Syllabic Frequency Research Articles

Effects of transposed letter similarity and syllabic frequency in Brazilian Portuguese.

Effects of transposed letter similarity and syllabic frequency in Brazilian Portuguese.

The role of sublexical variables in reading fluency development among Spanish children.

Several studies have found that, after repeated exposure to new words, children form orthographic representations that allow them to read those words faster and more fluently. However, these studies did not take into account variables related to the words. The aim of this study was to investigate the influence of sublexical variables on the formation of orthographic representations of words by Spanish children. The first experiment used pseudo-words of varying syllabic structure and syllabic frequency. The stimuli for the second experiment were formed with or without context-dependent graphemes. We found that formation of orthographic representations was influenced by syllabic structure (easier for words with simple syllabic structure) and the context-dependency of graphemes (easier in the absence of context-dependent graphemes), but not syllabic frequency. These results indicate that the easier it is to read a word, the easier it is to form an orthographic representation of it.

Supplemental Material for Effects of Transposed Letter Similarity and Syllabic Frequency in Brazilian Portuguese

Supplemental Material for Effects of Transposed Letter Similarity and Syllabic Frequency in Brazilian Portuguese

Lexical and sublexical effects on visual word recognition in Greek: comparing human behavior to the dual route cascaded model

ABSTRACTWe evaluated the dual route cascaded (DRC) model of visual word recognition using Greek behavioural data on word and nonword naming and lexical decision, focusing on the effects of syllable and bigram frequency. DRC was modified to process polysyllabic Greek words and nonwords. The Greek DRC and native speakers of Greek were presented with the same sets of word and nonword stimuli, spanning a wide range on several psycholinguistic variables, and the sensitivity of the model to lexical and sublexical variables was compared to the effects of these factors on the behavioural data. DRC pronounced correctly all the stimuli and successfully simulated the effects of frequency in words, and of length and bigram frequency in nonwords. However, unlike native speakers of Greek, DRC failed to demonstrate sensitivity to word length and syllabic frequency. We discuss the significance of these findings in constraining models of visual word recognition.

Formation of Orthographic Representations in Spanish Dyslexic Children: The Role of Syllable Complexity and Frequency.

Recent studies have suggested that Spanish children with dyslexia have difficulty storing orthographic representations of new words. But given that the syllable plays an important role in word recognition in Spanish, it is possible that the formation of orthographic representations is influenced by the characteristics of the syllables that make up the words. The objective of this study was to determine whether syllabic frequency and syllabic complexity influence orthographic learning in children with dyslexia. We compared the performance of a group of dyslexic children with that of a group of typical readers on a task that involved reading short and long pseudowords six times; we manipulated the frequency and complexity of the syllables from which the pseudowords were constructed. The results showed that dyslexic children do not benefit from syllabic simplicity or frequency when it comes to storing orthographic representations as the length effect in the dyslexic group remained was unchanged after repeated readings, regardless of stimulus characteristics. Copyright © 2017 John Wiley & Sons, Ltd.

Syllable frequency and word frequency effects in spoken and written word production in a non-alphabetic script

The effects of word frequency (WF) and syllable frequency (SF) are well-established phenomena in domain such as spoken production in alphabetic languages. Chinese, as a non-alphabetic language, presents unique lexical and phonological properties in speech production. For example, the proximate unit of phonological encoding is syllable in Chinese but segments in Dutch, French or English. The present study investigated the effects of WF and SF, and their interaction in Chinese written and spoken production. Significant facilitatory WF and SF effects were observed in spoken as well as in written production. The SF effect in writing indicated that phonological properties (i.e., syllabic frequency) constrain orthographic output via a lexical route, at least, in Chinese written production. However, the SF effect over repetitions was divergent in both modalities: it was significant in the former two repetitions in spoken whereas it was significant in the second repetition only in written. Due to the fragility of the SF effect in writing, we suggest that the phonological influence in handwritten production is not mandatory and universal, and it is modulated by experimental manipulations. This provides evidence for the orthographic autonomy hypothesis, rather than the phonological mediation hypothesis. The absence of an interaction between WF and SF showed that the SF effect is independent of the WF effect in spoken and written output modalities. The implications of these results on written production models are discussed.

The transition into ambient language: A longitudinal study of babbling and first word production of Italian children

The present study investigates the appearance of certain phonetic, phonological, and prosodic aspects of Italian in the early language of native speakers; a longitudinal analysis of babbling and word production in 11 Italian children ranging in age from 0;10 to 2;0 is reported. It focuses in particular on the syllabic frequency of babbling utterances and the distribution of consonant sounds in relation to their place of articulation in babbling and first words. It analyzes also the role of phonotactic characteristics and accentual patterns of word targets in production correctness and word shape constraints. Results show that the relationships with the frequency characteristics of the Italian lexicon become increasingly evident in language production from age 0;11 on. The data also provide substantiation for the role of phonotactic characteristics and accentual patterns in influencing correct word production. Finally, a continuity between babbling and words emerged from an analysis of individual differences. The discussion focuses on the role of ambient characteristics of language versus universal articulatory constraints in early phonological development.

A neuroimaging study of conflict during word recognition

Using functional magnetic resonance imaging the neural activity associated with error commission and conflict monitoring in a lexical decision task was assessed. In a cohort of 20 native speakers of Spanish conflict was introduced by presenting words with high and low lexical frequency and pseudo-words with high and low syllabic frequency for the first syllable. Erroneous versus correct responses showed activation in the frontomedial and left inferior frontal cortex. A similar pattern was found for correctly classified words of low versus high lexical frequency and for correctly classified pseudo-words of high versus low syllabic frequency. Conflict-related activations for language materials largely overlapped with error-induced activations. The effect of syllabic frequency underscores the role of sublexical processing in visual word recognition and supports the view that the initial syllable mediates between the letter and word level.

The Functional Origin of the Foreign Accent

Individuals who speak more than one language often do so with a foreign accent in their second language. Previous investigations have focused on the acoustic phonetic properties of speech, showing how language-learning history shapes the occurrence of accent. By contrast, little is known about the phonological and phonetic representations that allow the production of each language within one speaker. We investigated this issue via the syllable-frequency effect, thought to index the retrieval of syllable-size representations during speech production. We tested French-Spanish early and late bilinguals in a task in which the materials’ syllabic frequency in both languages was manipulated. The frequency of syllables in the nonspoken language affected performance only with late bilinguals. This is interpreted as evidence that syllabic representations are shared across languages in late bilinguals but are separate in early bilinguals. One of the functional origins of foreign accent in late bilinguals may be the retrieval of syllabic representations shared across languages.

Is It True That the Differences in Reading Performance Between Students With and Without LD Cannot Be Explained by IQ?

This study was designed to demonstrate whether the differences in reading between students with learning disabilities (LD) and non-learning disabled students (NLD) can be explained by IQ. A sample of 133 Spanish children (85 male, 48 female) ranging in age from 8 to 13 years were classified into four groups according to IQ as measured by the Wechsler Intelligence Scale for Children-Revised (< 80; 81-90; 91-109: 110-140) and into two groups based on reading level (LD and NLD). A lexical decision task was used and we manipulated different word parameters (length, positional syllabic frequency, and familiarity) and pseudoword parameters (length and positional syllabic frequency) to study the routes used by both groups. Our findings indicate that IQ does not explain the differences between children with LD and NLD children in lexical processing. We found that the lexical and sublexical parameters have a greater influence on students with LD than NLD students, independent of IQ. In synthesis, the LD group has more difficulty in lexical processing, which is influenced by poor phonological skills.

Syllable Frequency and Visual Word Recognition in Spanish

This paper examines the role of the syllable as a sublexical representational unit during visual word recognition in a shallow language: Spanish. Five experiments were carried out to test the effect of the frequency of the syllables on naming latencies and lexical decision times. The orthographic redundancy hypothesis (Seidenberg, 1987, 1989) claims that the effects of syllabic structure are merely illusory and that they can be explained as effects deriving from the frequency of cooccurrence of letter patterns. The reliable effects of syllabic frequency that we found cannot be accounted by the frequency of cooccurrence of letter patterns. The implications of such findings for the dual route theory and for the PDP model proposed by Seidenberg and McClelland are discussed.

The syllable as a source of error in multisyllable word recognition

Two-syllable words were presented singly for followed by a two-alternative, forced-choice recognition test. Half of the new words on the test (I words) were constructed by combining two syllables taken from two different study words, and half were neutral words (C words). If, as a consequence of study, the memory for a word carries frequency information about each syllable of multisyllable words, the number of errors produced by choosing I words should be greater than the number produced by choosing C words. The results supported this expectation. Furthermore, differences which occurred during the test suggested that syllabic frequency was further increased during testing. Frequency induction to elements of larger units was proposed as the mechanism by which formal similarity influences recognition.

The application of high-voltage steel-tank mercury-arc rectifiers to broadcast transmitters

The paper describes the types of high-voltage steel-tank rectifier used in the higher-power radio stations constructed by the British Broadcasting Corporation, including a recent type of pumpless air-cooled equipment, and gives a review of their performance in service. Appendices contain some analytical and design data for the various types of rectifier connection used in practice, smoothing circuits, and grid-control features, with particular reference to stations in which rectifiers form the bulk of the load, and in which, owing to Class B modulation, the load on the rectifier fluctuates over wide limits at syllabic frequency.