Inclusive Design Evaluation and the Capability-demand Relationship

Persad, Umesh; Langdon, Patrick; Clarkson, PJ

doi:10.1007/1-84628-365-5_18

Cited by 8 publications

(6 citation statements)

References 7 publications

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“…By 2020, almost half the adult population in the UK will be over 50, with the over 80s being the most rapidly growing sector. Recent research into inclusive design has investigated the relationship between the capabilities of the population at large; derived from statistical data sets, and properties and features of the design of products [1][2][3]. Products meeting the ideals of inclusive design aim to minimise the number of person who have difficulty with, or are excluded from use, or to control such exclusion by manipulation of product features [4,5].…”

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confidence: 99%

The effects of prior experience on the use of consumer products

Langdon

Lewis

Clarkson

2007

Univ Access Inf Soc

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Many products today are laden with a host of features which, for the majority of users, remain unused and often obscure the use of the simple features of use for which the product was devised (Norman in The design of everyday things. Basic Books, 2002; Keates and Clarkson in Countering design exclusion-an introduction to inclusive design. Springer, 2004). Since the cognitive capabilities of the marketed target group are largely not affected by age-related impairment, the intellectual demands of such products are frequently high (Rabbitt in Quart J Exp Psychol 46A(3): 1993). In addition, the age and technology generation of a product user will colour their expectations of the product interface and affect the range of skills they have available (Docampo in Technology generations handling complex User Interfaces. Ph. D. thesis, 2001). This paper addresses the issue of what features of products make them easy or difficult to learn to use, for the wider population as well as the older user, and whether and in what way individual prior experience affect the learning and use of a product design. To achieve the above, the interactions of users of varying ages and capabilities with two different everyday products were recorded in detail as they performed set tasks. Retrospective verbal protocols were then analysed using a category scheme based on an analysis of types of learning and cognition errors. This data was then compared with users' performance on individual detailed experience questionnaires and a number of tests of general and specific cognitive capabilities. The principal finding was that similarity of prior experience to the usage situation was the main determinant of performance, although there was also some evidence for a gradual, age-related capability decline. Users of all ages adopted a means-end or trial and error interaction when faced with unfamiliar elements of the interaction. There was a strong technology generation effect such that older users were reluctant or unable to complete the required tasks for a digital camera.Keywords Inclusive design Á Product design Á Cognition Á Training Á Working memory Experience and inclusive product designIn the context of demographic changes leading to an increasing number of older people, inclusive design research strives to relate the capabilities of the population to the design of products by effectively characterising the user. By 2020, almost half the adult population in the UK will be over 50, with the over 80s being the most rapidly growing sector. Recent research into inclusive design has investigated the relationship between the capabilities of the population at large; derived from statistical data sets, and properties and features of the design of products [1][2][3]. Products meeting the ideals of inclusive design aim to minimise the number of person who have difficulty with, or are excluded from use, or to control such exclusion by manipulation of product features [4,5]. A primary area of concern is with the cognitive capabilities of older users. In pa...

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confidence: 99%

The effects of prior experience on the use of consumer products

Langdon

Lewis

Clarkson

2007

Univ Access Inf Soc

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“…As shown in Fig. 1, to analyse the design knowledge in the conceptual product design, some researchers [24,25] conducted research on the design knowledge flow in conceptual product design, with data hierarchy, function hierarchy and conceptual design hierarchy. The data hierarchy stores explicit and implicit design knowledge such as modelling, pattern, function and colour.…”

Section: Design Knowledge-aided Conceptual Product Designmentioning

confidence: 99%

Design knowledge graph-aided conceptual product design approach based on joint entity and relation extraction

Huang

Chu

et al. 2023

IFS

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Design knowledge is critical to creating ideas in the conceptual design stage of product development for innovation. Fragmentary design data, massive multidisciplinary knowledge call for the development of a novel knowledge acquisition approach for conceptual product design. This study proposes a Design Knowledge Graph-aided (DKG-aided) conceptual product design approach for knowledge acquisition and design process improvement. The DKG framework uses a deep-learning algorithm to discover design-related knowledge from massive fragmentary data and constructs a knowledge graph for conceptual product design. The joint entity and relation extraction model is proposed to automatically extract design knowledge from massive unstructured data. The feasibility and high accuracy of the proposed design knowledge extraction model were demonstrated with experimental comparisons and the validation of the DKG in the case study of conceptual product design inspired by massive real data of porcelain.

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“…The lack of understanding of target user capabilities in interface design can lead to user frustration, human errors and accidents, and even user exclusion (Keates & Clarkson, 2003). As the capability-demand relationship suggested, design exclusion takes place when the demands of certain interface feature exceed the users' capabilities (Persad, Langdon, & Clarkson, 2006). Hence, it is crucial to take into account all main user capabilities and user characteristics of older adults in the design process in order to design an easy to use and accessible user interface for older adults.…”

Section: Guiding Interface Design For Older Adultsmentioning

confidence: 99%

Developing a Framework of Guiding Interface Design for Older Adults

Liu

Joines

2012

Proceedings of the Human Factors and Ergonomics Society Annual

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Many design recommendations have been provided for designing user interfaces for older adults. Existing design recommendations over the last twenty years were reviewed. Most of the design recommendations focused on older adults’ age-related changes in physical, sensory, and cognitive abilities, from an aging perspective or aging-oriented approach. Few design recommendations have been generated focusing on older adults’ prior knowledge and experience from a generation perspective or generation-oriented approach. The comparison of the two approaches is provided and the significance of taking into account both approaches during the design process is discussed. A framework guiding interface design for older adults systematically combining both the aging-oriented approach and the generation-oriented approach is proposed. This paper describes the framework which aims to assist developing user interfaces for maximum usability and accessibility for older adults.

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Inclusive Design Evaluation and the Capability-demand Relationship

Cited by 8 publications

References 7 publications

The effects of prior experience on the use of consumer products

The effects of prior experience on the use of consumer products

Design knowledge graph-aided conceptual product design approach based on joint entity and relation extraction

Developing a Framework of Guiding Interface Design for Older Adults

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