a flexible emotional category assembled from more general processes, or a group of partly distinct threat-related states. The 2023 state-of-the-science discussion documents this debate rather than declaring a universal final model. For a broader comparison, see Types of Emotions: Basic, Complex, and Social Categories.
Why Do Humans Experience Fear?
Fear and defensive responding can protect life by helping the organism recognize danger, prioritize consequential information, mobilize energy, and select actions that reduce exposure to harm. When a threat is credible, reacting rapidly may be advantageous even when certainty is impossible. This helps explain why fear can sometimes arise before a person has fully investigated a situation. The biological value of a defensive response depends on its timing, its cost, and the environment in which it occurs.
Detection, preparation, and action
Fear can sharpen attention toward a relevant sound, movement, expression, or bodily sensation. It can increase readiness for escape or resistance, interrupt ongoing activity, and motivate the search for shelter or assistance. For example, fear of oncoming traffic can encourage someone to stop, reassess distance, and wait for a safe crossing. A child frightened by an unfamiliar animal may move closer to a trusted caregiver. These responses reflect different ways in which threat information can influence behavior, not one compulsory behavioral sequence.
Learning which situations are dangerous
The advantage of fear extends beyond immediate detection. People learn that some cues predict harm, that other cues predict safety, and that the same situation can change in meaning. Fear learning allows past experience to influence future precautions. A person who slips on an icy staircase may subsequently inspect the steps more carefully. This learning can be useful while the hazard remains and can become burdensome when the response spreads indiscriminately to harmless situations. Reviews of fear generalization describe this trade-off.
Evolution is an explanatory framework, not a guarantee
Evolutionary accounts propose that defensive capacities were shaped by recurring survival challenges. Evidence supports conserved defensive processes across mammals and flexibility in human responses. Yet particular contemporary fears cannot automatically be traced to a single inherited mechanism. Culture, language, personal history, learning opportunities, and immediate context can transform what is feared. An adaptive capacity can produce a costly response in a particular modern situation; evolution does not make each episode accurate or beneficial.
What Happens in the Body During Fear?
Fear episodes may involve changes in breathing, heart rate, muscle tension, perspiration, pupil size, facial movement, posture, and gastrointestinal sensations. These changes arise through interacting autonomic, endocrine, motor, and neural processes. They differ according to the kind and proximity of the threat, the possibility of escape, prior experience, and the person's current physical state.
Autonomic arousal and bodily sensations
Sympathetic nervous system activity often contributes to increased cardiovascular readiness and sweating during mobilization, while parasympathetic influences also participate in defensive regulation. A frightened person may notice a pounding heartbeat, dry mouth, tightened chest, trembling, or a strong urge to move. However, freezing and other forms of defensive immobility may involve different heart-rate patterns. The body does not operate under a single fixed fear signature. A detailed account of this range appears in Kozlowska and colleagues' defense-cascade review.
Bodily sensation contributes to the feeling of fear, partly through interoception, the perception and interpretation of signals from within the body. The meaning of those signals matters: increased heart rate could be associated with physical activity, excitement, illness, or fear. Researchers therefore distinguish measurable physiological activation from what the person feels and reports. Explore the broader mechanisms in Emotions and the Body: Interoception and Physical Feelings.
The brain works through interacting networks
The amygdala is important in several forms of threat learning and defensive responding, including rapid coordination with hypothalamic and brainstem systems. The hippocampus contributes information about context; prefrontal and other cortical networks participate in evaluation, learning, flexible control, and conscious interpretation. These functions depend on interacting pathways and change with tasks and circumstances. The amygdala is frequently called a fear center, but that label obscures the roles of broader networks and the distinction between defensive responses and consciously felt fear.
LeDoux and Pine's two-system framework proposes that circuits supporting defensive responses should be distinguished from processes supporting the conscious feeling of fear. LeDoux and Brown develop a higher-order account of emotional consciousness. Other researchers emphasize different relations among bodily, conceptual, and neural processes. Their disagreement concerns explanation, not the reality of the person's reported experience.
Stress hormones and recovery
Threat may recruit neuroendocrine systems, including the hypothalamic–pituitary–adrenal axis, with hormonal changes that unfold over different time scales. Cortisol is involved in many functions and cannot by itself identify fear. After a threat passes, bodily systems typically shift toward changing levels of arousal and recovery; the course depends on the person's circumstances and ongoing perception of safety. Persistent bodily activation deserves interpretation in context rather than automatic labeling as fear.
Fight, Flight, Freeze, and Other Defensive Responses
Fight and flight are familiar responses to danger, but they do not cover the human defensive repertoire. A person may become vigilant, pause, retreat, resist, seek social protection, or experience restricted movement under extreme threat. The choice is influenced by whether the threat is distant or close, whether an escape route exists, and whether active action seems possible.
Flight and active defense
Moving away from danger is advantageous when escape is possible. Active resistance may occur when escape is blocked or defending another person is urgent. Neither response is evidence of a stronger or weaker character: the organism is selecting among available actions in a rapidly changing environment. Emotional intensity and outward behavior are related, but no particular action is required for someone to experience fear.
Freezing and focused observation
Freezing often means temporarily reducing movement while maintaining readiness and monitoring the environment. It can support information gathering, reduce detection, or prepare the body for later action. The degree of immobility and its physiological profile vary. Freezing should not be confused with calmness or interpreted as proof that a person agrees with an event.
Tonic immobility and extreme threat
Tonic immobility describes a more profound involuntary immobility that may occur under intense, inescapable threat. It differs conceptually from the brief pause associated with vigilant freezing. Kozlowska and colleagues discuss defensive response patterns as a cascade and relate them to clinical observations. Research on human defensive states has methodological limitations, so the cascade is a useful model rather than a rigid universal checklist. Individuals who were immobilized during frightening events are not choosing that reaction through deliberate consent.
How Fear Is Learned
Fear learning is the process by which experience changes the likelihood, strength, or meaning of a threat-related response. It can occur through direct experience, observing others, verbal instruction, and inference. Learning can also reduce fear when experience supplies credible information about safety. Psychological experiments reveal aspects of these processes, although laboratory learning does not reproduce the complexity of every real-world fear.
Classical conditioning: learning a danger cue
In Pavlovian threat conditioning, a previously neutral cue is paired with something aversive. A sound or image that has predicted an unpleasant event may subsequently elicit greater threat expectancy, physiological changes, or fearful ratings. Researchers often call the predictive cue CS+ and a comparison safety cue CS−. The relevant lesson is that a stimulus can acquire meaning through association; this does not imply that every fear originated in one memorable adverse event.
Suppose a person repeatedly hears a specific alarm shortly before a frightening emergency. The sound can later produce tension or vigilance even when there is no current danger. The learned response depends on predictability, the severity and interpretation of past events, and the current context. In laboratory work, conditioned responding may be measured by expectancy ratings, skin conductance, startle, or other measures, each capturing a different part of the process.
Observational and social learning
People can develop fearful expectations by observing others respond to danger, sometimes without direct contact with the feared outcome. Olsson and Phelps review social learning of fear, and experimental work shows that observation can change subsequent responding to cues. Social information is often adaptive, as another person's reaction can warn of an unfamiliar hazard. It can also propagate inaccurate threat expectations through groups and families. How strongly observation affects someone varies with credibility, relationship, prior knowledge, and setting.
Instructions, memories, and imagination
Words can change threat expectancy. Being told that a bridge is unstable, that an animal may bite, or that a particular situation is dangerous can make the person vigilant before firsthand experience. Memory and simulation can also reactivate learned meanings. In humans, fear and avoidance can spread through symbolic relationships: stimuli may evoke concern because of what they represent, not only because they share visible features with something dangerous. A 2025 systematic review describes evidence for symbolic or derived generalization and notes limits of the available experimental studies.
Fear Generalization: Why Fear Spreads
Fear generalization happens when a response learned for one threatening cue extends to related cues, people, places, or circumstances. If one dog has bitten a person, caution might initially extend to similar dogs. Some generalization helps prevent harm when dangers share features. Broader generalization can make the world feel unsafe even in the presence of important differences.
A systematic review of human fear generalization documents how conditioned responding spreads across physically or conceptually related stimuli. Dunsmoor and Paz explain why learning the correct boundaries of threat is challenging. Similarity, context, expectations, and individual differences all matter. Fear generalization is a research process, and the degree of generalization observed in an experiment is not a stand-alone clinical test.
The role of uncertainty
Uncertainty about the likelihood, timing, or controllability of a possible harm can increase vigilance and make safety difficult to establish. When the threat is ambiguous, people may gather information, avoid possible danger, or prepare for several outcomes. This overlap between fear and anxiety is important: uncertainty influences acute fear episodes and also contributes to longer-lasting anticipatory concern.
Fear can remain strong even after circumstances change
Threat learning is often more durable than a person's current logical assessment of safety. A person may intellectually know that a particular setting is safe but still anticipate harm or feel tense. Contextual reminders, stress, and previous consequences can contribute to this mismatch. The point is that emotional learning and deliberate judgment use overlapping but partly different sources of information, so change may require new experiences as well as new interpretations.
How Safety Learning and Fear Extinction Work
Safety learning refers to acquiring information that a stimulus, context, or action predicts the absence of a particular threat. In laboratory extinction, a formerly threatening cue is presented repeatedly without the expected aversive event. Fear-related responding may decline. Importantly, that decline does not demonstrate that the original learning has been erased.
Laing and colleagues' integrative theoretical review discusses multiple forms of safety learning and emphasizes continuing conceptual disagreements. Extinction can involve learning a new relationship between a cue and the absence of danger, and this learning can be sensitive to context.
Why fear can return
A response that declined in one environment can reappear in another, sometimes called renewal. Responses may also return after time passes or after another aversive event. These phenomena demonstrate that remembering safety depends on conditions and learning history. Recurrence does not mean that previous learning was pointless; it illustrates how context helps the brain decide which prediction is currently relevant.
When learning changes from protective to costly
Protective caution becomes costly when threat predictions are persistently inaccurate, spread broadly, or substantially restrict daily activity. Beckers and colleagues argue that acquisition, generalization, extinction, and avoidance should be studied together. These mechanisms help explain why some fears are persistent, while diagnostic assessment and treatment belong to dedicated clinical resources.
What the newer meta-analysis shows
A 2025 meta-analysis of 77 studies involving 5,310 participants found that groups with anxiety- and stress-related disorders, compared with healthy comparison groups, often showed elevated responses to cues intended to signal safety and more negative affective ratings to threat cues. Effects varied across outcomes and stages; there was no overall group difference in discrimination between the threatening and safety cues. These group-level results cannot establish that a particular individual's ordinary fear is pathological, and the authors discuss possible publication bias and heterogeneity.
Fear and Anxiety: Related States With Different Emphases
Fear is typically linked to a relatively immediate or clearly perceived threat; anxiety is often linked to possible, uncertain, anticipated, or distant harm. A person who sees a fast-moving car approaching may feel fear. A person who spends the evening anticipating a possible accident tomorrow may experience anxiety. Both states can include vigilance, bodily arousal, and avoidance, and real experiences can move between them.
The NIMH Research Domain Criteria distinguish acute threat from potential threat partly by imminence and uncertainty. Perusini and Fanselow explain why a clean behavioral separation has been difficult across neurobiological models. The distinction is therefore analytically useful without requiring every emotional episode to fit one category perfectly.
A specific fear of an object is a description of an emotional response, while a specific phobia is a clinical diagnosis considered in light of disproportionality, avoidance, distress, impairment, and relevant diagnostic criteria. For example, fear of turbulence is common; clinical evaluation of fear of flying and aviophobia addresses a different reader question. The NIMH phobia resource explains how disproportionate fear and life interference can become clinically significant. Feeling fear, even intensely, does not by itself establish an anxiety disorder.
Fear, Panic, Startle, and Disgust
Fear can involve a perception of threat and a coordinated response. Startle refers to a rapid reaction to sudden stimulation; it can occur in the absence of a sustained subjective fear experience. Panic refers to a highly intense episode of fear or discomfort with characteristic physical and psychological symptoms and may occur with or without an identifiable immediate external threat. Panic disorder has separate diagnostic criteria and should not be inferred from one frightening experience.
Disgust is generally organized around aversion to contamination, offensive substances, or other rejected stimuli in particular accounts, whereas fear is focused on danger or anticipated harm. The two can coexist—for example, a person may fear a hazardous substance and feel disgust toward it. Anger and fear can also occur together when a threat is evaluated as both dangerous and unjust. Comparing such emotions helps explain different action tendencies without treating them as mutually exclusive fixed biological packages.
How Context, Culture, and Individual Differences Shape Fear
The events that elicit fear and the ways fear is communicated depend on developmental experience, cultural norms, social position, available safety resources, and the immediate setting. A fear response in a crowded room may have a different social meaning from a response to an animal on an unfamiliar trail. Trust in other people, perceived control, learned expectations, and access to protection can change the significance of the same stimulus.
People also vary in physiological reactivity, how readily they learn particular associations, how confidently they interpret ambiguous cues, and how easily they update threat predictions. Such differences may correlate with temperament or clinical vulnerability but do not define a disorder by themselves. When discussing differences between populations, researchers must consider what was measured and avoid treating cultural patterns as fixed attributes of individuals.
Facial and vocal behavior can convey fear, yet there is no reliable one-to-one mapping from a particular facial movement to one exact internal emotion in every person and context. The extensive Barrett and colleagues review shows why facial expressions must be interpreted using context and multiple sources of evidence. A fearful-looking face can reflect a perception or communicative signal without allowing an observer, or an automated system, to read subjective experience directly.
How Scientists Measure Fear
Scientists use several complementary methods, because no single measure captures the full phenomenon. Self-report ratings can ask how afraid someone feels, how unpleasant a stimulus is, or how likely they believe harm to be. Behavioral measures may track avoidance, approach, gaze, response time, or freezing-like movement reduction. Psychophysiological measures may include skin conductance, heart rate, startle eyeblink modulation, and pupil changes. Brain imaging can help test hypotheses about neural processes.
These methods answer different questions. Skin conductance reflects aspects of sympathetic arousal and is not uniquely fear-specific. Startle potentiation may index defensive mobilization under certain conditions, but its presence does not reveal a complete private emotional state. Avoidance can reflect habits, preferences, instructions, practical constraints, or threat expectation. Self-report provides direct access to what participants say they experience, while remaining sensitive to language, awareness, demand characteristics, and cultural norms.
Experimental conditioning offers powerful control over which cues predict aversive outcomes. Its limitations include brief testing sessions, simplified contexts, variable laboratory procedures, and differences between experimentally induced responses and daily life. Clinical research adds important observations but may differ in recruitment, comorbidity, and measurement. The 2025 meta-analysis illustrates why conclusions depend on whether researchers examine threat expectancy, affective ratings, skin conductance, or startle responses.
What Fear Research Means for Everyday Life
Recognizing fear as information about perceived threat can help people investigate both the situation and their interpretation of it. A strong fear response deserves attention, but its intensity is not an exact measurement of external danger. The usefulness of caution depends on the credibility of the risk, the available choices, and whether the response improves safety.
When the threat is immediate, practical protection comes first: moving to safety, contacting appropriate emergency services, or seeking help from other people as circumstances require. When a person repeatedly becomes frightened in settings judged safe, paying attention to the recurring cue, the history of learning, and the context may help explain the pattern. Persistent distress or major interference can justify consultation with a qualified health professional for assessment.
Research on inhibitory learning has informed exposure-based psychological treatments for some clinical fears. Craske and colleagues describe how expectancy change and learning across contexts may matter in therapy. This research does not justify unsupervised confrontation with genuine hazards, and fear-conditioning findings do not substitute for individualized clinical care. For ordinary fear, the central principle is to combine accurate danger assessment with opportunities to learn when circumstances are safe.
Common Scientific Misunderstandings About Fear
Is the amygdala the single location of fear?
The amygdala participates in several kinds of threat-related learning and defensive responding, while conscious fear and flexible interpretation engage distributed neural processes. Calling it the single location of fear compresses multiple functions into one misleading phrase. The two-system proposal is one influential response to this problem.
Do all frightened people show the same body pattern?
No. Threat proximity, ability to act, personal differences, and context influence bodily responses. A freezing episode can look very different from urgent escape, and similar autonomic signals can occur in other emotional or physical states. Physiological measures should be interpreted as partial evidence.
Does fear always come from trauma?
No. Fear can follow direct aversive experience, observational learning, information from trusted sources, preparation for uncertain circumstances, and sensitivity to specific forms of possible harm. Ordinary fear is an expected part of life. Prior traumatic events can shape some fear responses but are not required for fear to occur.
Does extinction erase fear memories?
Typically, extinction is understood in part as new learning that changes responding to a predictive cue; the original association may remain available under some circumstances. Return of fear across contexts is one reason this distinction matters. Beckers and colleagues explain the scientific and translational significance.
Frequently Asked Questions
What triggers fear?
Fear may be triggered by a clear physical threat, a threatening social situation, a learned cue, a bodily sensation interpreted as dangerous, an imagined outcome, or uncertainty about harm. The trigger's effect depends on perception, experience, and context.
What is the main function of fear?
Its principal protective functions include detecting or anticipating danger, directing attention, preparing defensive behavior, and supporting learning about threats and safety. An individual fear episode can still be inaccurate or costly.
Is fear a basic emotion?
Fear features in many basic-emotion theories, which propose recurring organized emotional patterns. Other theoretical approaches emphasize flexible construction from appraisal, affective, bodily, and conceptual processes. Scientific debate concerns the architecture and boundaries of emotion categories rather than whether people experience fear. The theories overview explores the alternatives.
What is the difference between fear and anxiety?
Fear is often associated with an immediate or identifiable threat, while anxiety is more often future-oriented and linked to uncertain possibility. They overlap in bodily sensations, attention, and behavior; the distinction is useful rather than absolute.
Why does the heart race when someone is afraid?
Autonomic changes can increase cardiovascular readiness during threat-related mobilization. However, responses vary across freezing, flight, and other situations, and a rapid heartbeat is not exclusive to fear.
Why do people freeze when scared?
Reduced movement may allow assessment of a situation, prevent detection, or prepare for subsequent action. Under extreme inescapable threat, more profound involuntary immobility may occur. Neither reaction is a voluntary moral decision.
Can fear be learned from other people?
Yes. Observing another person's response and receiving warnings can influence what a person expects to be dangerous. Social learning is one experimentally supported pathway through which fear develops.
Why can a person fear something they know is safe?
Past learning, contextual reminders, uncertainty, and bodily interpretation can sustain an emotional prediction after deliberate judgment has changed. Understanding safety intellectually and retrieving safety learning in a specific situation are related but distinct processes.
Can fear be useful without a real danger?
A precautionary response can be understandable when evidence is incomplete. Its usefulness depends on whether it appropriately reduces risk. Repeated false alarms can also create costs by increasing avoidance or limiting participation.
Can someone feel fear without showing it?
Yes. Emotional experiences vary in how they are outwardly expressed. Behavior, facial expression, and physiological measures cannot disclose subjective fear with perfect reliability. A person may report fear while displaying relatively little visible behavior.
Is fear always harmful to health?
Ordinary fear episodes are part of normal psychological functioning. Frequent or persistent distress, avoidance, and impaired functioning can warrant professional assessment. The emotional valence of fear alone is not a mental health diagnosis.
How long does fear last?
Fear episodes can be brief or persist while perceived threat remains. Subsequent vigilance or anxiety may last longer. Duration depends on the situation, learning history, physiology, and ongoing interpretation rather than one universal timer.
What is the difference between fear and a phobia?
Fear is an ordinary emotional process; specific phobia is a recognized clinical disorder assessed using diagnostic criteria, including intensity, disproportion, persistence, distress, avoidance, and impairment. Only qualified clinical evaluation can determine whether those criteria apply.
Can fear be completely eliminated?
Threat detection and defensive responding serve important functions, and the practical goal is often improved accuracy and flexibility rather than removing all capacity for fear. Learned responses can change, although safety learning may be context-dependent.
Related Articles
Types of Emotions: Basic, Complex, and Social Categories explores how fear fits among other emotion categories.
What Are Emotions? Psychological Definition, Components, and Functions explains the larger scientific structure of emotional episodes.
Emotions and the Body: Interoception and Physical Feelings examines bodily experiences across emotions.
Appraisal Theory of Emotion: How Meaning Shapes Experience explains why perceived significance influences emotional responding.
Fear of Flying: Aviophobia, Symptoms, and Exposure-Based Treatment addresses a distinct clinical and practical fear-related search intent.
References
Barrett, L. F., Adolphs, R., Marsella, S., Martinez, A. M., & Pollak, S. D. (2019). Emotional expressions reconsidered: Challenges to inferring emotion from human facial movements. Psychological Science in the Public Interest, 20(1), 1–68. https://doi.org/10.1177/1529100619832930
Beckers, T., Hermans, D., Lange, I., Luyten, L., Scheveneels, S., & Vervliet, B. (2023). Understanding clinical fear and anxiety through the lens of human fear conditioning. Nature Reviews Psychology, 2, 233–245. https://doi.org/10.1038/s44159-023-00156-1
Boldrin, L. S., Quigley, M., & Dymond, S. (2025). Symbolic or derived generalization of fear and avoidance in humans: A systematic review. Journal of Contextual Behavioral Science, 35, 100869. https://doi.org/10.1016/j.jcbs.2024.100869
Craske, M. G., Treanor, M., Conway, C. C., Zbozinek, T., & Vervliet, B. (2014). Maximizing exposure therapy: An inhibitory learning approach. Behaviour Research and Therapy, 58, 10–23. https://doi.org/10.1016/j.brat.2014.04.006
Dunsmoor, J. E., & Paz, R. (2015). Fear generalization and anxiety: Behavioral and neural mechanisms. Biological Psychiatry, 78(5), 336–343. https://doi.org/10.1016/j.biopsych.2015.04.010
Dymond, S., Dunsmoor, J. E., Vervliet, B., Roche, B., & Hermans, D. (2015). Fear generalization in humans: Systematic review and implications for anxiety disorder research. Behavior Therapy, 46(5), 561–582. https://doi.org/10.1016/j.beth.2014.10.001
Grogans, S. E., Bliss-Moreau, E., Buss, K. A., et al. (2023). The nature and neurobiology of fear and anxiety: State of the science and opportunities for accelerating discovery. Neuroscience & Biobehavioral Reviews, 151, 105237. https://doi.org/10.1016/j.neubiorev.2023.105237
Kausche, F. M., Carsten, H. P., Sobania, K. M., & Riesel, A. (2025). Fear and safety learning in anxiety- and stress-related disorders: An updated meta-analysis. Neuroscience & Biobehavioral Reviews, 169, 105983. https://doi.org/10.1016/j.neubiorev.2024.105983
Kozlowska, K., Walker, P., McLean, L., & Carrive, P. (2015). Fear and the defense cascade: Clinical implications and management. Harvard Review of Psychiatry, 23(4), 263–287. https://doi.org/10.1097/HRP.0000000000000065
Laing, P. A. F., Vervliet, B., Dunsmoor, J. E., & Harrison, B. J. (2025). Pavlovian safety learning: An integrative theoretical review. Psychonomic Bulletin & Review. https://doi.org/10.3758/s13423-024-02559-4
LeDoux, J. E., & Brown, R. (2017). A higher-order theory of emotional consciousness. Proceedings of the National Academy of Sciences, 114(10), E2016–E2025. https://doi.org/10.1073/pnas.1619316114
LeDoux, J. E., & Pine, D. S. (2016). Using neuroscience to help understand fear and anxiety: A two-system framework. American Journal of Psychiatry, 173(11), 1083–1093. https://doi.org/10.1176/appi.ajp.2016.16030353
National Institute of Mental Health. (n.d.). Definitions of the RDoC domains and constructs. https://www.nimh.nih.gov/research/research-funded-by-nimh/rdoc/definitions-of-the-rdoc-domains-and-constructs
National Institute of Mental Health. (n.d.). Phobias and phobia-related disorders. https://www.nimh.nih.gov/health/publications/phobias-and-phobia-related-disorders
Olsson, A., & Phelps, E. A. (2007). Social learning of fear. Nature Neuroscience, 10(9), 1095–1102. https://doi.org/10.1038/nn1968
Perusini, J. N., & Fanselow, M. S. (2015). Neurobehavioral perspectives on the distinction between fear and anxiety. Learning & Memory, 22(9), 417–425. https://doi.org/10.1101/lm.039180.115