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Design Sciences | Faculty of Engineering, LTH

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The Activity Diamond

The Activity Diamond – Modeling An Enhanced Accessibility


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The purpose of the research presented in this thesis is to enhance the field of accessibility to include a multitude of perspectives. Based on cultural-historical activity theory (CHAT), it analyzes how human, artifactual and natural factors impact an individual's possibilities to act in concrete situations that are part of a systemic whole.

Two main results are presented in the thesis:

Overview of the enhanced accessibility that I argue for in the thesis

A enhanced accessibility encompassing:

Epiaccessibility, accessibility's spirit of the times, stands for how experiences of activities alter accessibility capacities, learing, expectations, attitudes, trust, demands and denials of the individual and her human, artifactual and natural environments.

Lived accessibility, which includes an individual's anticipations and how she experiences the feasibility of being able to do what she wants in a concrete situation.

Planned accessibility, which consists of all the accessibility factors that can be created beforehand based on plans, guidelines and principles.

Picture of the Activity Diamond, a model for an enhanced accessibility

The Activity Diamond, a model for accessibility:

The Activity Diamond portrays a human activity system where the subject-object relation is mediated and thus influenced by the human, artifactual and natural environments. The model is based on four interrelated sets of factors and is situated in time and place. Different actors with different activity systems may be involved. The model can also be used longitudinally over time.

The thesis is based on a series of explorative studies of unique individual's activity systems where humans, artifacts and nature together influence accessibility. The action is central, not the impairments or discriminatory factors in society.

Thesis in English: The Activity Diamond – Modeling an Enhanced Accessibility
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