01Beyond ergonomics

Efficiency covers one part of user experience.

Traditional ergonomics addresses usability, guidance and workload. Lived experience also includes stimulation, identity and meaning. An interface may be clear, fast and error-free while still feeling impersonal or unstimulating.

Marc Hassenzahl’s model asks which perception the system creates and which needs it supports. User experience becomes a subjective evaluation shaped by the product as well as expectations, mood, motivation and context.

02Two families of qualities

Do-goals explain action. Be-goals explain meaning.

Pragmatic quality is the perceived ability of a system to help someone achieve a concrete objective: finding information, booking a trip or completing a task. It relates to usefulness, controllability and efficiency — the model’s do-goals.

Hedonic quality concerns be-goals: aspirations related to the self. My doctoral research describes three components: stimulation, which supports novelty and growth; identification, which helps express who we are; and evocation, which connects a product to memories or meaningful experiences. In a messaging service, successful delivery supports the action goal, while a sense of connection supports the being goal.

03A dynamic experience

Perception, emotion and behavior continuously shape one another.

Perceived pragmatic and hedonic qualities influence emotional valence and arousal. Those emotions then contribute to overall appraisal, product choice and usage behavior. The model therefore describes a loop between perception, affect and action.

Time matters too. A product that feels stimulating at first may become familiar; an initially complex interaction may become fluid through learning. Any user experience (UX) measure should therefore specify the situation, timing of evaluation and the user’s history with the system.

04From model to design

Two simple questions can transform a product brief.

First: what must the person be able to do without needless friction? Second: which need or self-image should the experience support? The answers lead to different decisions. A dashboard should make decisions efficient, but it may also create a feeling of control. A learning app should make progress legible while stimulating curiosity and learner identity.

AttrakDiff, a user-experience evaluation questionnaire, operationalizes the framework by measuring overall attractiveness and perceived pragmatic and hedonic qualities. The model also serves as a design framework for connecting task success with lived value.