Productive vocabulary across discourse types

Aims: The goals of the study were (a) to examine the effect of discourse type on lexical diversity by testing whether there are significant differences among language samples elicited using four discourse tasks (procedures, eventcasts, story telling, and recounts); and (b) to assess the extent to which age influences lexical diversity when different types of discourse are elicited. Methods & Procedures: A total of 86 cognitively healthy adults participated in the study and comprised two groups – young adults (20–29 years old) and older adults (70–89 years old). Participants completed the discourse tasks and their language samples were analysed using dedicated software (voc-D) to obtain estimates of their lexical diversity. Outcomes & Results: A mixed 2 × 4 ANOVA was conducted and followed by an investigation of simple main effects. A lexical diversity hierarchy was established that was similar for both age groups. The study also uncovered age-related differences that were evident when the stimuli were verbally presented but were eliminated when the language samples were elicited using pictorial stimuli. Conclusions: Results indicated that lexical diversity is one of the microlinguistic indices that are influenced by discourse type and age, a finding that carries important methodological implications. Future investigations are warranted to explore the patterns of lexical diversity in individuals with neurogenic language disorders and assess the clinical utility of measures of lexical diversity.

[1]  Walter Loban,et al.  Language Development: Kindergarten through Grade Twelve. NCTE Committee on Research Report No. 18. , 1976 .

[2]  F. Cockcroft.  Screening tests. , 1974, Nursing times.

[3]  Susan Kemper,et al.  Aging and message production and comprehension , 1998 .

[4]  M. Kendall.  The Statistical Study of Literary Vocabulary , 1944, Nature.

[5]  R. Feinn,et al.  Microlinguistic deficits in the narrative discourse of adults with traumatic brain injury , 2005, Brain injury.

[6]  Valarie B. Fleming,et al.  Complex discourse production in mild cognitive impairment: Detecting subtle changes , 2008 .

[7]  J. A. Christiansen.  Coherence Violations and Propositional Usage in the Narratives of Fluent Aphasics , 1995, Brain and Language.

[8]  M. Jørgensen,et al.  Discourse Analysis as Theory and Method , 2002 .

[9]  K. O’Loughlin,et al.  Lexical density in candidate output on direct and semi-direct versions of an oral proficiency test , 1995 .

[10]  R. Brookshire,et al.  A system for quantifying the informativeness and efficiency of the connected speech of adults with aphasia. , 1993, Journal of speech and hearing research.

[11]  P. Guiraud.  Problèmes et méthodes de la statistique linguistique , 1960 .

[12]  L. Gleitman,et al.  [Language and thought]. , 1991, La Revue du praticien.

[13]  R. Harald Baayen,et al.  How Variable May a Constant be? Measures of Lexical Richness in Perspective , 1998, Comput. Humanit..

[14]  David Malvern,et al.  Developmental trends in lexical diversity , 2004 .

[15]  E. Goffman,et al.  Forms of talk , 1982 .

[16]  Philip M. McCarthy,et al.  MTLD, vocd-D, and HD-D: A validation study of sophisticated approaches to lexical diversity assessment , 2010, Behavior research methods.

[17]  Scott E. Maxwell,et al.  Designing Experiments and Analyzing Data: A Model Comparison Perspective , 1990 .

[18]  Andrew R. A. Conway,et al.  Variation in working memory , 2008 .

[19]  C. Berg,et al.  Intellectual development in adulthood , 2000 .

[20]  A. McCabe,et al.  Comparison of Discourse Genres: Clinical Implications , 2006 .

[21]  P. Schwanenflugel,et al.  RELATIONSHIP BETWEEN LEXICAL COMPETENCE AND LANGUAGE PROFICIENCY: Variable Sensitivity , 2005, Studies in Second Language Acquisition.

[22]  B. MacWhinney.  The CHILDES project: tools for analyzing talk , 1992 .

[23]  David Malvern,et al.  Measuring vocabulary diversity using dedicated software , 2000 .

[24]  Stacy A. Wagovich,et al.  CIU and main event analyses of the structured discourse of older and younger adults. , 2005, Journal of communication disorders.

[25]  J. Wambaugh,et al.  Effects of a combined semantic/phonologic cueing treatment on word retrieval in discourse , 2006 .

[26]  María Soledad Rodríguez,et al.  Narrative speech in aging: Quantity, information content, and cohesion , 2005, Brain and Language.

[27]  C. Mackenzie,et al.  Further evidence on topic use following right hemisphere brain damage: Procedural and descriptive discourse , 2005 .

[28]  S. Heath.  Taking a cross‐cultural look at narratives , 1986 .

[29]  S. R. Parkinson,et al.  Effects of memory impairment on discourse , 2000, Journal of Neurolinguistics.

[30]  S. Kemper,et al.  The structure of verbal abilities in young and older adults. , 2001, Psychology and aging.

[31]  Screening tests. , 1995, Environmental science & technology.

[32]  D. Hultsch,et al.  Memory Change in the Aged , 1998 .

[33]  Irene Barrow,et al.  Descriptive discourse abilities of traumatic brain-injured adults , 2003 .

[34]  Guoxing Yu,et al.  Lexical Diversity in Writing and Speaking Task Performances , 2010 .

[35]  A. Vermeer.  Coming to grips with lexical richness in spontaneous speech data , 2000 .

[36]  Jan Avent,et al.  Reciprocal scaffolding: A context for communication treatment in aphasia , 2003 .

[37]  Edgar Erdfelder,et al.  G*Power 3: A flexible statistical power analysis program for the social, behavioral, and biomedical sciences , 2007, Behavior research methods.

[38]  H. Brownell,et al.  Discourse ability and brain damage : theoretical and empirical perspectives , 1990 .

[39]  A. J. North,et al.  Production of narrative and procedural discourse in aphasia , 1981, Brain and Language.

[40]  M. Grossman,et al.  Trying to tell a tale , 2006, Neurology.

[41]  H. Wright,et al.  Manipulating task instructions to change narrative discourse performance , 2009 .

[42]  A. Raymer,et al.  Changes in aphasic discourse after contrasting treatments for anomia , 2008 .

[43]  E. Armstrong,et al.  Aphasic discourse analysis: The story so far , 2000 .

[44]  R. C. Marshall,et al.  Using semantic feature analysis to improve contextual discourse in adults with aphasia. , 2008, American journal of speech-language pathology.

[45]  R S Chapman,et al.  Communication breakdowns in normal and language learning-disabled children's conversation and narration. , 1988, The Journal of speech and hearing disorders.

[46]  Sergio Carlomagno,et al.  Age-related Differences in the Production of Textual Descriptions , 2005, Journal of psycholinguistic research.

[47]  Cheryl A. Engber.  The relationship of lexical proficiency to the quality of ESL compositions , 1995 .

[48]  Valarie B. Fleming,et al.  Communication Wellness Check‐Up©: Age‐related changes in communicative abilities , 2008 .

[49]  P V Cooper,et al.  Discourse production and normal aging: performance on oral picture description tasks. , 1990, Journal of gerontology.

[50]  Scott Jarvis,et al.  vocd: A theoretical and empirical evaluation , 2007 .

[51]  T. L. Brink,et al.  Screening tests for geriatric depression , 1982 .

[52]  I. T. Draper.  THE ASSESSMENT OF APHASIA AND RELATED DISORDERS , 1973 .

[53]  Marilyn Newhoff,et al.  Measures of lexical diversity in aphasia , 2003 .

[54]  Scott Jarvis,et al.  Short texts, best-fitting curves and new measures of lexical diversity , 2002 .

[55]  Lynn Hasher,et al.  Age-related differences in cognition: the role of distraction control. , 2008, Neuropsychology.

[56]  Andrew Mellor,et al.  Distinctiveness : a new measure of lexical diversity , 2006 .

[57]  G. Olness.  Genre, verb, and coherence in picture‐elicited discourse of adults with aphasia , 2006 .

[58]  S. Folstein,et al.  "Mini-mental state". A practical method for grading the cognitive state of patients for the clinician. , 1975, Journal of psychiatric research.

[59]  M. O’Neill.  Here, ‘I’ am , 2008 .

[60]  Martha Taylor Sarno,et al.  Assessment of Aphasia and Related Disorders , 1973 .

[61]  C. Lustig,et al.  Inhibitory Mechanisms and the Control of Attention , 2007 .

[62]  S. Chapman,et al.  Narrative and Procedural Discourse in Aphasia , 1990 .

[63]  R. N. Indah.  Language and Speech , 1958, Nature.

[64]  Diana L. Hughes,et al.  Guide to Narrative Language: Procedures for Assessment , 1997 .

[65]  Susan Kemper,et al.  Telling stories: The structure of adults' narratives , 1990 .