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Abstract: This article analyzes the instructed learning of the English article system by second language (L2) learners. The Competition Model (MacWhinney, 1987, 2012) was adopted as the theoretical framework for analyzing the cues to article usage and for designing effective computer‐based article instruction. Study 1 found that article cues followed a Zipfian distribution for availability or frequency and that the cues had overall high reliabilities. Study 2 assessed the initial level of cue reliance in a group of intermediate–advanced L2 learners. As expected, the input variables of cue availability and cue reliability clearly influenced both the accuracy of learners’ choices in a cloze test format and the subjects’ response times. Study 3 demonstrated that the form–function mappings relevant for native‐like article choice can be taught in two 1‐hour sessions using the strategy of cue focusing. The type of explicit instruction (analogical, i.e., by giving analogous examples without metalinguistic comments, vs. metalinguistic feedback) had an additional effect on response time, while both instruction types led to a similar increase in accuracy. These findings are novel and are highly relevant to both theory and pedagogy. [ABSTRACT FROM AUTHOR]

Abstract: Visual input enhancement (VIE) increases the salience of grammatical forms, potentially facilitating acquisition through attention mechanisms. Native English speakers were exposed to an artificial language containing four linguistic cues (verb agreement, case marking, animacy, word order), with morphological cues either unmarked, marked in the same color, or marked in different colors. Cue validity (how often a cue was present and correct) and dominance were also manipulated. In Experiment 1, where the morphological cues were low in validity but highly dominant, VIE helped participants to acquire and strengthen one morphological cue (case marking) but not the other (verb agreement). In Experiment 2, where animacy was highly dominant, there was no benefit of VIE; indeed, the same color VIE condition impeded the acquisition of the marked cues. Thus, VIE may only be beneficial in certain circumstances and this may depend on the type of cue as well as its validity and dominance. [ABSTRACT FROM AUTHOR]

There are ongoing debates on whether object concepts are coded as supramodal identity-based or modality-specific representations in the human brain. In this fMRI study, we adopted a cross-modal 'prime-neutral cue-target' semantic priming paradigm, in which the prime-target relationship was manipulated along both the identity and the modality dimensions. The prime and the target could refer to either the same or different semantic identities, and could be delivered via either the same or different sensory modalities. By calculating the main effects and interactions of this 2 (identity cue validity: 'Identity_Cued' vs. 'Identity_Uncued') × 2 (modality cue validity: 'Modality_Cued' vs. 'Modality_Uncued') factorial design, we aimed at dissociating three neural networks involved in creating novel identity-specific representations independent of sensory modality, in creating modality-specific representations independent of semantic identity, and in evaluating changes of an object along both the identity and the modality dimensions, respectively. Our results suggested that bilateral lateral occipital cortex was involved in creating a new supramodal semantic representation irrespective of the input modality, left dorsal premotor cortex, and left intraparietal sulcus were involved in creating a new modality-specific representation irrespective of its semantic identity, and bilateral superior temporal sulcus was involved in creating a representation when the identity and modality properties were both cued or both uncued. In addition, right inferior frontal gyrus showed enhanced neural activity only when both the identity and the modality of the target were new, indicating its functional role in novelty detection. Hum Brain Mapp 35:4002-4015, 2014. © 2014 Wiley Periodicals, Inc. [ABSTRACT FROM AUTHOR]

Converging evidence from neuroimaging as well as lesion and transcranial magnetic stimulation (TMS) studies has been obtained for the involvement of right ventral posterior parietal cortex (PPC) in exogenous orienting. However, the contribution of dorsal PPC to attentional orienting, particularly endogenous orienting, is still under debate. In an informative peripheral cueing paradigm, in which the exogenous and endogenous orienting can be studied in relative isolation within a single task, we applied TMS over sub-regions of dorsal PPC to explore their possible distinct involvement in exogenous and endogenous processes. We found that disruption of the left posterior intraparietal sulcus (pIPS) weakened the attentional effects of endogenous orienting, but did not affect exogenous processes. In addition, TMS applied over the right superior parietal lobule (SPL) resulted in an overall increase in reaction times. The present study provides the causal evidence that the left pIPS plays a crucial role in voluntary orienting of visual attention, while right SPL is involved in the processing of arousal and/or vigilance. Hum Brain Mapp 33:2477-2486, 2012. © 2011 Wiley Periodicals, Inc. [ABSTRACT FROM AUTHOR]