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Sensitivity Analysis-Based Purposive Sampling

Sensitivity analysis-based purposive sampling extends conventional purposive sampling by systematically testing whether key findings or case-selection decisions change when the inclusion criteria, selection logic, or boundary conditions are altered. It applies the logic of sensitivity analysis — standard in quantitativ

Sensor Data Collection

Sensor data collection uses physical or digital instruments to automatically capture quantitative measurements from the environment, human bodies, or machines over time. Common sensors measure temperature, motion, heart rate, location, light, sound, or chemical properties. Because the recording is automated and continu

anxiety disorders

Separation Anxiety Questionnaire

The Separation Anxiety Questionnaire (SAQ) is a self-report instrument measuring the intensity of separation anxiety experienced during or anticipated during separation from attachment figures. Developed by Sharpley and colleagues in 2000, the SAQ assesses worry, fear, and distress related to being apart from parents,

1 fonte2000

clinical assessment

Sequential Organ Failure Assessment Score

The Sequential Organ Failure Assessment (SOFA) score, introduced by Vincent and Moreno in 1996, is a 24-point daily assessment tool that quantifies organ dysfunction across six physiological systems in critically ill patients. It was adopted into the 2016 Sepsis-3 definitions and is now the international standard for i

2 fonti1996

spectroscopy

SERS

Surface-Enhanced Raman Spectroscopy (SERS) amplifies weak Raman signals by many orders of magnitude when analyte molecules are adsorbed on specially prepared metal (typically silver or gold) nanostructured surfaces. Discovered by Fleischmann, Hendra, and McQuillan in 1974, SERS enables detection of vibrational signatur

3 fonti1974

organizational behavior

Servant Leadership Scale

The Servant Leadership Scale (SLS), developed by Liden and colleagues in 2008, measures the extent to which leaders prioritize others' well-being and development. Building on Robert Greenleaf's 1970 concept of servant leadership, the SLS operationalizes servant leadership across seven dimensions: emotional healing, cre

2 fonti2008

marketing management

SERVPERF Scale

SERVPERF, developed by Cronin and Taylor in 1992, is a streamlined service quality measurement instrument that evaluates perceived service performance only, without the expectation component. Using 22 items identical in content to SERVQUAL but applied to perception alone, SERVPERF reduces survey burden while maintainin

2 fonti1992

marketing management

SERVQUAL Service Quality Scale

SERVQUAL is a 22-item, multi-dimensional scale developed by Parasuraman, Zeithaml, and Berry in 1988 to measure consumer perceptions of service quality. It captures the gap between customer expectations and actual service performance across five core dimensions: Tangibles, Reliability, Responsiveness, Assurance, and Em

2 fonti1988

gerontology

SES

The Social Engagement Scale (SES) is a brief self-report measure assessing the frequency and quality of social contact and participation in social activities in older adults. While multiple versions exist (developed by various researchers in gerontology), the core concept measures social connection—the degree to which

3 fonti2000

psychotherapy research

Session Rating Scale

The Session Rating Scale (SRS) is a 4-item ultra-brief measure of client perceptions of session quality and therapeutic alliance, developed by Miller and Duncan to support real-time feedback in psychotherapy. Administered after each session, the SRS captures client satisfaction with the relationship, alignment on goals

2 fonti2000

sports science

Session RPE

Session rate of perceived exertion (sRPE) is a simple, athlete-centered method to quantify training load by combining perceived exertion intensity (RPE, 0-10 scale) with session duration. Introduced by Carl Foster (2001), sRPE avoids the need for external equipment (heart rate monitors, GPS, force plates) and captures

3 fonti2001

occupational health

Sexual Harassment Experiences Questionnaire

The Sexual Harassment Experiences Questionnaire measures employee exposure to unwanted sexual behavior, comments, and coercion in the workplace. Developed by Fitzgerald, Gelfand, and Drasgow, the SHEQ distinguishes between gender harassment, unwanted sexual attention, and sexual coercion—recognizing that sexual harassm

2 fonti1995

urology gynecology

Sexual Satisfaction Scale

The Sexual Satisfaction Scale (also known as the Kansas City Sexual Satisfaction Scale) is a brief, unidimensional self-report measure designed to assess subjective satisfaction with sexual life and sexual relationships. First published by Ponticas in 2003, it comprises typically 5–7 items measuring global sexual satis

2 fonti2003

SF-12 Health Survey

The SF-12 is a brief, 12-item version of the SF-36 health survey developed by Ware, Kosinski, and Keller in 1996. Designed to reduce respondent burden while maintaining psychometric validity, it has become the standard instrument for large-scale surveys, epidemiological studies, and health outcomes research where admin

3 fonti1996

SF-36 Health Survey

The SF-36 is a generic, self-administered 36-item questionnaire measuring eight dimensions of health status. Developed by Ware and Sherbourne in 1992, it has become the most widely used health survey in clinical trials, outcomes research, and population health monitoring. It assesses perceived health across physical an

3 fonti1992

SF-8 Health Survey

The SF-8 is an ultra-brief, 8-item version of the SF-36 health survey developed by Ware and colleagues in 2005. Designed for extreme time-constraint settings and large-scale epidemiological surveys, the SF-8 maintains strong correlation with SF-36 and SF-12 domains while requiring only 1–2 minutes to complete.

3 fonti2005

pulmonology

SGRQ

The SGRQ is a 76-item disease-specific quality-of-life instrument designed to measure health status in patients with chronic respiratory disease, particularly chronic obstructive pulmonary disease (COPD). Developed by Jones and colleagues at King's College London in 1991, it has become the gold standard for assessing f

2 fonti1991

dentistry

Shade Selection in Dentistry

Shade selection in dentistry is the process of determining the appropriate color and translucency of tooth-colored restorative materials to match the patient's natural dentition. Systematic shade selection involves visual assessment using calibrated shade guides, spectrophotometric measurement, and sometimes digital im

3 fonti1980

clinical psychology

Sheehan Disability Scale

The Sheehan Disability Scale is a brief three-item self-report measure designed by David V. Sheehan to assess functional impairment across work/school, social life, and family life domains in psychiatric and medical disorders. First described in Sheehan's 1983 book 'The Anxiety Disease' and validated in multiple studie

3 fonti1983

Short form construct validity

Short form construct validity is the systematic evaluation of whether an abbreviated version of a psychological scale still measures the same underlying construct as the original full-length instrument. It combines item selection procedures with confirmatory factor analysis, convergent and discriminant validity tests,

Short form content validity

Short-form content validity evaluates whether items retained in an abbreviated scale still adequately represent every substantive facet of the construct measured by the original full-length instrument. It ensures that shortening a scale does not hollow out the conceptual domain it was designed to cover.

2 fonti1995

Short form differential item functioning

Short-form differential item functioning (DIF) analysis examines whether individual items in an abbreviated scale function equivalently across demographic or subgroup comparisons. When a scale is shortened, retained items must still behave fairly for all relevant groups — DIF analysis verifies this, ensuring that score

2 fonti1970

Short form generalizability theory

Short form generalizability theory applies the G-theory variance-component framework to abbreviated measurement instruments, using G-studies and D-studies to estimate how many items a short scale must retain to achieve a desired reliability and to evaluate the accuracy of decisions made with a condensed instrument.

2 fonti1963

Short Form Measurement Invariance

Short form measurement invariance testing evaluates whether an abbreviated version of a psychological scale measures the same latent construct equivalently across groups or conditions. It applies the hierarchical multigroup confirmatory factor analysis invariance sequence — configural, metric, scalar, and strict — spec

2 fonti2000

Short form nomological validity

Short form nomological validity examines whether an abbreviated version of a psychological scale preserves the pattern of theoretically expected correlations with conceptually related and unrelated constructs. It is a cornerstone step in justifying the use of a shortened instrument in research and applied settings.

2 fonti1955

gastroenterology

Short Inflammatory Bowel Disease Questionnaire

The Short Inflammatory Bowel Disease Questionnaire (IBDQ-32) is a validated patient-reported outcome measure designed to assess the impact of inflammatory bowel disease (IBD)—both ulcerative colitis and Crohn's disease—on health-related quality of life. Derived from the original 32-item IBDQ, this instrument comprises

1 fonte2004

Short-form item analysis

Short-form item analysis is the systematic psychometric evaluation and selection of items when constructing an abbreviated version of a longer measurement instrument. It applies classical and modern item-analysis criteria — item-total correlations, reliability estimates, and factor structure — to identify the smallest

Short-form McDonald's omega

Short-form McDonald's omega applies the omega reliability coefficient to abbreviated or shortened versions of psychological scales. It provides a theoretically sound reliability estimate that accounts for the multidimensional structure of the short instrument, enabling researchers to evaluate whether abbreviation has p

2 fonti1999

Short-form reliability analysis

Short-form reliability analysis evaluates whether an abbreviated version of a psychological scale maintains acceptable internal consistency, validity, and structural integrity after items are removed. It is used in survey and assessment research to create briefer instruments that reduce respondent burden without sacrif

Short-Form Scale Development

Short-form scale development is the systematic process of reducing a full-length psychological scale to a smaller subset of items while preserving the construct validity, reliability, and measurement properties of the original instrument. It is widely used when administration burden must be minimised without sacrificin

Short-form test-retest reliability

Short-form test-retest reliability quantifies how consistently an abbreviated version of a measurement instrument produces the same scores across two administrations separated by a defined time interval. It is a critical validation step whenever a full-length scale is shortened for practical use, confirming that item r

SIBTEST

SIBTEST (Simultaneous Item Bias Test) is a non-parametric method for detecting differential item functioning (DIF) and differential test functioning (DTF) developed by Shealy and Stout (1993). Unlike parametric approaches, SIBTEST does not assume a particular item response model and directly tests whether groups differ

3 fonti1993

Sickness Impact Profile

The Sickness Impact Profile (SIP) is a comprehensive 136-item behavioral health status measure developed by Bergner and colleagues at the University of Washington in 1976. It assesses the impact of illness on daily activities and behavior across physical, psychosocial, and independent living dimensions. The SIP remains

3 fonti1976

psychology

Signal Detection Theory

Signal Detection Theory (SDT) is a framework for analyzing how observers detect signals embedded in noise, accounting for both sensory capacity and decision-making bias. Developed by Green and Swets in the 1960s, it provides a principled method for measuring sensitivity and response criteria separately, making it found

3 fonti1966

forestry

Silvicultural Treatment Design

Silvicultural treatment design is the process of developing specific management prescriptions for forest stands to achieve defined objectives (timber yield, biodiversity, carbon storage, watershed protection). Codified in foundational texts by Smith and colleagues, silvicultural design integrates stand assessment, grow

4 fonti1950

gastroenterology

Simple Clinical Colitis Activity Index

The Simple Clinical Colitis Activity Index (SCCAI) is a practical, bedside tool for assessing disease activity in ulcerative colitis and colonic Crohn's disease. Published in 1998 by Walmsley and colleagues, the SCCAI condenses disease assessment into six items that can be administered in a office visit without laborat

1 fonte1998

Simple random sampling

Simple random sampling (SRS) is the foundational probability sampling method in which every unit in the population has an equal and independent chance of being selected. Because selection is governed purely by chance, SRS eliminates systematic bias, supports unbiased estimation of population parameters, and provides th

2 fonti1953

forestry

Site Index Curve

A site index curve is a family of curves relating tree height to stand age, used to quantify the productivity of a forest site. Site index is conventionally defined as the height of dominant trees at a reference age (typically 50 years in temperate forests). These curves enable foresters to classify sites by productivi

2 fonti1954

human factors

Situational Awareness Rating Technique

The Situational Awareness Rating Technique (SART), developed by Robert Taylor in 1990 for the NATO Advisory Group for Aerospace Research and Development (AGARD), is a subjective post-task measurement instrument for assessing an operator's degree of situational awareness (SA)—the perception of elements in the environmen

1 fonte1990

physical therapy

Six-Minute Walk Test

The Six-Minute Walk Test (6MWT) is a submaximal exercise assessment measuring the total distance a person can walk in six minutes at a self-selected pace. Developed by Guyatt and colleagues in 1985, the 6MWT has become the standard submaximal functional exercise test for patients with cardiopulmonary disease, quantifyi

2 fonti1985

dermatology

Skindex-29

Skindex-29 is a validated, patient-centered quality-of-life measure specifically designed to assess the impact of any skin disease on patients' symptoms, emotions, and functioning. Developed by Chren, Lasek, and colleagues in 1997, it captures the multidimensional burden of dermatological conditions beyond clinical sev

2 fonti1997