title: The temporal dynamics underlying the comprehension of scientific metaphors and poetic metaphors.
abstract: The neural mechanisms underlying the processing of novel metaphors created from poetic contexts have been investigated in previous experiments. Considering the different attributes of metaphors, the current study compared the temporal dynamics for processing two kinds of novel metaphors with event-related potentials (ERPs): scientific metaphors and poetic metaphors. Amplitudes of the N400 (350-450ms) were similar for scientific metaphors and poetic metaphors. Within the LPC window (550-850ms), ERPs associated with these two kinds of novel metaphors were observed every 100ms in three successive subwindows. We found that due to a sustained late negativity overlapping in time and space with the LPC scientific metaphors seemingly elicited the least positive LPC throughout. More importantly, with the passage of time, the LPC waveforms for scientific metaphors diverged from those for poetic metaphors and conventional metaphors while LPC waveforms for poetic metaphors converged with those for conventional metaphors. The reported results indicate the possible different time courses for processing novel metaphors with different contextual structures and different functions. And the findings are compatible with recent brain imaging studies and complement them by adding such new dimensions as the temporal dynamics and the properties of novel metaphors.
authors.affiliation: Key Laboratory of Modern Teaching Technology, Ministry of Education, Shaanxi Normal University, Xi'an 710062, China; Foreign Languages College, Anhui Polytechnic University, Wuhu 241000, China. Electronic address: tangxuemei1122@hotmail.com.
authors.forename: Xuemei
authors.initials: X
authors.lastname: Tang
authors.affiliation: Key Laboratory of Modern Teaching Technology, Ministry of Education, Shaanxi Normal University, Xi'an 710062, China.
authors.forename: Senqing
authors.initials: S
authors.lastname: Qi
authors.affiliation: Key Laboratory of Modern Teaching Technology, Ministry of Education, Shaanxi Normal University, Xi'an 710062, China.
authors.forename: Botao
authors.initials: B
authors.lastname: Wang
authors.affiliation: Key Laboratory of Modern Teaching Technology, Ministry of Education, Shaanxi Normal University, Xi'an 710062, China.
authors.forename: Xiaojuan
authors.initials: X
authors.lastname: Jia
authors.affiliation: Key Laboratory of Modern Teaching Technology, Ministry of Education, Shaanxi Normal University, Xi'an 710062, China. Electronic address: renwei@snnu.edu.cn.
authors.forename: Wei
authors.initials: W
authors.lastname: Ren
mesh_terms: D000704:Analysis of Variance; D001921:Brain / Q000502:physiology*; D032882:Comprehension / Q000502:physiology*; D004569:Electroencephalography; D005071:Evoked Potentials; D005260:Female; D006801:Humans; D008297:Male; D019365:Metaphor; D009483:Neuropsychological Tests; D011037:Poetry as Topic; D011930:Reaction Time; D013997:Time Factors; D055815:Young Adult
keywords: Event-related potentials; LPC; Late negativity; N400; Poetic metaphors; Scientific metaphors