What an interesting idea! The latest issue of the Journal of Speech, Language, and Hearing Research (October, 2015) contains a very interesting article entitled, “A Novel Pupillometric Method for Indexing Word Difficulty in Individuals With and Without Aphasia” by Laura R. Chapman and Brooke Hallowell. Oversimplified, the researchers looked at changes in subjects’ pupils related to the degree of effort put forth to process single words.
Wouldn’t it be interesting to investigate the effort put forth by children to retrieve words? If this non-invasive method can be used to measure cognitive effort, we might begin to learn why word finding is so very difficult for certain children. Rather than just look at speed and accuracy of retrieval, we might learn about effort.
I also learned from the article that there is a growing body of evidence to support the idea that age of acquisition of words may be a factor in processing. Again, could age of acquisition be a factor in retrieval?
So many questions, so much potential for research! How exciting to think we could find answers to some of these complicated questions. So, you PhD candidates out there…consider this for a dissertation!
A growing body of literature supports the notion that age of acquisition may be a critical factor in single-word processing that is masked by the more commonly used word frequency measures
In summary, results of this study provide preliminary evidence that pupillometry can be used to capture cognitive effort involved in processing easy and difficult single words in people with and without aphasia. To our knowledge, there is no prior published study of pupillometric methods applied to auditory language processing in people with aphasia. Results also are the first to demonstrate differences in the effort involved in processing single words without an additional task, such as naming or lexical decisions