Interplay between computational models and cognitive electrophysiology in visual word recognition

2007 ◽  
Vol 53 (1) ◽  
pp. 98-123 ◽  
Author(s):  
Horacio A. Barber ◽  
Marta Kutas
Author(s):  
Manuel Perea ◽  
Victoria Panadero

The vast majority of neural and computational models of visual-word recognition assume that lexical access is achieved via the activation of abstract letter identities. Thus, a word’s overall shape should play no role in this process. In the present lexical decision experiment, we compared word-like pseudowords like viotín (same shape as its base word: violín) vs. viocín (different shape) in mature (college-aged skilled readers), immature (normally reading children), and immature/impaired (young readers with developmental dyslexia) word-recognition systems. Results revealed similar response times (and error rates) to consistent-shape and inconsistent-shape pseudowords for both adult skilled readers and normally reading children – this is consistent with current models of visual-word recognition. In contrast, young readers with developmental dyslexia made significantly more errors to viotín-like pseudowords than to viocín-like pseudowords. Thus, unlike normally reading children, young readers with developmental dyslexia are sensitive to a word’s visual cues, presumably because of poor letter representations.


2014 ◽  
Vol 17 ◽  
Author(s):  
María Macaya ◽  
Manuel Perea

AbstractThe study of the effects of typographical factors on lexical access has been rather neglected in the literature on visual-word recognition. Indeed, current computational models of visual-word recognition employ an unrefined letter feature level in their coding schemes. In a letter recognition experiment, Pelli, Burns, Farell, and Moore-Page (2006), letters in Bookman boldface produced more efficiency (i.e., a higher ratio of thresholds of an ideal observer versus a human observer) than the letters in Bookman regular under visual noise. Here we examined whether the effect of bold emphasis can be generalized to a common visual-word recognition task (lexical decision: “is the item a word?”) under standard viewing conditions. Each stimulus was presented either with or without bold emphasis (e.g., actor vs. actor). To help determine the locus of the effect of bold emphasis, word-frequency (low vs. high) was also manipulated. Results revealed that responses to words in boldface were faster than the responses to the words without emphasis –this advantage was restricted to low-frequency words. Thus, typographical features play a non-negligible role during visual-word recognition and, hence, the letter feature level of current models of visual-word recognition should be amended.


Linguistics ◽  
2019 ◽  
Author(s):  
Melvin J. Yap

Words are the building blocks of language, and visual word recognition is a crucial prerequisite for skilled reading. Before we can pronounce a word or understand what it means, we have to first recognize it (i.e., the visually presented word makes contact with its underlying mental representation). Although several tasks have been developed to tap word recognition performance, researchers have primarily relied on lexical decision (classifying letter strings as words or nonwords), speeded pronunciation (reading a word or nonword aloud), and semantic classification (e.g., classifying a word as animate or inanimate). Despite the apparent ease of visual word recognition, the processes that support the mapping of spelling-to-sound and spelling-to-meaning are far from perfectly understood and remain the object of active investigations. Beyond shedding light on reading, literacy, and language development, the visual word recognition literature has helped inform our understanding of other cognitive domains (e.g., pattern recognition, attention, memory), while propelling advances in computational modeling and cognitive neuroscience. Because words can be coded and analyzed at multiple levels (e.g., orthography, phonology, semantics), much of empirical research has explored the functional relationships between orthographic, phonological, and semantic variables and word recognition performance across lexical processing tasks. In addition to studying the recognition of isolated words, there is a rich literature examining how different prime contexts influence the processing of subsequently presented words. Such primes can be orthographically, phonologically, semantically, or morphologically related to targets and are either visible or masked (i.e., presented so briefly that conscious perception is minimized). Turning to methodology, although the classical factorial design continues to dominate word recognition research, an increasing amount of work has been leveraging on the megastudy approach, whereby researchers examine word recognition performance for large sets of words, which are defined by the language rather than by the experimenter. Collectively, the basic findings from the isolated and primed visual word recognition performance have been used to develop and constrain increasingly powerful computational models of word recognition and task performance. Moving forward, the visual word recognition literature is likely to be increasingly characterized by studies that rely on powerful analytical tools (e.g., linear mixed effects analyses, analysis of response time distributions) and which give more consideration to the role of individual differences. Finally, in light of space constraints, this article focuses on references that deal with how visually presented English words are recognized. There is an important and growing literature that explores the lexical processing of other alphabetic (e.g., Spanish, French, German) and nonalphabetic (e.g., Chinese, Korean) languages and the interplay between languages in the multilingual lexicon.


2010 ◽  
Vol 5 (3) ◽  
pp. 371-400 ◽  
Author(s):  
Jay Rueckl

This paper provides a review of the connectionist perspective on the role of morphology in visual word recognition. Several computational models of morphological effects in reading are described and relationships between these models, models of past tense production, and models of other aspects of word recognition are traced. Limitations of extant models are noted, as are some of the technical challenges that must be solved to develop the next generation of models. Finally, some directions for future research are identified.


2012 ◽  
Vol 35 (5) ◽  
pp. 263-279 ◽  
Author(s):  
Ram Frost

AbstractIn the last decade, reading research has seen a paradigmatic shift. A new wave of computational models of orthographic processing that offer various forms of noisy position or context-sensitive coding have revolutionized the field of visual word recognition. The influx of such models stems mainly from consistent findings, coming mostly from European languages, regarding an apparent insensitivity of skilled readers to letter order. Underlying the current revolution is the theoretical assumption that the insensitivity of readers to letter order reflects the special way in which the human brain encodes the position of letters in printed words. The present article discusses the theoretical shortcomings and misconceptions of this approach to visual word recognition. A systematic review of data obtained from a variety of languages demonstrates that letter-order insensitivity isneithera general property of the cognitive systemnora property of the brain in encoding letters. Rather, it is avariantand idiosyncratic characteristic of some languages, mostly European, reflecting a strategy of optimizing encoding resources, given the specific structure of words. Since the main goal of reading research is to develop theories that describe thefundamental and invariantphenomena of reading across orthographies, an alternative approach to model visual word recognition is offered. The dimensions of a possible universal model of reading, which outlines the common cognitive operations involved in orthographic processing in all writing systems, are discussed.


Author(s):  
Diane Pecher ◽  
Inge Boot ◽  
Saskia van Dantzig ◽  
Carol J. Madden ◽  
David E. Huber ◽  
...  

Previous studies (e.g., Pecher, Zeelenberg, & Wagenmakers, 2005) found that semantic classification performance is better for target words with orthographic neighbors that are mostly from the same semantic class (e.g., living) compared to target words with orthographic neighbors that are mostly from the opposite semantic class (e.g., nonliving). In the present study we investigated the contribution of phonology to orthographic neighborhood effects by comparing effects of phonologically congruent orthographic neighbors (book-hook) to phonologically incongruent orthographic neighbors (sand-wand). The prior presentation of a semantically congruent word produced larger effects on subsequent animacy decisions when the previously presented word was a phonologically congruent neighbor than when it was a phonologically incongruent neighbor. In a second experiment, performance differences between target words with versus without semantically congruent orthographic neighbors were larger if the orthographic neighbors were also phonologically congruent. These results support models of visual word recognition that assume an important role for phonology in cascaded access to meaning.


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