Biomedical subjects

Gary Libben

Publications and source records attributed to Gary Libben.

8 recordsLinked to original sources

PubMed2004

Probability in the grammar of German and Dutch: interfixation in triconstituent compounds.

This study addresses the possibility that interfixes in multiconstituent nominal compounds in German and Dutch are functional as markers of immediate constituent structure. We report a lexical statistical survey of interfixation in the lexicons of German and Dutch which shows that all interfixes of German and one interfix of Dutch are significantly more likely to appear at the major constituent boundary than expected under chance conditions. A series of experiments provides evidence that speakers of German and Dutch are sensitive to the probabilistic cues to constituent structure provided by the interfixes. Thus, our data provide evidence that probability is part and parcel of grammatical competence.

Cognition↗

PubMed2003

Compound fracture: the role of semantic transparency and morphological headedness.

This paper explores the role of semantic transparency in the representation and processing of English compounds. We focus on the question of whether semantic transparency is best viewed as a property of the entire multimorphemic string or as a property of constituent morphemes. Accordingly, we investigated the processing of English compound nouns that were categorized in terms of the semantic transparency of each of their constituents. Fully transparent such as bedroom are those in which the meanings of each of the constituents are transparently represented in the meaning of the compound as a whole. These compounds were contrasted with compounds such as strawberry, in which only the second constituent is semantically transparent, jailbird, in which only the first constituent is transparent, and hogwash, in which neither constituent is semantically transparent. We propose that significant insights can be achieved through such analysis of the transparency of individual morphemes. The two experiments that we report present evidence that both semantically transparent compounds and semantically opaque compounds show morphological constituency. The semantic transparency of the morphological head (the second constituent in a morphologically right-headed language such as English) was found to play a significant role in overall lexical decision latencies, in patterns of decomposition, and in the effects of stimulus repetition within the experiment.

Humans↗

PubMed2003

Semantics and semantic errors: implicit access to semantic information from words and nonwords in deep dyslexia.

In this paper we describe dissociations of implicit versus explicit access to semantic information in a patient with deep dyslexia. This acquired reading disorder is characterized by the production of morphological (e.g., SLEEP read as SLEEPING) and semantic errors (e.g., HEART read as BLOOD) and consequently provides a potential window into the operation of both aspects of the language system. The deep dyslexic patient in this study (JO) demonstrated implicit semantic access to items in a number of tasks despite the fact that she was unable to correctly read these items aloud. The findings from this study are consistent with a model of lexical deficits that distinguishes between explicit and implicit access to lexical representations on the basis of inhibitory processes.

Dyslexia↗

PubMedDate not supplied

Morphological representation in an endangered, polysynthetic language.

This article presents the results from an initial psycholinguistic study of patterns of morphological representation in Dene Suliné (Chipewyan), an indigenous and highly endangered language spoken in Northwestern Canada. Our investigation focused on how morphological knowledge in this polysynthetic language is affected across various levels of language attrition by employing a morphological segmentation task and an off-line lexical decision task. We discuss the manner in which these tasks target different aspects of morphological ability and then turn to methodological issues associated with conducting psycholinguistic studies with language users that differ in levels of age, education, literacy, and bilingualism (Dene- English). Finally, we report on the challenges of doing psycholinguistic research outside the confines of a university setting and make some recommendations to other researchers who might wish to undertake similar studies.

Humans↗

PubMedDate not supplied

The role of typological variation in the processing of interfixed compounds.

This study investigates the processing of interfixed compounds within a primed lexical decision paradigm. Results from an experiment on German are compared with those from a previous study on Greek and Polish, demonstrating that patterns of morphological priming in German differ from those obtained in the other two languages. In all experiments compounds were primed by initial morphemes with and without the interfix. In Greek and Polish priming was significantly facilitated in cases where the mophological prime was homophonous with a real word. In German, however, the effect of wordness was found for un-interfixed but not for interfixed primes. Our data suggest that patterns of morphological priming for a given structure may not be generalizable to analogous structures in other languages without a consideration of language-specific morphological properties.

Adolescent↗

PubMedDate not supplied

Mental lexicon research in the new millennium.

This article presents an overview of current research on the mental lexicon, as it is represented by articles in the spring 2002 Special Issue of Brain and Language. We examine current findings in terms of language, task, and population effects associated with how words are presented and processed in the mind. We discuss how such mental representations may be linked to neurological instantiations and address the issue of ecological validity in the field. These discussions are organized in order to both provide an overview of the issues and to enable the reader to locate specific articles that bear on these issues. Finally, we present an organizational framework for the characterization of mental lexicon research within which challenges for advancement are isolated.

Cognition↗

PubMedDate not supplied

Conceptions and questions concerning morphological processing.

The understanding of the nature and extent of morphological processing is critical to the overall investigation of how words are organized in the mind. In this overview article, we discuss the nature of morphological processing and the domain of morphological processing research. We claim that investigations crucially involve the understanding of relations among morphologically simple and morphologically complex words, and sketch how specific questions of morphological processing within the 2004 special issue on the mental lexicon fall under these categories. Finally, we discuss issues of construct, content and ecological validity within the field and what morphological processing can reveal about the association of form and meaning in the mind.

Humans↗

PubMedDate not supplied

Lexicality, morphological structure, and semantic transparency in the processing of German ver-verbs: The complementarity of on-line and off-line evidence.

Two types of experiments investigate the visual on-line and off-line processing of German ver-verbs (e.g., verbittern 'to embitter'). In Experiments 1 and 2 (morphological priming), latency patterns revealed the existence of facilitation effects for the morphological conditions (BITTER-VERBITTERN and BITTERN-VERBITTERN) as compared to the neutral conditions (SAUBER-VERBITTERN and SAUBERN-VERBITTERN). In Experiments 3 and 4 (rating tasks) participants had to judge whether the target (VERBITTERN) "comes from," "contains a form of," or "contains the meaning of" the root (BITTER) or the root+en substring (BITTERN). Taken together, these studies revealed the combined influence of the three factors of lexicality (real word status), morphological structure, and semantic transparency.

Decision Making↗