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51.
The value of λ is one of the main issues debated in international usability studies. The debate is centred on the deficiencies
of the mathematical return on investment model (ROI model) of Nielsen and Landauer (1993). The ROI model is discussed in order
to identify the base of another model that, respecting Nielsen and Landauer’s one, tries to consider a large number of variables
for the estimation of the number of evaluators needed for an interface. Using the bootstrap model (Efron 1979), we can take into account: (a) the interface properties, as the properties at zero condition of evaluation and (b) the probability
that the population discovery behaviour is represented by all the possible discovery behaviours of a sample. Our alternative
model, named Bootstrap Discovery Behaviour (BDB), provides an alternative estimation of the number of experts and users needed
for a usability evaluation. Two experimental groups of users and experts are involved in the evaluation of a website (). Applying the BDB model to the problems identified by the two groups, we found that 13 experts and 20 users are needed to
identify 80% of usability problems, instead of 6 experts and 7 users required according to the estimation of the discovery
likelihood provided by the ROI model. The consequence of the difference between the results of those models is that in following
the BDB the costs of usability evaluation increase, although this is justified considering that the results obtained have
the best probability of representing the entire population of experts and users. 相似文献
52.
Di Nocera F Couyoumdjian A Ferlazzo F 《Quarterly journal of experimental psychology (2006)》2006,59(1):204-221
This paper introduces a perspective accounting for errors that may occur as a result of the human interaction with the three-dimensional (3D) space. Particularly, we are interested in errors that are caused by cognitively crossing the boundary between peripersonal and extrapersonal space. Several behavioural, neurophysiological, and neuropsychological perspectives are reviewed in order to develop the theoretical framework on which our ideas are founded. We argue that cognitively crossing the boundary implies switching from one frame of reference to another, which, as a consequence, implies specific costs. The results of five experiments (overall involving 76 participants) support our hypothesis, suggesting the existence of different action-oriented spatial frames of reference. 相似文献
53.
The paper discusses the structure of non-verbal predication, with particular reference to the role of the copula. Differently from the main tenets of contemporary logico-philosophical and linguistic theories, a model of predication is proposed where the verbal component (specifically, tense information) is regarded as central in establishing the syntactic and semantic relation between a predicate and its subject. It is thus possible to recover some of the insights of the pre-Fregean analysis of predication. The proposed solution has a number of significant consequences for the structure to be assigned to non-verbal predication, in particular for the semantics of small clause constituents, where the predication is established without the copula. 相似文献
54.
Stressful situations may contribute to pathological states in elderly people facing harmful events. This study investigated the relationships between adopting appropriate coping strategies, transforming circumstances to personal preferences or adjusting personal preferences to situational constraints, and the efficiency of cognitive functioning in an elderly sample of 121 residents drawn from a rural community in southern Italy. They were administered the Mini-Mental State Examination, the Tenacious Goal Pursuit, Flexible Goal Adjustment, and Coping Inventory for Stressful Situations. Intercorrelations of scores suggested that facing stressful situations is somewhat associated with efficient cognitive functioning and coping strategies that ensure a wide range of solutions. 相似文献
55.
This study investigates the differences in the input representations of verbs and nouns in the Italian mental lexicon. One visual lexical decision experiment in which the stem homograph effect (Laudanna, Badecker, and Caramazza, 1989) was evaluated on noun and verb targets is reported. Strong inhibitory effects on verb targets preceded by stem homographs relative to nonhomographic word pairs were found. The effects on verb targets were also much more reliable than the effects on noun targets. The pattern of results provides support for the hypothesis that noun and verbs are differently represented in the orthographic input lexicon. 相似文献
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Functional mapping of left parietal areas involved in simple addition and multiplication. A single‐case study of qualitative analysis of errors
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Alessandro Della Puppa Serena De Pellegrin Elena Salillas Alberto Grego Anna Lazzarini Antonino Vallesi Marina Saladini Carlo Semenza 《Journal of Neuropsychology》2015,9(2):330-335
All electrostimulation studies on arithmetic have so far solely reported general errors. Nonetheless, a classification of the errors during stimulation can inform us about underlying arithmetic processes. The present electrostimulation study was performed in a case of left parietal glioma. The patient's erroneous responses suggested that calculation was mainly applied for addition and a combination of retrieval and calculation was mainly applied for multiplication. The findings of the present single‐case study encourage follow up with further data collection with the same paradigm. 相似文献