Can’t See the Words for the Letters: Whole Word Processing in Adolescents and a Novel “Visual” Intervention for Dyslexia

<p>Individuals with developmental dyslexia, considered as a group, perform poorly on tasks that involve phonological analysis, such as applying sight-sound rules to read new words, or analysing words into their component sounds (De Groot, Huettig, & Olivers, 2016; Temple & Marshall, 1983). However, dyslexia is also associated with other types of difficulties. For example, in some individuals, reading latencies increase disproportionately with the length of the word (De Luca, Barca, Burani, & Zoccolotti, 2008; Spinelli et al., 2005) suggesting they may have difficulties recognising familiar words as whole units (“whole word” processing). This thesis examined the relationship between the word length effect and overall reading proficiency in a diverse sample of 49 adolescents. We found that the length effect was a unique predictor of reading proficiency, even after factoring out variance in phonological skills (measured using a nonword reading task). We also tested the recent hypothesis that visual attention span - the number of letters a reader can capture in a single glance - is important for efficient whole word reading (Bosse, Tainturier, & Valdois, 2007). Contrary to this hypothesis, we found no association between the word length effect and scores on a standard measure of visual attention span (a partial report task). We also explored whether reading-delayed adolescents could benefit from an intervention targeting their specific cognitive profile. Five cases demonstrating a selective difficulty with either “phonological” or “whole word” skills completed two interventions. One targeted phonological skills: participants were trained to recognise and apply common sight-sound correspondences. The other targeted whole word skills: we reasoned that training participants to recognise commonly-occurring letter redundancies (e.g. ogue: rogue, synagogue, dialogue) could reduce the load on parallel letter processing. Only one of the five cases showed greater improvement in (untrained) word reading accuracy following their “target” intervention. However, four of the five showed intervention-specific improvements in reading latency. These results suggest that it could be valuable to consider heterogeneity when treating reading delay.</p>

Can’t See the Words for the Letters: Whole Word Processing in Adolescents and a Novel “Visual” Intervention for Dyslexia

<p>Individuals with developmental dyslexia, considered as a group, perform poorly on tasks that involve phonological analysis, such as applying sight-sound rules to read new words, or analysing words into their component sounds (De Groot, Huettig, & Olivers, 2016; Temple & Marshall, 1983). However, dyslexia is also associated with other types of difficulties. For example, in some individuals, reading latencies increase disproportionately with the length of the word (De Luca, Barca, Burani, & Zoccolotti, 2008; Spinelli et al., 2005) suggesting they may have difficulties recognising familiar words as whole units (“whole word” processing). This thesis examined the relationship between the word length effect and overall reading proficiency in a diverse sample of 49 adolescents. We found that the length effect was a unique predictor of reading proficiency, even after factoring out variance in phonological skills (measured using a nonword reading task). We also tested the recent hypothesis that visual attention span - the number of letters a reader can capture in a single glance - is important for efficient whole word reading (Bosse, Tainturier, & Valdois, 2007). Contrary to this hypothesis, we found no association between the word length effect and scores on a standard measure of visual attention span (a partial report task). We also explored whether reading-delayed adolescents could benefit from an intervention targeting their specific cognitive profile. Five cases demonstrating a selective difficulty with either “phonological” or “whole word” skills completed two interventions. One targeted phonological skills: participants were trained to recognise and apply common sight-sound correspondences. The other targeted whole word skills: we reasoned that training participants to recognise commonly-occurring letter redundancies (e.g. ogue: rogue, synagogue, dialogue) could reduce the load on parallel letter processing. Only one of the five cases showed greater improvement in (untrained) word reading accuracy following their “target” intervention. However, four of the five showed intervention-specific improvements in reading latency. These results suggest that it could be valuable to consider heterogeneity when treating reading delay.</p>

EXPRESS: Improving reading rate prediction with word length information: Evidence from Dutch

Previous research in English has suggested that reading rate predictions can be improved considerably by taking average word length into account. In the present study, we investigated whether the same regularity holds for Dutch. The Dutch language is very similar to English, but words are on average half a letter longer: 5.1 letters per word (in non-fiction) instead of 4.6. We collected reading rates of 62 participants reading 12 texts with varying word lengths, and examined which change in the English equation accounts for the Dutch findings. We observed that predictions were close to the best fitting curve as soon as the average English word length was replaced by the average Dutch word length. The equation predicts that Dutch texts with an average word length of 5.1 letters will be read at a rate of 238 word per minute (wpm). Texts with an average word length of 4.5 letter will be read at 270 wpm, and texts with an average word length of 6.0 letters will be read at a rate of 202 wpm. The findings are in line with the assumption that the longer words in Dutch do not slow down silent reading relative to English and that the word length effect observed in each language is due to word processing effort and not to low-level, visual factors.

Improving reading rate prediction with word length information: Evidence from Dutch

Previous research in English has suggested that reading rate predictions can be improved considerably by taking average word length into account. In the present study, we investigated whether the same regularity holds for Dutch. The Dutch language is very similar to English, but words are on average half a letter longer: 5.1 letters per word (in non-fiction) instead of 4.6. We collected reading rates of 62 participants reading 12 texts with varying word lengths, and examined which change in the English equation accounts for the Dutch findings. We observed that predictions were close to the best fitting curve as soon as the average English word length was replaced by the average Dutch word length. The equation predicts that Dutch texts with an average word length of 5.1 letters will be read at a rate of 238 word per minute (wpm). Texts with an average word length of 4.5 letter will be read at 270 wpm, and texts with an average word length of 6.0 letters will be read at a rate of 202 wpm. The findings are in line with the assumption that the longer words in Dutch do not slow down silent reading relative to English and that the word length effect observed in each language is due to word processing effort and not to low-level, visual factors.

A-184 Comparison of Performance on the Virtual Environment Grocery Store and the CVLT-II

Objective The Virtual Environment Grocery Store (VEGS) was created to measure memory and everyday functional abilities (Parsons & McMahan, 2017). The objective of this study was to compare young adults’ recall of the VEGS shopping list with the CVLT-II in order to investigate what impact the virtual environment has on recall. Methods Young adults (ages 18–26, M = 18.90, SD = 1.60; N = 39) completed the VEGS and the CVLT-II. Results Young adults had higher recall on the CVLT-II than VEGS for immediate recall and delayed free recall, but there were no differences on delayed cued recall and delayed recognition. Conclusion Immediate and delayed free recall on the VEGS may be more difficult on the VEGS than the CVLT-II, perhaps reflecting the word length effect. The virtual environment may have allowed for deeper levels of processing, explaining the lack of differences on delayed cued recall and delayed recognition.