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    Un test per la valutazione della produzione e della comprensione di narrative nell’adulto cerebroleso con deficit di comunicazione

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    A number of experimental studies have shown that standardized aphasia assessment results do not allow predicting performance in the brain damaged subjects on discourse comprehension. It is then necessary in routine clinical activity with these subjects to have specific assessment tools. Furthermore, it has been shown that standardised functional evaluation of information content in elicited speech samples (picture description task) from the brain damaged subjects may offer reliable measures of discourse efficiency. In this study we describe an Italian version of the Discourse Comprehension Test (Brookshire & Nicholas, 1993) that was administered together with picture description task to subjects with and without brain damage. These speech samples were evaluated with standardized method (CIUs analysis by Nicholas and Brookshire, 1993). The results show that both methods have reliable diagnostic value useful for assessing discourse abilities in communicatively impaired brain damaged subjects. We also describe a single case follow-up study where these methods were used

    Small farmers constraints and potentialities. A survey in Kenya

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    This paper identifies the features of Kenyan small-scale farmers and their production systems, highlighting the challenges of sustainability transition. Drawing on the agro-ecology and eco-economy literature, the research hypothesis is that Kenyan farmers can play a role of paramount importance in stimulating place-based sustainability practices, and assure food security outcomes, because farming occurs following indigenous, place-based tradition and knowledge. 100 small farmers in the sub-county of Gilgil in Nakuru County, Kenya have been surveyed and profiled. The survey was sponsored by MIUR (Italian Ministry of University and Research). The research aimed to contribute to the debates on the sustainability of food systems

    Correlations of flow velocity changes during mental activity and recovery from aphasia in ischemic stroke.

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    Mean flow velocity in the middle cerebral arteries (MCAs) during a rest period and during execution of a word-fluency task were measured by means of bilateral transcranial Doppler ultrasonography in 26 stroke patients with Broca's aphasia and in 25 healthy controls. Changes in flow velocity were calculated as percentage of increase from rest to mental activity. In patients, the evaluation was made within 21 days from onset of symptoms and after 2 months of speech therapy, when they were classified into two groups on the basis of extent of recovery from aphasia: absent or slight recovery (group 1, 10 patients) and good recovery (group 2, 16 patients). During the word-fluency task in the first evaluation, the increase in flow velocity in the left MCA was similar in controls and in group 2 patients. In both groups the increase was higher than in group 1 patients (p < 0.0001). Changes in mean flow velocity on the right side were slight and comparable in the three groups of study subjects. After speech therapy, group 1 patients showed a hemodynamic pattern on both sides similar to that observed in the first examination. In group 2 patients, comparison between values of the first and second evaluations showed that the increase of flow velocity in the left MCA was similar. On the right side, the increase was higher in the second than in the first examination (p < 0.01). These data further support the involvement of cerebral areas contralateral to the lesion in functional recovery after stroke. Moreover, the presence of an activation of areas in the lesioned hemisphere, soon after stroke onset, seems to be a predictor of recovery from aphasia

    Going Beyond Counting First Authors in Author Co-citation Analysis

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    The present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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