Working Memory and Mental Imagery

• Mental imagery training enhances comprehension and is easy to teach
• Pronouns provide cohesion and coherence for text comprehension

I have just returned from recreation leave and read an interesting article entitled 'Effect of imagery training on children's comprehension of pronouns' by Francey and Cain, two researchers from Lancaster University, United Kingdom.  The researchers were investigating children with good and poor listening comprehension, and their ability to identify the antecedents of personal pronouns in individual sentences and also to select the most appropriate pronoun in a story close activity.

Normally, as they read,  good comprehenders will construct an integrated situation model of the perceived sentence and story meanings as a cohesive and coherent mental representation. What usually underpins this process is the resolution of pronouns with their antecedents in the same sentence or previous sentences. Pronouns such as 'he', 'she', 'they' or 'it' are strategic in integrating information within and between sentences. This, however, may require the reader to use extra mental resources to make inferences particularly in situations where 'he' refers to one of two protagonists in the previous sentence. Poor comprehenders often have considerable difficulty with this process and consequently have difficulty with text integration and comprehension of the text discourse.

Good readers tend to generate mental imagery as they read, which benefits their text recall and extends their capacity to hold information while processing text during reading. Poor readers, on the other hand, seldom generate mental imagery while reading. However, in my own research I have found that imagery training is relatively easy and enjoyable for struggling readers. It is assumed that by generating mental imagery during reading the reader is enabled to carry over complex ideas embedded within an image while, for example, decoding, connecting text propositions, making inferences across text and linking ideas to the reader's background  experiences. Thus, mental imagery enhances working memory efficiency by utilising the visual mode of working memory to enhance the ability of the poor comprehender to retain detailed information.

The research findings confirm the notion that poor comprehenders have difficulties with language comprehension apart from decoding. Most poor comprehenders have good decoding but have poor language comprehension and this can be evidenced in the fact that they have significantly more difficulty with pronoun resolution. The research demonstrates that minimal mental imagery training can improve the reading comprehension performance of students with poor comprehension. Another finding is that there is strong evidence to support the notion that pronouns play a crucial role in comprehension and the construction of a cohesive and coherent understanding of text ideas. The findings of this study also give some support for Paivio's (1991) Dual Coading theory of cognition.

Francey, G., Cain, K. (2015). Effect of imagery training on children’s comprehension of pronouns. Journal of Educational Research, 108 (1) p. 1 – 9.

Paivio, A. (1986). Mental representations: A dual-coding approach. New York: Holt, Rinehart & Winston.

Visualizing and Reading Comprehension Pt1

This is the first part in a 12 part series on using a visualising strategies to develop reading comprehension. 

When readers read and comprehend written text and they develop what is sometimes referred to as a situation model. A situation model uses information that the reader brings to the task of reading and combines this with the new text-based information to build comprehension. Thus, readers construct an interpretation (or situation model) of what they are reading by combining information from their background knowledge together with information extracted from the print. The new information that is processed in working memory may be visual, verbal, or a combination of both. The two modes if information are in a reciprocal relationship, for example, if one thinks of a word one can form a picture of that word and if one imagines a picture a number of associated words will be evoked. This means that when the two modes are linked more items can be chunked together and stored in working memory.

It is the linking of words with pictures that will enable a more efficient use of working memory resulting in better reading comprehension. The two modes complement one another but function quite differently, for example, the verbal system is linear and sequential. To remember a number of words or numbers a person needs to repeatedly rehearse them in the order in which they were encoded so that the impressions are maintained in working memory. In contrast, visual memory temporarily stores all their items in the form of a holistic image in which the items are placed in a spatial relationship to one another. Within this image individual items can be accessed by zooming in or out or in different directions. When the representations are connected comprehension will be enhanced because information can be more easily accessed and retrieved.

If one is able to describe an object in detail the better will be the associated mental image because it holds more information and has more links to verbal information. One way to develop the descriptive words is to place an unseen object in a bag and have the learner described the object so that the listener can guess what the object is. Children often have a great deal of difficulty finding the best words to use to describe the unseen object. Most children need to be shown how to describe an object. For example, by using words that are related by; size such as large or huge, or by texture such as rough or smooth.

Another fun way to develop language is to use the game, " Guess Who'.  In this game the learner  has two think of words to fit into, "Does  your person have...? This is a simple type of language game and a good way to introduce some basic vocabulary.

In the next blog I will be discussing the development of language skills using other types of barrier games.