My collaborators and I have a new paper out in Applied Psycholinguistics. This study examines word processing in Finnish speakers in order to explore questions about the factors that influence the speed of lexical recognition. Finnish provides a unique opportunity to investigate stem allomorphy, which is variation in word stems across different forms of the word, such as foot and feet in English. Finnish has rich stem allomorphy, with some words consisting of 3 or 4 stem allomorphs.
In a previous paper, Nikolaev et al. (2014) showed that words with higher stem allomorphy were recognized more quickly than words with lower stem allomorphy. However, there was a confound with allomorphy in that words with higher stem allomorphy tend to come from an unproductive inflectional class (in other words, new words are not created using those word forms) while words with lower stem allomorphy tend to come from a productive inflectional class. In the newly published study, we sought to disentangle the effects of stem allomorphy and inflectional productivity by including a third type of words which has low stem allomorphy but comes from an unproductive class.
The results replicated Nikolaev et al. (2014), showing that participants recognized words with higher stem allomorphy faster than words with lower stem allomorphy. Furthermore, we ruled out the potential contribution of productivity of inflectional class as a predictor of word recognition speed.
This study provided the basis for two follow-up studies. In the first, we compared healthy older adults and people with Mild Cognitive Impairment and Alzheimer’s dementia to determine whether the factors affecting word recognition (including stem allomorphy) change in pathological aging. This paper is currently under a second round of reviews at Cortex. The second study examines cortical structure in the same older adult groups and their relation to the processing of stem allomorphy differences. This paper is currently in preparation.
For a free PDF of the article, click here.
I am excited to have a book chapter with Loraine Obler and Dalia Cahana-Amitay on brain and language in aging in the newly published Handbook of Communication Disorders, edited by Amalia Bar-On and Dorit Ravid. The handbook offers a rich collection of papers on language acquisition and language decline, literacy, as well as the effects of socioeconomic status, multilingualism, and speech and hearing impairments on language learning and use, among many other interesting and relevant topics.
The journal Linguistic Approaches to Bilingualism has just published our article titled “Length of residence: Does it make a difference in older bilinguals?” as an Online-first article. http://doi.org/10.1075/lab.15001.hig
In this article we explore three factors that may affect second-language (L2) attainment: the length of time spent living in a country where the L2 is spoken, the age at which the L2 was first learned, and the age at which the person’s L2 skills are tested. The first two factors have often been studied in second language acquisition research, but the third variable (age at testing) is usually ignored. In this article we argue that there are important reasons to consider age a potentially important/influential factor given the research showing cognitive and language declines in older adults. We reviewed a set of studies that included length of residence as a potential factor in accounting for individual differences in L2 attainment. We divided the studies into those that included bilinguals who were all under the age of 55 and those that included some bilinguals over 55. Although there were only a small number of studies that included older adults, the findings suggest that when older adults are included in the sample, there is less chance that a positive effect of LOR on L2 attainment is found (in other words, longer LOR is not associated with better L2 performance). By contrast, studies that included only younger adults reported a positive effect of LOR more often than no effect of LOR. We suggest that detrimental effects of aging on language and cognition may be counteracting the positive effects of length of residence and that aging should not be overlooked as a potentially influential variable in studies of second language acquisition.
A pre-print version of the article can be found on my Research Gate profile here.
I’m delighted to announce that an article I worked on with members of the Language in the Aging Brain Lab at the Boston VA Hospital has just been published online! The article is titled “How older adults use cognition in sentence-final word recognition” and it is published in the journal Aging, Neuropsychology, and Cognition.
The study looked at how individual differences in executive control and working memory affected older adults’ ability to understand words at the end of sentences. The words varied in their degree of predictability and in the degree of noise they were placed in. The main finding was that better inhibitory control led to better word recognition.
Would you like to read a copy of the article? The first 50 people who use this link will get a free copy: http://www.tandfonline.com/eprint/9uMGCVIzHFznG8fTR5xp/full. Or you are welcome to email me at email@example.com.