Many of the errors that occur in children' subtraction are due to the use of incorrect strategies rather than to the incorrect recall of number facts. A production system is presented for performing written subtraction which is consistent with an earlier analysis of the nature of such a cognitive skill. Most of the incorrect strategies used by schoolchildren can be accounted for in a principled way by simple changes in the production system, such as the omission of individual rules or (...) the inclusion of rules appropriate to other arithmetical tasks. The production system model is evaluated against a corpus of over 1500 subtraction problems done by 10‐year olds and is shown to account for about two‐thirds of the (nonnumber fact) errors. It also provides an alternative, simpler interpretation of the subtraction errors analysed by Brown and Burton (1978). Some implications for teaching are discussed. (shrink)

Within the field of human‐computer interaction, the study of the interaction between people and computers has revealed many phenomena. For example, highly interactive devices, such as the Apple Macintosh, are often easier to learn and use than keyboard‐based devices such as Unix. Similarly, consistent interfaces are easier to learn and use than inconsistent ones. This article describes an integrated cognitive model designed to exhibit a range of these phenomena while learning task‐action mappings: action sequences for achieving simple goals, such as (...) opening a file in a word processor. The model, called TAL, is of a user who is familiar with the basic operations of a keyboard and mouse, but unfamiliar with the particular menu structures, words, and actions required to use the device. The model is constructed in Soar and employs a single set of architectural mechanisms. It exhibits behavior that captures human preference for consistent, interactive, and meaningful task‐action mappings. (shrink)

Within the field of human‐computer interaction, the study of the interaction between people and computers has revealed many phenomena. For example, highly interactive devices, such as the Apple Macintosh, are often easier to learn and use than keyboard‐based devices such as Unix. Similarly, consistent interfaces are easier to learn and use than inconsistent ones. This article describes an integrated cognitive model designed to exhibit a range of these phenomena while learning task‐action mappings: action sequences for achieving simple goals, such as (...) opening a file in a word processor. The model, called TAL, is of a user who is familiar with the basic operations of a keyboard and mouse, but unfamiliar with the particular menu structures, words, and actions required to use the device. The model is constructed in Soar and employs a single set of architectural mechanisms. It exhibits behavior that captures human preference for consistent, interactive, and meaningful task‐action mappings. (shrink)

The criterion of computational universality for an architecture should be replaced by the notion of compliancy, where a model built within an architecture is compliant to the extent that the model allows the architecture to determine the processing. The test should be that the architecture does easily – that is, enables a compliant model to do – what people do easily.

Spiritual/religious coping has proven to be a fertile ground for investigating health-related spirituality in action. Ken Pargament and his colleagues have successfully demonstrated that spiritual/religious coping differs significantly from previously identified coping strategies. While much has been accomplished to date, there are undeveloped theoretical and methodological avenues that appear to provide important promise for understanding the complexities of this critical domain of coping. Some scholars have failed to conceptualize and research spiritual/religious coping as a contextual, temporally bounded process. This paper (...) explores the theoretical and methodological advantages of adopting a contextually embedded, process-oriented epistemology—contextual action theory. We propose that doing so will not only address some of the inadequacies of the extant literature but also aid researchers in exploring novel dimensions of spiritual/religious coping. From a contextual action-theory perspective, spiritual/religious coping is viewed as intentional, goal-directed behaviour that is embedded in a social and relational context. This teleonomic reconceptualization enables researchers to understand the constitution and development of intentions involved in the process of spiritual/religious coping over time. Further, a contextual action theory perspective transcends the narrow, individualistic lens of coping and explores joint and collective coping processes that emerge as people draw upon spiritual/religious practices to cope with distress. Thus, spiritual/religious coping is embedded in social and relational context and as part of personal, intentional goal-directed processes over time. The novel contributions of a contextual theoretical perspective to spiritual/religious coping research and theory are illustrated through a case example. (shrink)

That India once had a sustained ‘dialogue’ with Scottish Philosophy is not gener- ally known, or that the exchange occurred in the medium of Sanskrit, not English. The essay explores an important cross-cultural encounter in the colonial context of mid 19th-century Benares where two Scots, John Muir and James Ballantyne, served as principals of a Sanskrit college established by the East India Company. Educated toward the end of the Scottish Enlightenment, they endeavoured to translate such distinctive concepts of ‘Scotch Metaphysics’ (...) as Externalism into Indian philosophical categories. The ensuing ‘dialogue’ with Brahmin interlocutors shows that the prob- lems they faced were less terminological than conceptual, having to do with contras- tive ways of understanding ‘mind’ and ‘man’. Between the two Scots, there were also signifi cant differences, although both had gone to India as Scottish Calvinists. While Muir remained largely impervious to Indian infl uence, Ballantyne was profoundly changed, becoming, in effect, a ‘Vedantic Calvinist’. (shrink)