Advantage of the go/no-go task over the yes/no lexical decision task: ERP indexes of parameters in the diffusion model.

Previous research findings supporting the advantages of the go/no-go choice over the yes/no choice in lexical decision task (LDT) have suggested that the go/no-go choice might require less cognitive resources in the non-decisional processes. This study aims to test such an idea using the event-related potential method. In this study, the tasks (yes/no LDT and go/no-go LDT) and word frequency (high and low) were manipulated, and the difference between the go/no-go choice and yes/no choice were examined with BP, pN, pN1, P200, N400, and P3 components that were assumed to be closely related with the various parameters in the diffusion model.

Early Effect of Phonological Information in Korean Visual Word Recognition: An ERP Investigation with Transposed Letters.

The purpose of this study was to examine the role of phonological information on visual word recognition by using letter transposition effects. The Korean writing system gives a unique opportunity to investigate such phenomenon since the transposition of the beginning consonant (onset) and the end consonant (coda) of a certain syllable allows one to keep the coda phonology constant while changing the written alphabetic characters. In this study, 23 participants' ERPs to such transposition cases were compared with the ERPs to cases that do not maintain coda phonology while the participants were performing a go/no-go lexical decision task for visually presented letter strings.

Early use of orthographic information in spoken word recognition: Event-related potential evidence from the Korean language.

This study examines whether orthographic information is used during prelexical processes in spoken word recognition by investigating ERPs during spoken word processing for Korean words. Differential effects due to orthographic syllable neighborhood size and sound-to-spelling consistency on P200 and N320 were evaluated by recording ERPs from 42 participants during a lexical decision task. The results indicate that P200 was smaller for words whose orthographic syllable neighbors are large in number rather than those that are small.

Syllable transposition effects in korean word recognition.

Research on the impact of letter transpositions in visual word recognition has yielded important clues about the nature of orthographic representations. This study investigated the impact of syllable transpositions on the recognition of Korean multisyllabic words. Results showed that rejection latencies in visual lexical decision for syllable-transposed Korean nonwords were delayed as compared with matched Korean nonwords without syllable transpositions.

The role of orthographic syllable frequency in the syllable frequency effect: evidence from Korean.

There have been ongoing debates as to whether the syllable frequency effect is dependent purely on phonological representation or is also affected by the orthographic representation of the syllable. In two experiments, the authors investigated the effect of the phonologic and orthographic frequencies on the syllable frequency effect by manipulating the first syllable's phonologic (high vs low) and orthographic (high vs low) frequency. Analyses of variance were performed for the lexical decision latencies and error rates in two experiments.

Thematic roles, markedness alignment and processing complexity.

Two experiments used eye-tracking during reading to investigate the role of the consistency of the relative markedness alignment of noun phrases (NPs) in the processing of complex sentences in Korean. To do so, the animacy of the first NP was varied in both experiments to manipulate the relative markedness of NPs. In addition, case markings of the second NP (nominative vs.

Understanding mechanisms in transitive inferences: an eye-tracking study in Korean reading.

The current experiment examined the mechanism of relational information processing by assessing transitive inferences in different syntactic structures. More specifically, the current experiment focused on whether the demands of conscious inference processing interact with the difficulty of syntactic processing. This research used the eye-tracking method to investigate online processing mechanisms in complex sentences with transitive inference.

ERP index of the morphological family size effect during word recognition.

The purpose of this study was to examine whether the N400 is affected by the semantic richness of associated neighboring word members or by the density of the orthographic syllable neighborhood. Another purpose of this study was to investigate the source of the different LPC in respect to the semantic richness. To do so, the density of the syllable neighborhood and the size of the morphological family of a word were orthogonally manipulated.

The different P200 effects of phonological and orthographic syllable frequency in visual word recognition in Korean.

The principal purpose of this study was to examine whether event-related potential (ERP) waveform amplitudes at around 200 ms are affected by first-syllable frequency. Another purpose of this study was to investigate whether the source of the amplitude at around 200 ms is phonological syllable frequency or orthographic syllable frequency. The phonological first-syllable frequency and the orthographic first-syllable frequency of Korean pseudo-words were manipulated, and ERPs were collected during a go/no-go lexical decision task.