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This paper presents a study of PH, a woman with aphasia, who shows a robust impairment in naming pictures of non-living relative to living things. Un-timed investigations of feature knowledge show similar performance across categories suggesting that, as in previous studies, the category effect may be arising at a post-semantic level. However, her performance on a timed feature verification task was slower for non-living than living things (relative to matched controls), in line with her naming. This suggests that the source of PH's category deficit is in fact semantic and that thorough investigation is necessary before claiming a post-semantic category specific deficit in word production. Finally, the results of an intervention study, which apparently eliminated the effect of semantic category on PH's naming, are reported.
Die vorliegende Studie untersucht die Lesefehler eines 10jährigen Jungen (OL) mit Entwicklungsdyslexie, der bei seinen Leseversuchen ausschließlich eine buchstabierende Lesestrategie anwendete. OL zeigte eine starke Beeinträchtigung in der Entwicklung sowohl der lexikalischen und als auch der nichtlexikalischen Leseroute. Im Rahmen einer detaillierten Fehlerklassifikation wurden die Fehler beim nichtlexikalischen Lesen auf einzelne Subkomponenten der nichtlexikalischen Leseroute, des Parsers, Translators und Blenders (Temple, 1985) übertragen. Die Mehrheit der Lesefehler von OL tauchte auf der Ebene des Blenders auf. Auslassungen vorher bereits benannter Grapheme stellten den häufigsten Fehlertyp dar. Die Beeinträchtigung in der Entwicklung der Blendingfähigkeiten wird daher als hauptsächliche Ursache für OLs Unfähigkeit, eine nichtlexikalische Verarbeitungsstrategie aufzubauen, angesehen.
Judging the animacy of words
(2016)
The age at which members of a semantic category are learned (age of acquisition), the typicality they demonstrate within their corresponding category, and the semantic domain to which they belong (living, non-living) are known to influence the speed and accuracy of lexical/semantic processing. So far, only a few studies have looked at the origin of age of acquisition and its interdependence with typicality and semantic domain within the same experimental design. Twenty adult participants performed an animacy decision task in which nouns were classified according to their semantic domain as being living or non-living. Response times were influenced by the independent main effects of each parameter: typicality, age of acquisition, semantic domain, and frequency. However, there were no interactions. The results are discussed with respect to recent models concerning the origin of age of acquisition effects.
Judging the animacy of words
(2017)
The age at which members of a semantic category are learned (age of acquisition), the typicality they demonstrate within their corresponding category, and the semantic domain to which they belong (living, non-living) are known to influence the speed and accuracy of lexical/semantic processing. So far, only a few studies have looked at the origin of age of acquisition and its interdependence with typicality and semantic domain within the same experimental design. Twenty adult participants performed an animacy decision task in which nouns were classified according to their semantic domain as being living or non-living. Response times were influenced by the independent main effects of each parameter: typicality, age of acquisition, semantic domain, and frequency. However, there were no interactions. The results are discussed with respect to recent models concerning the origin of age of acquisition effects.
In der neurolinguistischen Forschung gewinnt das Erwerbsalter als einflußnehmende Variable auf die lexikalische Verarbeitung zunehmend an Bedeutung. Ein normiertes Datenkorpus liegt für das Deutsche jedoch noch nicht vor. Die vorliegende Arbeit untersucht drei unterschiedliche Formen des Erwerbsalters für konkrete Nomina des Deutschen: produktives Erwerbsalter, Benennalter und geschätztes Erwerbsalter. Das geschätzte Erwerbsalter wurde für ein Korpus von 255 Objektbezeichnungen (Snodgrass & Vanderwart, 1980), erhoben. Geschätztes Erwerbsalter, Benennalter und produktives Erwerbsalter wurden für ein Subset von 33 Stimuli miteinander verglichen. Es zeigten sich hochsignifikante Korrelationen zwischen allen drei Formen des Erwerbsalters. Allerdings erwies sich das produktive Erwerbsalter als signifikant niedriger als das geschätzte Erwerbsalter und das Benennalter, während sich letztere Messungen nicht voneinander unterscheiden. Das geschätzte Erwerbsalter scheint daher am ehesten dem Benennalter zu entsprechen. Die Ergebnisse weisen darauf hin, daß das Benennalter eine geeignete Messung zur Validierung von geschätzten Erwerbsdaten darstellt.
Various behavioural studies show that semantic typicality (TYP) and age of acquisition (AOA) of a specific word influence processing time and accuracy during the performance of lexical-semantic tasks. This study examines the influence of TYP and AOA on semantic processing at behavioural (response times and accuracy data) and electrophysiological levels using an auditory category-member-verification task. Reaction time data reveal independent TYP and AOA effects, while in the accuracy data and the event-related potentials predominantly effects of TYP can be found. The present study thus confirms previous findings and extends evidence found in the visual modality to the auditory modality. A modality-independent influence on semantic word processing is manifested. However, with regard to the influence of AOA, the diverging results raise questions on the origin of AOA effects as well as on the interpretation of offline and online data. Hence, results will be discussed against the background of recent theories on N400 correlates in semantic processing. In addition, an argument in favour of a complementary use of research techniques will be made. (C) 2015 Elsevier Ltd. All rights reserved.