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Bidirectional Relationship
A bidirectional relationship is a mutually influencing connection between two variables, in which each influences the other rather than one simply causing the other.…
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CNP Contributor
Ephi Lu
Related Encyclopedia terms
Cognitive Performance
Cognitive performance in nutritional psychology refers to how efficiently and accurately a person carries out mental tasks — attention, working memory, processing speed, learning…
Read termFood is Medicine
Food is Medicine (FIM) is the provision of healthy food — most often medically tailored meals, medically tailored groceries, and produce prescriptions — to…
Read termInflammatory Bowel Disease
Inflammatory Bowel Disease (IBD) is a group of chronic, immune-mediated inflammatory conditions of the gastrointestinal tract, comprising two main forms: Crohn’s disease, which can…
Read termPsychotherapy
Psychotherapy, also known as “talk therapy,” is a professional, evidence-informed treatment for psychological, emotional, and behavioral difficulties, delivered through a structured therapeutic relationship between…
Read termMinimally Processed Foods
Minimally processed foods are whole or nearly whole foods that have undergone limited industrial processing intended primarily to preserve them, ensure safety, or make…
Read termDiabetes Type II
Type 2 Diabetes (T2D) is a chronic metabolic disorder characterized by persistent hyperglycemia resulting from a combination of insulin resistance and progressive dysfunction of…
Read termSuicidal Ideation
Suicidal ideation refers to thoughts, considerations, or preoccupations with ending one’s own life, ranging from fleeting, passive thoughts (e.g., wishing not to wake up)…
Read termNeurodegeneration
Neurodegeneration is the progressive loss of structure or function of neurons in the central or peripheral nervous system, ultimately leading to neuronal dysfunction and…
Read termBlue Zones
Blue Zones are geographic regions identified by researchers Dan Buettner, Gianni Pes, and Michel Poulain as having unusually high concentrations of individuals who live…
Read termLongevity Diet
The Longevity Diet is a dietary framework developed by biogerontologist Valter Longo and colleagues, designed to promote healthy aging, extend healthspan, and reduce the…
Read termBody Mass Index (BMI)
Body Mass Index (BMI) is a numerical measure of body size calculated as an individual’s weight in kilograms divided by the square of their…
Read termPhytochemicals
Phytochemicals are bioactive, non-nutrient compounds naturally produced by plants as part of their secondary metabolism, primarily serving protective functions for the plant such as…
Read termRestrictive Eating
Restrictive eating is a broad term describing patterns of food intake in which an individual intentionally limits the quantity, variety, timing, or types of…
Read termChrononutrition
Chrononutrition is a field of nutrition science that examines how the timing, frequency, and temporal distribution of food intake interact with the body’s endogenous…
Read termDiagnostic and Statistical Manual of Mental Disorders (DSM)
The Diagnostic and Statistical Manual of Mental Disorders (DSM) is the standard classification system for mental health conditions in the United States, published by…
Read termCognitive Behavioral Therapy
Cognitive Behavioral Therapy (CBT) is a structured, time-limited, evidence-based form of psychotherapy that focuses on the interrelationships among thoughts, emotions, physiological responses, and behaviors,…
Read termCognitive Decline
Cognitive decline refers to a measurable reduction in one or more cognitive abilities — such as memory, attention, executive function, language, learning, judgment, and…
Read termMetabolic Disorders
Metabolic disorders are a broad group of conditions that disrupt the normal biochemical processes by which the body converts food into energy, builds and…
Read termMood Disorders
Mood disorders (also called affective disorders) are a category of psychiatric conditions characterized by marked, sustained disruptions in emotional state — either severe lows…
Read termKetogenic Diet
A ketogenic diet (KD) is a high-fat, very low-carbohydrate, moderate-protein dietary approach designed to induce nutritional ketosis — a metabolic state in which the…
Read termMetabolic Psychiatry
Metabolic Psychiatry is an emerging subspecialty of psychiatry that examines the role of metabolic dysfunction — including impairments in mitochondrial function, insulin signaling, inflammation,…
Read termBinge eating disorder (BED)
Binge eating disorder (BED) is a psychiatric eating disorder marked by recurrent episodes of eating an unusually large amount of food in a discrete…
Read termUltra-Processed Food Addiction (UPFA)
Ultra-processed food addiction (UPFA) is a proposed clinical presentation in which repeated intake of ultra-processed foods (UPFs) — industrial formulations high in refined carbohydrates…
Read termWorld Diet Initiative
The World Diet Initiative (WDI) is a global research consortium, launched in July 2026 by researchers from 12 countries and introduced in Nature Medicine,…
Read termBiopsychosocial Model
biopsychosocial (adj.) — A framework, formalized by George L. Engel in 1977, in which health, illness, and behavior are understood as arising from the…
Read termBody Image
Body image is the multidimensional psychological experience of one’s own body, encompassing perceptions, thoughts, feelings, beliefs, and behaviors related to physical appearance and embodiment.…
Read termHedonic Eating
Hedonic eating refers to food consumption driven by pleasure, palatability, and reward rather than by physiological energy need. It arises when the brain’s reward…
Read termCognitive Performance
The measurable efficiency of mental processes — attention, memory, executive function, processing speed — as shaped by diet, nutrient status, and eating behaviors. What…
Read termIdentity Lag
A psychonutritional phenomenon describing the temporal gap between a person’s changing body, metabolic state, and eating patterns (for example, rapid weight loss or appetite…
Read termInterdisciplinary
In nutritional psychology, interdisciplinary refers to intentionally integrating the psychological sciences (e.g., cognition, emotion, behavior, psychosocial functioning, perception, interoception, mental health) with the nutritional…
Read termAvailability
The term ‘availability,’ categorized within the Diet-Behavior Relationship in nutritional psychology, refers to a determinant of dietary intake behavior: the presence and accessibility of foods in…
Read termSatiety Cascade
The satiety cascade is a conceptual model describing the sequence of physiological and psychological signals that arise during and after eating and that progressively reduce…
Read termPostprandial Somnolence
Postprandial somnolence (often called a “food coma”) is the feeling of drowsiness, mental fogginess, or reduced alertness that occurs after eating, especially after a…
Read termNutrition Transition
Barry Popkin’s “Nutrition Transition” concept refers to the large-scale shifts in populations’ diet and physical activity patterns that occur alongside economic and social change—especially…
Read termNutrition Security
The consistent access, availability, and affordability of foods and beverages that promote well-being and prevent and, if needed, treat disease. Craig, H. C., Sharib,…
Read termHunger
Hunger is a psychological state characterized by a desire to eat (Stevenson, 2024). It strongly motivates an individual to seek out and consume food.…
Read termExternal eating
External eating is the tendency to eat in response to external cues such as the sight, smell, or availability of food rather than internal…
Read termPsychonutritional Education
Psychonutritional education is a term used in the emerging field of nutritional psychology to describe the integration of psychological theories and concepts with scientific…
Read termFood-Extrinsic Factors
Food-extrinsic factors are influences on how people perceive and evaluate a food item that come from outside the food itself. Food-extrinsic factors include food…
Read termFood-Intrinsic Sensory Factors
Food-intrinsic sensory factors are characteristics of a food item that human senses can perceive. These include the color of the food product, its texture,…
Read termAkkermansia
Akkermansia is a genus of beneficial gut bacteria, with Akkermansia muciniphila being the most studied species. It lives in the mucus layer of the…
Read termVisual Satiety
Visual satiety refers to the phenomenon where the pleasantness of a food’s appearance decreases after repeated exposure, even if the taste or smell hasn’t…
Read termPower of Food Scale
The “Power of Food Scale” (PFS) is a psychological assessment tool developed to measure the influence of food availability and its perceived power over…
Read termAppetite
Appetite is the process of hunger arising from learned associations between various cues for food and their consequences. It is one of the two…
Read termFood culture
Food culture refers to the way food is grown, prepared, shared, and consumed, along with the customs that influence these activities.
Read termAtheoretical approach
Atheoretical means “not based on or connected to any specific theory.” In research or academic contexts, if something is described as atheoretical, it means…
Read termCognitive Distortions
Cognitive distortions are irrational, biased, or exaggerated thought patterns that negatively influence perception, decision-making, and emotions. These automatic, often unconscious, thinking errors can reinforce…
Read termAffective Systems
Affective systems refer to the integrated neural, biochemical, and psychological mechanisms responsible for the generation, regulation, and experience of emotions, moods, and feelings. These…
Read termFood Frequency Questionnaire (FFQ)
A Food Frequency Questionnaire (FFQ) is a dietary assessment tool that asks people how often they eat specific foods and beverages over a set…
Read termRelated News articles
Psychological Effects of GLP-1 Medications on Users
Emerging research highlights psychological changes experienced by GLP-1 medication users, emphasizing the need for understanding alongside physical effects.
Read newsMediterranean Diet Linked to Enhanced Psychological Well-Being in Older Adults
A study finds adherence to a Mediterranean diet boosts psychological well-being in adults aged 50+, even during COVID-19 lockdowns.
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