ACVB Veterinary Behavior key terms

A contingency in which a behavior increases in frequency because it removes or prevents an aversive stimulus. The aversive event is contingent on the response, distinguishing it from punishment, which suppresses behavior by adding an aversive consequence.

Delivery of an aversive stimulus contingent on a behavior, producing a decrease in that behavior's future frequency. Effective only when the punisher is salient, immediate, and consistent, and it carries risks of fear, aggression, and suppression of unrelated behavior.

The procedure of withholding the reinforcer that previously maintained a behavior, leading to a gradual decline in response frequency. Early in the process animals often show an extinction burst of increased variability and intensity before responding diminishes.

Reappearance of an extinguished or conditioned response after a rest period, without further pairing of the conditioned and unconditioned stimuli. It demonstrates that extinction suppresses rather than erases the original learning, which is why relapse is common.

Training an animal to perform a behavior incompatible with fear or arousal while the feared stimulus is present, pairing that stimulus with something the animal values. It is usually combined with gradual exposure and changes the emotional response, not just the outward behavior.

Gradual, repeated exposure to a stimulus at an intensity too low to elicit a full fear response, with intensity increased only as the animal remains calm. The aim is habituation of the emotional response rather than simple repetition of exposure.

Prolonged forced exposure to a feared stimulus at full intensity until the fear response subsides. It is generally considered high-risk in veterinary behavior because it can sensitize rather than habituate, and escape or aggression may occur.

An increase in responsiveness to a stimulus following repeated or intense exposure, often seen when an animal is repeatedly exposed to a fear-eliciting event above threshold. It is the opposite of habituation and can worsen a behavioral problem.

A decrease in response to a repeated, non-consequential stimulus. It is stimulus-specific and reversible, distinguishing it from sensory adaptation or fatigue, and it underlies an animal's ability to ignore routine environmental events.

The rule specifying how and when responses are reinforced, such as continuous, fixed ratio, variable ratio, fixed interval, or variable interval. Intermittent schedules produce more persistent behavior and greater resistance to extinction than continuous reinforcement.

The principle that a higher-frequency behavior can reinforce a lower-frequency behavior, often applied as access to a preferred activity contingent on performing a less preferred one. It is useful for structuring enrichment and training without food.

Learning in which a neutral stimulus acquires the ability to elicit a response by being paired with an unconditioned stimulus. It explains many emotional and physiological responses, including fear associations and conditioned drug effects.

Learning in which behavior is modified by its consequences, such as reinforcement or punishment. The animal's own actions determine the outcome, in contrast to classical conditioning where the stimulus predicts an event regardless of behavior.

A learned, context-dependent relationship in which animals repeatedly defer to others in competition for resources, reducing conflict. In companion animals it is not a fixed personality trait and does not justify coercive training based on 'alpha' status.

A catalog of an animal's behavior patterns with precise operational definitions, used to record and quantify behavior systematically. It is the foundation of observational data collection and behavioral assessment.

A developmental window during which specific experiences, such as exposure to varied social and environmental stimuli, have lasting effects on behavior. In dogs, early socialization is considered a sensitive period rather than a strict all-or-none critical period.

Retention of juvenile morphological and behavioral traits into adulthood, proposed as a feature of dog domestication. It may contribute to prolonged playfulness, reduced aggression, and the extended social receptivity seen in domestic dogs.

The process by which young animals learn to interact appropriately with conspecifics and other species through exposure during sensitive developmental periods. Inadequate socialization is a common contributor to fear and aggression in companion animals.

Behavior such as growling, snapping, or blocking used to retain access to food, toys, resting places, or people. It reflects competition over valued resources and is managed by avoiding provocation and teaching alternative, safer responses.

Aggressive behavior arising from fear or perceived threat, often accompanied by appeasement signals, avoidance, and defensive postures. Treatment focuses on reducing fear through desensitization and counterconditioning and on preventing exposure to triggers.

A distress response in dogs triggered by separation from a specific attachment figure, typically shown as vocalization, destruction, and house soiling that occur mainly in the owner's absence. It is distinguished from other problems by the close temporal link to departure.

An anticipatory emotional state of apprehension and arousal in response to a perceived or anticipated threat, often generalized beyond the original trigger. It differs from fear, which is a response to a present, identifiable danger.

A catecholamine neurotransmitter central to reward, motivation, and motor activity. Altered dopaminergic signaling is implicated in compulsive and stereotypic behaviors, and dopamine pathways are a target in behavioral pharmacology research.

A monoamine neurotransmitter involved in mood, anxiety regulation, aggression, and impulse control. Drugs that increase serotonergic activity, such as selective serotonin reuptake inhibitors, are widely used in veterinary behavioral medicine.

The neuroendocrine system in which hypothalamic corticotropin-releasing hormone stimulates pituitary ACTH release, which drives adrenal cortisol secretion. Chronic activation is a physiological marker of stress and is relevant to welfare assessment.

A glucocorticoid hormone released by the adrenal cortex in response to stress, measurable in blood, saliva, urine, or hair. Its interpretation is complicated by circadian variation, sampling timing, and the distinction between acute and chronic stress.

A class of psychotropic drugs that blocks serotonin reuptake, increasing synaptic serotonin over time. In veterinary behavior it is used for anxiety and related disorders, with effects typically taking several weeks and requiring gradual discontinuation.

A class of older antidepressants that inhibit reuptake of serotonin and norepinephrine and also act on histamine and muscarinic receptors. Side effects and toxicity risks, including cardiac effects, require caution in veterinary patients.

A class of drugs that enhance GABA-A receptor activity, producing anxiolysis, sedation, and muscle relaxation with rapid onset. Risks include tolerance, dependence, paradoxical excitation, and disinhibition of aggression, so use requires careful patient selection.

Gamma-aminobutyric acid, the main inhibitory neurotransmitter in the central nervous system. Drugs that enhance GABAergic transmission, such as benzodiazepines, reduce neuronal excitability and are used for acute anxiety and seizure control.

The systematic process of listing and distinguishing conditions that could explain a patient's signs, including medical, environmental, and behavioral causes. In behavioral medicine it requires ruling out pain, endocrine, neurologic, and sensory disorders before a behavioral diagnosis is made.

The process of excluding underlying physical disease or pain that could produce or worsen the reported behavioral signs. It typically precedes or accompanies behavioral treatment and may include examination, laboratory testing, and imaging.

Repetitive, exaggerated, or out-of-context behaviors such as spinning, flank sucking, or light chasing that persist beyond the original trigger and interfere with normal function. It is considered analogous to obsessive-compulsive disorder in humans.

A repetitive, invariant behavior pattern with no apparent function, often arising in restricted environments and linked to frustration or poor welfare. It is a welfare indicator and may be difficult to reverse once established.

Systematic evaluation of an animal's physical and psychological state using measures such as health, behavior, physiology, and environment. Modern frameworks consider affective states and the animal's ability to perform natural behaviors.

A welfare framework describing freedom from hunger and thirst, discomfort, pain and disease, fear and distress, and freedom to express normal behavior. It is widely used to structure welfare evaluation and identify areas needing improvement.

Systematic error in recording or interpreting behavior because of the observer's expectations, beliefs, or prior knowledge. It is reduced by operational definitions, blinding, and interobserver reliability checks.

The degree to which independent observers agree on recorded behavioral data using the same definitions and methods. It is quantified with statistics such as kappa or intraclass correlation and supports the credibility of observational findings.

An experimental design in which participants are randomly assigned to treatment or control groups to reduce selection bias. In veterinary behavior it is the strongest design for establishing treatment efficacy, though blinding and placebo effects require attention.

An improvement in outcome attributable to expectation, attention, or the treatment context rather than to a specific active treatment. It complicates behavioral trials because owner reporting and handling changes can influence results.