The linguistic impairment of the perfect aspect in Alzheimer’s disease and logopenic primary progressive aphasia

Taking into account that neuropsychological studies with subjects with language pathologies can contribute to the investigation of the organization of syntactic knowledge, the objective of this work is to investigate the syntactic representation of the perfect aspect based on data from subjects with pathologies that affect their language. More specifically, we aimed to investigate the possible phrases associated with the types of the perfect aspect and the hierarchy among them. This work aims to investigate the syntactic representation of the perfect aspect. Therefore, we sought to verify a possible linguistic impairment of this aspect in individuals diagnosed with Alzheimer's Disease (AD) and Primary Progressive Logopenic Aphasia (LPPA). A double case study was carried out with one patient with AD and another with LPPA. The methodology consisted of applying functionality tests, neuropsychological tests, and linguistic tests. The results indicated that both the AD patient and the LPPA patient present functional decline and cognitive impairment, with the degree of impairment of the first patient being more extensive than that of the second one in both cases. Regarding language, the patient with AD showed impairment with all four types of perfect, present tense, and imperfective aspect, whereas the LPPA patient has shown impairment only in perfect of recent past and present tense. Based on the results we propose the existence of a phrase to perfect of recent past and the dominance of the temporal phrase over the perfect phrases in the syntactic hierarchy.

Lexical Semantic Knowledge of Children with ASD—a Review Study

Studies on the lexical semantic abilities of children with autism have yielded contradicting results. The aim of the current review was to explore studies that have specifically focused on the lexical semantic abilities of children with ASD and try to find an explanation for these contradictions. In the 32 studies reviewed, no single factor was found to affect lexical semantic skills, although children with broader linguistic impairment generally, but not universally, also showed impaired lexical semantic skills. The need for future studies with young ASD participants, with differing intellectual functioning, longitudinal studies, and studies assessing a wide range of language domains are discussed.

Lexical-semantic abilities in children with developmental dysgraphia

Empirical data indicate that children with developmental dysgraphia may exhibit various disorders in the field of linguistic structure. However, it has not yet been determined whether linguistic impairment contributes to difficulties in mastering writing skills or whether they are a joint expression. The aim of this paper is to contribute to the understanding of the relation between the development of lexical-semantic structure and the ability to write by identifying lexical-semantic abilities in children with dysgraphia. The sample included 84 students, 42 students with developmental dysgraphia, and 42 students without disabilities. The lexical-semantic abilities were assessed by means of the Semantic Test and the Test for Speech Development. The survey was conducted in three primary schools in 2016-17 in Eastern Herzegovina. The results of the study showed that children with dysgraphia achieved significantly worse results on the Semantic Test compared to children without disabilities. Lower achievement in children with developmental dysgraphia was observed in all lexical categories examined, as well as in the overall score of the Semantic Test. The results of the Speech Development Test show that children with dysgraphia have significantly lower definitions of given terms compared to their peers of typical development. It was concluded that children with dysgraphia have significantly less developed lexical-semantic abilities than children of typical development. These findings highlight the need for additional support for vocabulary development and vocabulary enhancement in children with disabilities.

Investigating the Agrammatic Production of Canonical and Non-Canonical Sentences Cross-Linguistically

Research on agrammatism has revealed that the nature of linguistic impairment is systematic and interpretable. Non-canonical sentences are more impaired than those of canonical sentences. Previous studies on Japanese (Hiroshi et al. 2004; Chujo 1983; Tamaoka et al. 2003; Nakayama 1995) report that aphasic patients take longer Response Time (RT) and make more mistakes in producing non-canonical sentences compared to that of canonical sentences. The present research investigates the production impairments of canonical and non-canonical sentences cross-linguistically focusing on Bangla, Japanese, German and English aphasic patients. While Bangla, Japanese, German have relatively flexible word order, and hence allow freer phrasal movement, English exemplifies less freedom in word order patterns, and does not allow as much movement as the former three. We hypothesized that Bangla agrammatic patients would have more impairments in producing non-canonical sentences than those of canonical counterparts, while the production of canonical sentences is not completely devoid of impairments too. Primary data were collected from Bangla agrammatic patients, and secondary data from Japanese, German and English were exploited for cross-linguistic comparison. The findings show that Bangla agrammatic speakers have severe impairments in producing passive sentences, although the production of active ones are not completely devoid of impairments. The cross-linguistic comparison of the findings implies that the production of Bangla agrammatism tend to be similar to other agrammatic production and the production of non-canonical sentences are more difficult than those of canonical sentences cross-linguistically.

Text Simplification

Over the past decades, information has been made available to a broad audience thanks to the availability of texts on the Web. However, understanding the wealth of information contained in texts can pose difficulties for a number of people including those with poor literacy, cognitive or linguistic impairment, or those with limited knowledge of the language of the text. Text simplification was initially conceived as a technology to simplify sentences so that they would be easier to process by natural-language processing components such as parsers. However, nowadays automatic text simplification is conceived as a technology to transform a text into an equivalent which is easier to read and to understand by a target user. Text simplification concerns both the modification of the vocabulary of the text (lexical simplification) and the modification of the structure of the sentences (syntactic simplification). In this chapter, after briefly introducing the topic of text readability, we give an overview of past and recent methods to address these two problems. We also describe simplification applications and full systems also outline language resources and evaluation approaches.

Children with specific language impairment. Laurence B. Leonard. Cambridge, MA: MIT Press, 1998. Pp. 339.

Laurence Leonard is one of the most prolific and well-respected researchers in the area of specific language impairment (SLI) in children, and he is well qualified to write a book surveying the topic. SLI is a disorder of unknown origin, which appears to have a genetic component, causing delays and disorders of language development in children of normal nonverbal intelligence with no significant medical, emotional, or sensory deficits. The primary purpose of this book is to provide a comprehensive review of research in the field of SLI, and Leonard has the minute knowledge necessary to succeed at the task. The coverage in the book reaches back to the earliest nineteenth-century descriptions of children who fit the profile and then moves forward quickly to the massive literature that has accumulated on the topic in the last 20 years. Following the introductory historical and definitional section, Leonard goes on to describe the nature of the linguistic impairment in SLI, including important cross-linguistic accounts and nonlinguistic cognitive issues. The book also covers hypotheses of causation, in a “nature versus nurture” section, and clinical issues of assessment and intervention. Part V, on theory, may be of most interest to psycholinguists who are not language disorders specialists. Overall, there is no doubt that this book is both an excellent introduction for those unfamiliar with SLI and a welcome overview and resource for experts. Leonard's knowledge is encyclopedic, his presentation erudite, and his grasp of detail unfailingly impressive.

Language in schizophrenia and its relationship to formal thought disorder

Background. Although poor language test performance has been documented in schizophrenia, its relationship to formal thought disorder remains unclear.Method. Forty schizophrenic patients were administered eight language tests and, under blind conditions, rated for formal thought disorder. Measures of general intellectual function were also obtained.Results. Performance on all language tests was significantly correlated with the general intellectual measures. Three language test scores also showed significant correlations with formal thought disorder scores. Multiple regression and analysis of intellectually preserved patients suggested particular associations of formal thought disorder with semantic comprehension and picture description.Conclusions. General intellectual impairment is an important determinant of poor language test performance in schizophrenia, but presence of formal thought disorder may also contribute. A higher-order semantic deficit may be particularly relevant to both linguistic impairment and formal thought disorder.