Characterization of agrammatism in Tagalog: Evidence from narrative spontaneous speech

Abstract

ABSTRACT Background Agrammatism in agglutinative languages exhibits preservation of verb morphology due to their rich morphological paradigms. Tagalog, an agglutinative language mainly spoken in the Philippines, remains uncharacterized in agrammatism yet holds potential for future research that can challenge existing theories and help advance novel ones. Aims The purpose of this study is to quantify and describe the characteristics of agrammatism in Tagalog in narrative spontaneous speech, to examine whether these patterns resemble those reported in other agglutinative languages, and to compare the results obtained to those emerging in literature for non-agglutinative languages. Methods & Procedures Narrative spontaneous speech was elicited from 10 individuals with non-fluent Broca’s aphasia and 12 matched controls. A series of parameters, both conventional and language-specific measures, were selected for analyses. Outcomes & Results Tagalog-speaking individuals with agrammatism exhibited slow and fragmented speech, with a strong preference for minor and simple constructions resulting to decrease in overall grammaticality and sentence complexity. Verb deficits were also found specifically in verbal predication, lexical diversity, and finiteness. There is a prevalent use of bare verb forms, consequently resulting to the decline of verb finiteness and inflections. Code-mixing is found to be extremely variable and statistically non-prominent between groups but patterns may be attributed to personal and sociolinguistic factors. Conclusion Patterns of agrammatism in Tagalog majorly mirror the trends reported in other agglutinative and non-agglutinative languages. Where Tagalog agrammatism departs from other agglutinative languages is the increased use of bare verbs as opposed to the obligatory inflected forms. Although still many questions are unresolved, Tagalog offers an interesting testing ground for variety of topics and issues in agrammatic aphasia.