Glossary
Searchable terminology from accessibility, web standards, and related fields.
6660 terms — page 2 of 333
- ABA Reversal Method (ABA Design, Reversal Design)
- The ABA reversal method is a single-subject experimental design in which one participant is observed across three phases: a baseline (A), an intervention (B), and a return to baseline (A). By comparin…
- ABC Model (Antecedent-Behavior-Consequence, ABC Analysis, ABC Framework)
- A behavioural-science framework, rooted in B. F. Skinner's operant conditioning, that analyses any observed behaviour as a three-part sequence: Antecedent (the situation, trigger, or context immediate…
- ABC Notation (ABC Text, ABC Music Notation)
- A shorthand ASCII text format for representing music notation using plain characters that can be read directly by screen readers. In ABC notation, pitch is represented by letters (A-G for different oc…
- ABET (Accreditation Board for Engineering and Technology)
- A non-profit, non-governmental body that accredits US post-secondary programmes in applied and natural science, computing, engineering, and engineering technology. ABET’s Computing Accreditation Commi…
- ACCMD (ACCessibility MetaData, IMS ACCessibility MetaData)
- A metadata specification developed by the IMS Global Learning Consortium for describing the accessibility characteristics of learning resources. ACCMD provides a structured way to document whether a r…
- ACM Code of Ethics (ACM Code of Ethics and Professional Conduct)
- A statement of professional ethics maintained by the Association for Computing Machinery (ACM) that sets out the moral and professional responsibilities of computing practitioners. Significantly revis…
- ACT Rules (Accessibility Conformance Testing Rules, ACT-R)
- A set of standardized, machine-readable test rules developed by the W3C that provide specific, objective criteria for evaluating whether web content meets accessibility requirements like WCAG success …
- AChecker (IDI Web Accessibility Checker)
- An open-source web accessibility evaluation tool that checks HTML content against accessibility standards including WCAG 2.0. AChecker identifies three types of issues: known problems (definite violat…
- AD Guidelines (Audio Description Guidelines, AD Standards)
- Established rules and best practices that govern the creation of audio descriptions for video and live performances. AD guidelines cover aspects such as what to describe (actions, characters, settings…
- AD Personalization (Audio Description Customization, Personalized Audio Description)
- The practice of tailoring audio descriptions to individual user preferences rather than providing a one-size-fits-all narration. Personalization can include varying the level of detail (concise vs. co…
- AD Timing (Audio Description Timing, AD Placement)
- The process of determining when audio descriptions should be inserted into video content. Effective AD timing requires identifying natural pauses in dialogue and significant audio where descriptions c…
- ADA (Americans with Disabilities Act)
- A landmark United States civil rights law enacted in 1990 that prohibits discrimination against individuals with disabilities in all areas of public life, including employment, education, transportati…
- ADA Compliance (Americans with Disabilities Act Compliance)
- Adherence to the requirements of the Americans with Disabilities Act (ADA), a 1990 US civil rights law that prohibits discrimination against people with disabilities in public accommodations, employme…
- ADA Title II (Title II of the Americans with Disabilities Act)
- The section of the Americans with Disabilities Act (ADA) that prohibits discrimination based on disability by public entities, including all state and local governments and their departments, agencies…
- ADA Transition Plan (ADA Self-Evaluation and Transition Plan, Accessibility Transition Plan)
- A document required under Title II of the Americans with Disabilities Act (ADA) that outlines how a public entity will make its programs, services, activities, and facilities accessible to people with…
- ADHD (Attention Deficit Hyperactivity Disorder, Attention Deficit Disorder, ADD)
- A neurodevelopmental condition characterized by persistent patterns of inattention, hyperactivity, and impulsivity that affect executive function, including working memory, task initiation, sustained …
- ADHD (Attention Deficit Hyperactivity Disorder, ADD, Attention Deficit Disorder)
- A neurodevelopmental disorder characterized by persistent patterns of inattention, hyperactivity, and impulsivity that interfere with functioning and development. ADHD affects working memory, executiv…
- ADHD Rating Scale (ADHD-RS, ADHD-RS-IV)
- A standardised assessment tool based on DSM diagnostic criteria for evaluating the frequency and severity of ADHD symptoms in children and adolescents. Completed by parents or teachers, it measures in…
- ADHD Subtype (ADHD Presentation, ADHD Type)
- A classification of ADHD based on the predominant symptom pattern experienced by an individual. The three recognized subtypes are: predominantly inattentive (difficulty sustaining attention, following…
- ADHD Tax (Disability Tax, Crip Tax)
- The additional financial, emotional, and intellectual costs that people with ADHD and other neurodivergent conditions must pay to navigate systems designed for neurotypical functioning. Examples inclu…