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Floor and Ceiling Effect

Floor and ceiling effects are psychometric phenomena in which a disproportionately large proportion of respondents achieve the lowest (floor) or highest (ceiling) possible score on a measurement scale. These effects compromise scale reliability and responsiveness, limiting the instrument's ability to distinguish among

positive psychology

Flourishing Scale

The Flourishing Scale (FS) is an 8-item measure of human flourishing developed by Diener and colleagues in 2010. It assesses psychological well-being across core dimensions including purpose, social connection, competence, and engagement. The scale operationalizes Aristotle's concept of eudaimonia—the realization of hu

1 fonte2010

occupational health

Flow at Work Scale

The Flow at Work Scale (derived from Csikszentmihalyi's flow theory and operationalized by Bakker as the Work-Related Flow Inventory) measures the degree to which employees experience 'flow'—a state of optimal absorption, focus, and enjoyment in work. Flow is characterized by full concentration, loss of self-consciousn

3 fontes1990

pharmacology

Flow Cytometry

Flow cytometry is a laser-based technology for analyzing and sorting individual cells based on fluorescent markers. Developed by Leonard Herzenberg in the 1970s, flow cytometry enables rapid assessment of cell phenotype, drug effects on cell populations, and therapeutic cell characterization in immunology and hematolog

2 fontes1976

analytical chemistry

Flow Injection Analysis

Flow injection analysis is an automated continuous-flow technique that rapidly injects a sample plug into a flowing stream of carrier solution, where it mixes with reagents and is detected online before reaching the detector. Developed by Jaromir Ruzicka and Elo Hansen in 1975, FIA revolutionized analytical chemistry b

3 fontes1975

nursing

Fluid Balance Monitoring

Fluid Balance Monitoring is a systematic nursing process for tracking and comparing fluid intake and output to maintain adequate hydration and detect abnormalities in fluid status. By measuring all sources of fluid intake (oral, intravenous, enteral feeding) and all routes of fluid loss (urine, feces, perspiration, dra

2 fontes1950

neuroimaging

fNIRS Analysis

Functional Near-Infrared Spectroscopy (fNIRS) is an optical neuroimaging method that measures changes in cerebral blood oxygenation non-invasively from the scalp. Developed by Britton Chance and colleagues in the 1990s, fNIRS combines the portability and cost-effectiveness of EEG with the spatial localization advantage

2 fontes1993

nutritional science

FNS

The Food Neophobia Scale is a 10-item self-report instrument measuring the degree to which individuals are reluctant or fearful of trying new foods. Developed by Pliner and Hobden in 1992, the FNS measures food neophobia—an aversion to unfamiliar foods—which is influenced by both evolutionary factors (caution toward un

2 fontes1992

veterinary science

Focal Animal Sampling

Focal Animal Sampling (FAS) is a systematic observational method in which an observer focuses on one individual animal at a time, recording its behavior continuously or at regular intervals for a fixed period. Introduced by Jeanne Altmann in 1974, FAS provides detailed, quantitative ethograms of individual behavior, ma

3 fontes1974

social media psychology

FoMO Scale

The FoMO Scale is a 10-item self-report instrument that measures the extent to which individuals experience anxiety or apprehension about missing out on social events, experiences, or information shared by others, particularly in social media contexts. Developed by Przybylski and colleagues in 2013, it quantifies this

1 fonte2013

ecology

Food Web Topology

Food web topology analysis characterizes the structure of predator-prey interactions within ecological communities using network metrics. Pioneered by Williams and Martinez (2000) and extended by Dunne and colleagues (2002), this approach maps which species eat which and quantifies network properties (connectivity, clu

sports medicine

Foot and Ankle Outcome Score

The Foot and Ankle Outcome Score (FAOS) is a 42-item patient self-report instrument designed to assess symptoms, function, and activity limitations in individuals with foot and ankle pathology. Developed by Roos and colleagues in 2001 and published in the Journal of Orthopedic & Sports Physical Therapy, the FAOS has be

1 fonte2001

sports science

Force-Velocity Profile

The force-velocity profile characterizes an individual's mechanical properties across the force-velocity spectrum, revealing whether strength advantage lies in maximal force production or high-velocity power output. Formalized by Samozino and colleagues (2012), the FVP is derived from multiple load-velocity measurement

3 fontes2007

forestry

Forest Fire Risk Assessment

Forest fire risk assessment quantifies the probability and potential severity of wildfire in forest ecosystems, integrating stand structure, fuel characteristics, weather patterns, and topography. Developed by Van Wagner, Rothermel, and fire science communities, fire risk models predict fire ignition likelihood, fire b

4 fontes1950

forestry

Forest Vegetation Simulator

The Forest Vegetation Simulator (FVS) is a widely used growth and yield model system developed by the USDA Forest Service that simulates tree and stand development over multiple decades. FVS uses individual-tree growth models (not stand averages) parameterized for different forest regions, allowing realistic simulation

2 fontes1990

accounting

Fraud Risk Assessment

Fraud Risk Assessment is a structured audit methodology required by the American Institute of Certified Public Accountants (AICPA) for identifying and evaluating risks that financial statements could be materially misstated due to fraud. Unlike audit risk assessment focused on error, fraud assessment considers intentio

2 fontes2002

social psychology

Friendship Quality Questionnaire

The Friendship Quality Questionnaire is a self-report instrument designed to assess the quality and characteristics of friendships in children, adolescents, and adults. Developed by Jeffrey Parker and Steven Asher in 1993 and expanded by Bukowski and colleagues, the FQQ measures dimensions of friendship quality includi

2 fontes1993

neuropsychology

Frontal Assessment Battery

The Frontal Assessment Battery (FAB) is a brief, clinician-administered neuropsychological battery designed to assess frontal lobe function and executive abilities at the bedside. Developed by Dubois and colleagues at the Salpêtrière Hospital in Paris in 2000, the FAB consists of six subtests measuring conceptualizatio

horticulture

Fruit Color Analysis

Fruit color analysis employs spectrophotometric measurement to quantify ripeness and quality based on chromatic properties. Using the CIE L*a*b* color space, introduced in 1976, this non-destructive method objectively grades fruit maturity and predicts sensory acceptability. It is widely applied in commercial sorting l

2 fontes1976

rehabilitation

Fugl-Meyer Assessment

The Fugl-Meyer Assessment (FMA) is a comprehensive, clinician-administered scale measuring sensorimotor recovery and motor impairment in stroke patients. Developed by Fugl-Meyer and colleagues in 1975, FMA has become the gold standard outcome measure in stroke rehabilitation research and clinical practice for quantifyi

2 fontes1975

Functional Behavioral Assessment

Functional Behavioral Assessment (FBA) is a systematic process for identifying the environmental and behavioral factors that maintain or contribute to a target behavior. Developed by Richard O'Neill, Robert Horner, and colleagues in the 1990s, FBA is a cornerstone of applied behavior analysis and is widely used in educ

2 fontes1997

ecology

Functional Diversity

Functional diversity quantifies the range and abundance distribution of functional traits (morphology, physiology, behavior) among species in a community. Developed by Mouillot and colleagues (2008), functional diversity indices measure how different species are in their ecological roles and resource use strategies. Un

3 fontes2008

chemistry

Functional Group Identification

Functional group identification is the systematic determination of chemical functional groups present in organic molecules using spectroscopic, chemical, and structural data. Developed throughout the 20th century alongside spectroscopy and analytical chemistry, this methodology enables rapid structure elucidation by fo

2 fontes

physical therapy

Functional Independence Measure

The Functional Independence Measure (FIM) is an 18-item standardized assessment of functional status and disability that measures the level of assistance required for activities of daily living (ADLs) and mobility in individuals with disabilities. Developed by Granger and Hamilton in the 1980s, the FIM has become a sta

2 fontes1984

rehabilitation

Functional Independence Measure Scale

The Functional Independence Measure (FIM) is a comprehensive 18-item scale assessing functional independence and burden of care in patients with disability across motor and cognitive domains. Developed by Granger and colleagues in 1987, FIM has become the standard outcome measure in rehabilitation medicine, mandated by

2 fontes1987

medical imaging

Functional Ultrasound

Functional Ultrasound (fUS) is a high-framerate Doppler ultrasound technique that dynamically maps blood flow and hemodynamic changes in vivo with millisecond temporal resolution. Pioneered by Tanter, Macé, and colleagues in the 2010s, fUS enables real-time imaging of microvascular perfusion in the brain and other orga

3 fontes2011

Fuzzy-Set Qualitative Comparative Analysis

Fuzzy-Set Qualitative Comparative Analysis (fsQCA) is a set-theoretic method developed by Charles Ragin in the early 2000s that combines the configurational logic of qualitative case studies with the mathematical rigor of fuzzy sets. It bridges qualitative and quantitative research by allowing researchers to examine ca

G-Theory

Generalizability Theory, developed by Lee J. Cronbach and colleagues in the 1960s and formalised by Brennan (2001), is an ANOVA-based framework that extends Classical Test Theory by decomposing observed score variance into multiple, separately identified sources of measurement error — such as raters, tasks, occasions,

2 fontes1963

gastroenterology

Gastroparesis Cardinal Symptom Index

The Gastroparesis Cardinal Symptom Index (GCSI) is a validated, patient-reported outcome measure specifically designed to assess symptom severity in gastroparesis. Developed by Revicki and colleagues in 2003, the GCSI captures the three cardinal symptom clusters of gastroparesis: nausea and vomiting, postprandial fulln

1 fonte2003

General Health Questionnaire

The General Health Questionnaire-12 (GHQ-12) is a brief, 12-item self-report screening instrument for psychological distress and mental health problems in the general population. Developed by David P. Goldberg, the GHQ-12 is the most widely used short form of the longer General Health Questionnaire series. It is design

2 fontes1992

social psychology

General Self-Efficacy Scale

The General Self-Efficacy Scale (GSE) is a 10-item measure assessing beliefs in one's ability to handle difficult situations and to cope with challenges through adaptive effort. Developed by Ralf Schwarzer and Matthias Jerusalem in the mid-1990s, the GSE operationalizes self-efficacy as a generalized confidence in one'

3 fontes1995

Generalizability Theory

Generalizability Theory is a psychometric framework that decomposes observed score variance into multiple sources — persons, items, raters, occasions, and their interactions — using analysis of variance. It replaces the single reliability coefficient of classical test theory with a family of coefficients that tell rese

2 fontes1963

Generalized Anxiety Disorder Scale

The Generalized Anxiety Disorder-7 (GAD-7) is a brief, 7-item self-report instrument for screening and assessing the severity of anxiety symptoms in primary care and mental health settings. Developed by Spitzer and colleagues in 2006, the GAD-7 mirrors the structure and validation approach of the widely successful PHQ-

2 fontes2006

Generalized Anxiety Disorder-7

The GAD-7 is a brief 7-item self-report questionnaire designed to screen for and measure the severity of generalized anxiety disorder in adolescents and adults. Developed by Spitzer, Kroenke, Williams, and Löwe in 2006, it has become one of the most widely used anxiety screening tools in primary care, mental health res

1 fonte2006

bereavement psychology

GEQ

The Grief Experience Questionnaire (GEQ) is a multidimensional measure developed by Barrett and Schneweis in 1980 to assess the breadth of emotional, cognitive, and existential experiences reported by bereaved individuals. Rather than focusing on pathology or symptom severity, the GEQ captures the diverse phenomenology

1 fonte1980

gastroenterology

GERD Health-Related Quality of Life Scale

The GERD Health-Related Quality of Life Scale (GERD-HRQL) is a concise, validated patient-reported outcome measure for assessing the symptomatic and functional impact of gastroesophageal reflux disease (GERD). Developed by Velanovich and colleagues in 1996, the 9-item GERD-HRQL measures heartburn frequency and severity

1 fonte1996

environmental engineering

Geriatric Depression Scale

The Geriatric Depression Scale (GDS) is a 30-item self-report depression screening instrument specifically designed for older adults. Developed by Yesavage, Brink, and colleagues in 1982, the GDS addresses the unique presentation of depression in aging populations, where symptoms may differ from younger adults. A valid

2 fontes1982

agronomy

Germination Kinetics Modeling

Germination Kinetics Modeling is a quantitative method used in agronomy, seed science, and crop physiology to describe, predict, and compare the speed and uniformity of seed germination under varying environmental conditions. It draws on thermal time and hydrothermal time frameworks to link temperature, water potential

2 fontes1970

clinical assessment

Glasgow Coma Scale

The Glasgow Coma Scale (GCS), developed by Teasdale and Jennett in 1974, is a 15-point scale used to assess level of consciousness and severity of brain injury. It evaluates eye opening, verbal response, and motor response, making it the gold standard tool for rapid neurological assessment in trauma, emergency, and int

2 fontes1974

clinical assessment

Glasgow-Blatchford Score

The Glasgow-Blatchford score (GBS), developed by Blatchford et al. in 2000, is a 23-point risk stratification tool for predicting the need for intervention (transfusion, endoscopic therapy, surgery) in patients presenting with acute upper gastrointestinal bleeding. It integrates clinical and laboratory data to identify

2 fontes2000

sports medicine

Global Rating of Change Scale

The Global Rating of Change (GRC) Scale is a single-item, self-report outcome measure that asks patients to rate the overall change in their condition since baseline assessment. Developed by Jaeschke, Singer, and Guyatt in 1989 and published in Controlled Clinical Trials, the GRC Scale has become a fundamental method f

1 fonte1989

accounting

Going Concern Evaluation

Going Concern Evaluation is an auditor framework for assessing whether the entity being audited will be able to continue operating and meeting its obligations in the foreseeable future (typically, one year from the financial statement date). Required by auditing standards, this assessment examines financial and operati

2 fontes1988

biomaterials

GPC/SEC

Gel permeation chromatography (GPC), also known as size exclusion chromatography (SEC), is an analytical technique for determining the molecular weight distribution (MWD) and average molecular weight (Mw, Mn) of polymers. The method separates polymer molecules by their hydrodynamic size as they pass through a porous ch

3 fontes1962

environmental psychology

GPIS

The Green Purchase Intention Scale (GPIS) measures consumers' stated willingness and likelihood of purchasing environmentally friendly products, including their intention to pay premium prices for eco-labeled goods and their perceived value of sustainable alternatives. Developed from consumer behavior and willingness-t

3 fontes1991

horticulture

Grafting Success Evaluation

Grafting success evaluation assesses the degree of vascular union formation and physiological compatibility between scion (upper) and rootstock (lower) in grafted plants. This method combines visual inspection of callus development, histological analysis, anatomical measurements, and physiological testing to predict lo

2 fontes1850

neuroimaging

Graph Brain Network Analysis

Graph Theoretical Brain Network Analysis applies network science to understand brain organization, treating the brain as a complex network of interconnected nodes (regions) and edges (connections). Formalized by Bullmore and Sporns in 2009, graph analysis reveals fundamental organizational principles—modularity, effici

2 fontes2009

positive psychology

Gratitude Questionnaire

The Gratitude Questionnaire-Six (GQ-6), developed by McCullough, Emmons, and Tsang in 2002, is a 6-item measure of dispositional gratitude—the tendency to recognize and appreciate the good in one's life. Operationalizing gratitude as a stable personality trait (not just a momentary feeling), the GQ-6 assesses the capac

1 fonte2002

Green Infrastructure Design

Green infrastructure (GI) design is the planning and implementation of natural or nature-based systems (vegetation, soils, water bodies) integrated into urban environments to provide multiple ecosystem services: stormwater management, air quality improvement, heat island mitigation, biodiversity habitat, recreation, an

environmental engineering

horticulture

Greenhouse Climate Control

Greenhouse climate control integrates measurement, modeling, and automated actuation to maintain optimal temperature, humidity, light, and CO₂ concentrations for plant growth. Modern systems use sensors and control algorithms to respond dynamically to external weather and internal plant needs. This approach increases y

2 fontes1990

social psychology

Grit Scale

The Grit Scale is a 12-item measure assessing grit—the combination of perseverance (sustained effort despite obstacles) and passion (consistent interest and commitment) for long-term goals. Developed by Angela Duckworth and colleagues in 2007, the GRIT operationalizes grit as a distinct personality construct predicting

3 fontes2007

geophysics

Ground-Penetrating Radar

Ground-Penetrating Radar (GPR) is a near-surface geophysical method that uses high-frequency electromagnetic pulses (typically 10 MHz to 2.5 GHz) to image shallow subsurface structures with exceptional spatial resolution. Pioneered by Davis and Annan in 1989, GPR is widely used in archaeology, civil engineering, enviro

2 fontes1989

Groundwater Contamination Modeling

Groundwater contamination modeling is a quantitative approach to predict the migration of dissolved and suspended contaminants (chemical spills, landfill leachate, petroleum, radionuclides) through subsurface aquifers and toward receptors (drinking water wells, surface water bodies, ecosystems). Developed systematicall

3 fontes1988

sport psychology

Group Environment Questionnaire

The GEQ is an 18-item instrument measuring team cohesion—the degree to which team members feel attracted to the group and perceive the group as unified around shared task and social goals. Developed by Carron, Widmeyer, and Brawley in 1985, the GEQ has become the gold standard for measuring cohesion in sport teams and

2 fontes1985

animal science

Growth Curve Fitting in Livestock

Growth curve fitting is the mathematical modeling of animal body weight and size changes over time. Developed by animal biologists and statisticians in the 1970s-1980s (Fitzhugh), the method applies nonlinear regression to weight data, extracting parameters that characterize growth rate, time to maturity, and asymptoti

3 fontes1970

sleep medicine

GSES

The Glasgow Sleep Effort Scale (GSES) is a brief instrument designed to measure the degree of mental and behavioral effort exerted in attempting to fall asleep. Developed by Broomfield and Espie in 2005, the GSES captures a key cognitive-behavioral maintenance mechanism in insomnia: excessive effort to sleep, anxiety a

1 fonte2005

Guttman Scale

Guttman scaling is a methodology for constructing unidimensional scales with a cumulative property, developed by Louis Guttman in 1944. The method assumes that items form a perfect or near-perfect hierarchy: if a respondent endorses a harder item, they must endorse all easier items below it. This creates a reproducible

3 fontes1944

food science

HACCP

HACCP (Hazard Analysis and Critical Control Points) is a systematic preventive approach to food safety developed in the late 1980s by Bryan and colleagues. It identifies potential biological, chemical, and physical hazards in food production processes and establishes critical control points to prevent contamination. HA

2 fontes1988