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Os cinco componentes de usabilidade de Nielsen

1993
  • Jakob Nielsen
Laboratório de testes de usabilidade com participantes que avaliam interfaces digitais na interação humano-computador.

(Imagem gerada apenas para fins ilustrativos)

Jakob Nielsen, a prominent usabilidade consultant in UI and webdesign mainly, defined usability through five quality components: Learnability (how easy is it for users to accomplish basic tasks the first time?), Efficiency (how quickly can they perform tasks once learned?), Memorability (can users reestablish proficiency after a period of not using it?), Errors (how many errors do users make?), and Satisfaction (how pleasant is it to use?).

Jakob Nielsen’s five-component model, detailed in his seminal 1993 book “Usability Engineering,” provided a practical and influential framework for designers and evaluators. Unlike the more formal ISO definition, Nielsen’s model is more directly applicable to the design and inspection of user interfaces. ‘Learnability’ is crucial for new users; an interface with good learnability allows someone to become productive quickly. ‘Efficiency’ targets expert users, ensuring that the system doesn’t hinder them once they’ve mastered it, often through features like shortcuts or advanced commands. ‘Memorability’ addresses the casual user who may return to the system after a long break. The interface should be easy to remember, minimizing the need for retraining. The ‘Errors’ component is not just about preventing errors but also about making them less catastrophic and providing clear ways for users to recover. A good system might use confirmation dialogs for destructive actions or offer a robust “undo” feature. Finally, ‘Satisfaction’ captures the subjective element of the user’s experience, acknowledging that even an efficient and error-free system can be frustrating or unpleasant to use. This model’s strength lies in its intuitive nature and its direct translation into actionable design goals and evaluation criteria, making it a cornerstone of practical usability work for decades.

UNESCO Nomenclature: 1203
Ciência da Computação

Tipo

Sistema abstrato

Interrupção

Incremental

Uso

Uso generalizado

Precursores

  • General principles of cognitive psychology related to learning, memory, and problem-solving.
  • Early HCI research on user performance metrics.
  • The Xerox Star interface do usuário, which pioneered many user-friendly concepts.
  • Work by researchers like Donald Norman on the psychology of everyday things.

Aplicações

  • heuristic evaluation of user interfaces
  • structuring usability test plans and reports
  • guiding user interface design decisions
  • teaching usability principles to students and professionals
  • creating design checklists and style guides

Patentes:

NA

Ideias de Inovação Potencial

  • an automated design de interface do usuário tool that generates interfaces optimized for nielsen’s five components
  • a browser plugin that scores websites in real-time on learnability and efficiency
  • a machine learning model that predicts user error rates based on interface complexity
  • adaptive interfaces that simplify for new users (learnability) and add shortcuts for experts (efficiency)
  • a “memorability score” for apps based on usage pattern analysis over time
  • gamified tutorials that specifically target and measure improvements in learnability
  • a sentiment analysis tool that continuously monitors user comments for satisfaction metrics
  • a predictive text entry system that minimizes common typing errors
  • a “digital amnesia” test suite to evaluate interface memorability after simulated time gaps
  • a design linter that flags potential usability issues related to nielsen’s components in code
Related to: usability, Jakob Nielsen, learnability, efficiency, memorability, errors, satisfaction, user interface design, HCI, usability engineering.

Contexto histórico

Os cinco componentes de usabilidade de Nielsen

1986-01-01
1990
1990
1993
1998
2010
2016
1982-07-01
1988-06-01
1990
1993
1997-04-23
2001
2010
2020

(Caso a data seja desconhecida ou irrelevante, por exemplo, "mecânica dos fluidos", é fornecida uma estimativa aproximada de seu surgimento notável)

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