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At least 973 records · Page 54Linked to original sources
PubMed2004

Competing for a desired reward in the Stroop task: when attentional control is unconscious but effective versus conscious but ineffective.

Recent studies using Stroop's paradigm have shown that word recognition processes can be controlled when the local context of the task is manipulated. In the present study, factors related to the participants' broader context (i.e., presence vs. absence of a competitor and of a desired reward) were manipulated. The results (1) support the conclusion that control of semantic-level activation can be unconscious but effective versus conscious but ineffective, (2) suggest that unconscious control alone operates on line (i.e., when the participant is responding), and (3) clarify the impact of socio-contextual factors that have been confounded in past research. Taken together, these findings strengthen the view that word recognition processes are controllable and offer new reasons to pay constant attention to the social environment of cognition.

Analysis of Variance↗
PubMed2000

Lexical processing and text integration of function and content words: evidence from priming and eye fixations.

The results of two experiments comparing processing of function words and content words are reported. In Experiment 1, priming was present for both related function and related content word pairs, as measured in lexical decision response times. In Experiment 2, participants' eye movements were monitored as they read sentences containing either a high- or a low-frequency function or content target word. Average word length and word frequency were matched across the function and content word conditions. Function words showed frequency effects in first-fixation and gaze duration that were similar to those seen for content words. Clear differences in on-line processing of function and content words emerged in later processing measures. These differences were reflected in reading patterns and reading time measures. There was inflated processing time in the phrase immediately following a low-frequency function word, and participants made more regressions to the target word in this condition than in the other three conditions. The priming effects in lexical decision and the word frequency effects in initial processing measures in silent reading for both word types were taken as evidence of common lexical processing for function and content words. The observed differences in later processing measures in the eye-movement data were taken as evidence of differences in the role that the two word types have in sentence processing beyond the lexical level.

Attention↗
PubMed1991

Deficit to stimulus-centered, letter shape representations in a case of "unilateral neglect".

A brain-damaged subject is described whose pattern of performance in various reading tasks can be explained by proposing damage at a level of the word recognition process in which a representation with stimulus-centered, rather than retinal- or word-centered, coordinates is processed. Analysis of her reading performance as a function of topographical arrangement of letters, position of errors in the letter string, and the effects of letter spacing and of adding a prefix or suffix provide evidence not only for the existence of this level of representation (the letter-shape map in a model proposed by Caramazza and Hillis [3]), but also for specific assumptions about its functioning and structure.

Attention↗
PubMed2001

The role of visual and auditory temporal processing in reading irregular and nonsense words.

In the present study, the role of rapid visual and auditory temporal processing in reading irregular and nonsense words was investigated with a group of normal readers. One hundred and five undergraduates participated in various visual and auditory temporal-processing tasks. Readers who primarily adopted the phonological route in reading (nonsense-word readers) showed a trend for better auditory temporal resolution but readers who primarily adopted sight word skills (irregular-word readers) did not exhibit better visual temporal resolution. Both the correlation and stepwise multiple-regression analyses, however, revealed a relationship between visual temporal processing and irregular-word reading as well as a relationship between auditory temporal processing and nonsense-word reading. The results support the involvement of visual and auditory processing in reading irregular and nonsense words respectively, and were discussed with respect to recent findings that only dyslexics with phonological impairment will display temporal deficits. Further, the temporal measures were not effective discriminants for the reading groups, suggesting a lack of association between reading ability and the choice of reading strategy.

Adolescent↗
PubMed2004

The time and space of lexicality: a neuromagnetic view.

Illuminating the neural mechanisms subserving lexico-semantic processing is requisite to further understanding the neurophysiological basis of the dyslexias. Yet, despite numerous functional neuroimaging experiments, the location and temporal behavior of brain regions mediating word-level language processing remain an area of debate. Such investigations typically utilize the word/pseudoword contrast within hemodynamic measurements, and report several left hemisphere regions that respond more strongly to pseudowords but fail to replicate neural areas unique to real word processing. The present experiment addressed this problem from a different perspective. Mainly, we hypothesized that the time course, but not the neuroanatomy, would show within-subject across-condition disparities. For that purpose, we applied dipole-modeling techniques to high-density magnetoencephalographic recordings of healthy subjects, and utilized excellent spatiotemporal accuracy to demonstrate significant across-condition differences in the time domain, along with indistinguishable neural correlates within-subject. In all participants, both words and pseudowords elicited activity in left perisylvian language areas, with words consistently activating these regions approximately 100 ms earlier than pseudowords. Considerable functional heterogeneity was also observed, and this might underlie the inconsistencies among previous studies. We conclude that the neural distinction in word/pseudoword processing is not in spatial localization, but is better conceptualized as a dynamic difference in processing time.

Adolescent↗
PubMed1989

Word attributes and lateralization revisited: implications for dual coding and discrete versus continuous processing.

Three attributes of words are their imageability, concreteness, and familiarity. From a literature review and several experiments, I previously concluded (Boles, 1983a) that only familiarity affects the overall near-threshold recognition of words, and that none of the attributes affects right-visual-field superiority for word recognition. Here these conclusions are modified by two experiments demonstrating a critical mediating influence of intentional versus incidental memory instructions. In Experiment 1, subjects were instructed to remember the words they were shown, for subsequent recall. The results showed effects of both imageability and familiarity on overall recognition, as well as an effect of imageability on lateralization. In Experiment 2, word-memory instructions were deleted and the results essentially reinstated the findings of Boles (1983a). It is concluded that right-hemisphere imagery processes can participate in word recognition under intentional memory instructions. Within the dual coding theory (Paivio, 1971), the results argue that both discrete and continuous processing modes are available, that the modes can be used strategically, and that continuous processing can occur prior to response stages.

Adult↗
PubMed2006

Testing the two-cycle model by different word types.

The two-cycle model assumes that consonants in words are processed more quickly than vowels. This study tested the two-cycle model with different word types using a priming task which presented consonants or vowels before the target. Analysis showed presenting consonants before the target was beneficial in processing the target for the words with the letter compositions of CWC and CVCV. In contrast, presenting vowels before the target was beneficial for the words with the letter composition of VCVC. The words with the letter composition of VCCV showed no difference between the consonant prime and the vowel prime. The two-cycle model was not supported across all types of words.

Humans↗
PubMed2001

Lexical representation and processing of morphologically complex words: evidence from the reading performance of an Italian agrammatic patient.

The study of patients with acquired language disorders has provided crucial evidence for contemporary theories on mental lexical representation. This is particularly true for the representation of morphologically complex words. In this paper we analyzed the performance of a patient (M.B.) affected by agrammatism and dyslexia. M.B. was required to read aloud simple and morphologically complex words. The patient's pattern of errors was interpreted as the result of a predominant use of the lexical routine (phonological dyslexia). Three reading tasks were developed which allowed us to test M.B.'s ability to read morphologically complex words (reading of regular and irregular plurals; reading of high- and low-frequency singular and plural nouns; reading of evaluative suffixes). Errors were determined by frequency effect rather than by type of suffix (i.e., inflectional or derivational). High-frequency morphologically complex items seemed to meet stored representations, thus avoiding the parsing procedures that are required for less frequent items. These results are in keeping with dual route models of lexical representation of morphologically complex words.

Adult↗
PubMed2000

[Experiences with a current speech recognition system in creating cardiology reports].

Development of speech recognition software is at a stage where you can use it effectively for creating cardiological reports or at least parts of it. We were very successful in using the Dragon Naturally Speaking system for our reports and we don't need a secretary for our writings any longer. Very important for effective work is a fast and good PC hardware, especially a good sound system and a sufficient amount of internal memory, also important is patience of the user, because a longer training phase is required. I recommend for own experiences to use the standard version which is cheap and includes all necessary features. Following some fundamental rules anyone can be successful with speech recognition. Development of speech recognition is increasing rapidly so that everyone of us will get in contact with it sooner or later, it would be better to be prepared for it now.

Cardiology↗
PubMed1992

The long-term modality effect: in search of differences in processing logographs and alphabetic words.

The visual superiority effect (a reverse long-term modality effect) has been consistently found with Chinese logographs. For its explanation in terms of script differences, it has been believed that lexical access is more direct or quicker for Chinese logographs than for alphabetic words. It has also been believed that Chinese logographs are more unique in shape or more discriminable than alphabetic words. Finally, Chinese logographs have been considered to facilitate recall through their graphic features that classify Chinese words into categories. The results of Experiments 1-5 show that these three assumptions can be ruled out. The results of Experiments 6-10, on the other hand, support the long-term priming interpretation of the visual superiority effect, which explains (a) why the visual superiority effect can be consistently obtained for recall of Chinese words by Chinese subjects, (b) why the effect cannot be consistently obtained for recall of English words by Western subjects, (c) why the effect can be also obtained for recall of English words by Chinese subjects, (d) why the effect can be easily obtained for recall of a set of words, but not for recall of a different set of words by Chinese subjects, and (e) why the effect can be easily obtained from Chinese subjects speaking a dialect that is different from Mandarin.

Adult↗
PubMed1985

Size in the visual processing of faces and words.

We studied the influence of variations of stimulus size upon recognition of words and faces. Size played an important role in the recognition of faces but was irrelevant to the recognition of words, over a range of sizes. More detailed analysis revealed that although irrelevant to recognition, size of words was nevertheless encoded, with some consequences similar to those for recognition of faces. The results were interpreted in terms of stimulus-specific analyses, and this view was contrasted with other notions of mental representation.

Face↗
PubMed2004

Modeling the effects of choice-set size on the processing of letters and words.

Letters and words are better identified when there are fewer available choices. How do readers use choice-set restrictions? By analyzing new experimental data and previously reported data, the author shows that Bayes theorem-based models overestimate readers' use of choice-set restrictions. This result is discordant with choice-similarity models such as R. D. Luce's (1963a) similarity choice model, G. Keren and S. Baggen's (1981) letter recognition model, and D. W. Massaro and G. C. Oden's (1979) fuzzy logical model of perception. Other models posit that choice restrictions affect accuracy only by improving guessing (e.g., J. L. McClelland & D. E. Rumelhart's, 1981, interactive activation model). It is shown that these models underestimate readers' use of choice-set restrictions. Restriction of choice set does improve perception of letters and words, but not optimally. Decision models that may be able to explain this phenomenon are discussed.

Attention↗