Conceptual expansion via novel metaphor processing: An ERP replication and extension study examining individual differences in creativity

Impact of Daily Choral Singing and Creative Writing Activities on the Cognitive Development of Second-, Third-, and Fourth-Grade French Children from Low Socioeconomic Backgrounds

In France, around one-fifth of children have reading difficulties, and school results are highly dependent on their socio-economic status. In this context, the need for alternative and innovative teaching techniques holds importance, and more artistic approaches are promising. The aim of this study was to assess the impact of a daily choral singing or creative writing practice on the cognitive and linguistic development of French children from disadvantaged backgrounds. Eighty children participated in this longitudinal study, for whom we measured several cognitive and linguistic skills at the beginning (pre-test) and end (post-test) of the school year. The results showed that children in "singing" classes improved both their reading skills and processing speed, while those in "writing" classes improved their reading skills and vocabulary. These results open up new avenues of learning support, specifically for children with difficulties.

Cognitive control in creative discovery: The gap between ideal and reality

Creative discovery involves discovering the additional values of existing things in the environment by identifying the novel associations between seemingly unrelated things; the judgment made in this process is expected to be accurate but not entirely correct. From the perspective of cognitive processing, what is the difference between the ideal and real states of creative discovery? This is largely unknown. In this study, a daily life scenario was presented, and a great number of seemingly unrelated tools were presented for participants to discover valuable tools. Electrophysiological activity was recorded when participants identified tools, and we then retrospectively analyzed the differences between responses. Compared with usual tools, unusual tools evoked greater N2, N400 and late sustained potential (LSP) amplitudes, which was likely associated with the monitoring and resolution of cognitive conflicts. Moreover, unusual tools evoked smaller N400 and greater LSP amplitudes when correctly identified as usable than when identified as unusable; this result suggested that creative discovery in the ideal state should depend on the cognitive control involved in resolving conflicts. However, in the comparison between subjectively rated usable and unusable tools, smaller N400 and greater LSP amplitudes were observed only when unusual tools could be identified by expanding the application scope but not by releasing functional fixedness; this outcome suggested that creative discovery in the real state was not always influenced by the cognitive control involved in resolving conflicts. The difference in cognitive control that should be exerted and that was actually exerted to identify novel associations was discussed.

The effect of incongruous contextual cues on pictorial metaphor processing

An eye-tracking experiment was conducted to investigate the effects of incongruous contextual cues, both perceptual and conceptual, on pictorial metaphor processing. In a metaphoricity decision task, 38 participants independently viewed a total of 36 pictures equally divided into three different conditions: metaphoric pictures (MP), anomalous literal pictures (ALP) with perceptual congruity, and congruous literal pictures (LP). By initiating the midway condition ALP, the effect of contextual cues of conceptual incongruity were distinguished from that of perceptual incongruity. The eye movement data during each picture viewing were collected before the participant made a decision whether the picture was metaphorical or not. The behavioral results showed that the more abundant incongruous contextual cues were there, the more likely the pictures would be judged as metaphors. It took longer for the participants to make decisions on the literal pictures, be them in congruous or incongruous condition. The results of eye-tracking statistics showed that the perceptual incongruity cues were detected earlier than the conceptual ones. The perceptual-conceptual incongruity cues evoked more fixations and longer duration than the perceptual incongruity alone. The processing of conceptual incongruity proceeded after that of perceptual incongruity. The overall result of the study supports the contextual cues of perceptual incongruity as triggers for pictorial metaphor processing, whereas the contextual cues of conceptual incongruity play a decisive role in the metaphoric interpretation, which in turn renders the processing of MP more mental effort consuming than that of ALP or LP. The present findings have vital implications in revealing the triggering and determining mechanisms of pictorial metaphor processing, which are significant in exploring human cognition and have great impacts on various facets of social and cultural communications.

Decoding brain activities of literary metaphor comprehension: An event-related potential and EEG spectral analysis

Novel metaphors in literary texts (hereinafter referred to as literary metaphors) seem to be more creative and open-ended in meaning than metaphors in non-literary texts (non-literary metaphors). However, some disagreement still exists on how literary metaphors differ from non-literary metaphors. Therefore, this study explored the neural mechanisms of literary metaphors extracted from modern Chinese poetry by using the methods of Event-Related Potentials (ERPs) and Event-Related Spectral Perturbations (ERSPs), as compared with non-literary conventional metaphors and literal expressions outside literary texts. Forty-eight subjects were recruited to make the semantic relatedness judgment after reading the prime-target pairs in three linguistic conditions. According to the ERPs results, the earliest differences were presented during the time window of P200 component (170–260 ms) in the frontal and central areas, with the amplitude of P200 for literary metaphors more positive than the other two conditions, reflecting the early allocation of attention and the early conscious experience of the experimental stimuli. Meanwhile, significant differences were presented during the time window of N400 effect (430–530 ms), with the waveform of literary metaphors more negative than others in the frontal and central topography of scalp distributions, suggesting more efforts in retrieving conceptual knowledge for literary metaphors. The ERSPs analysis revealed that the frequency bands of delta and theta were both involved in the cognitive process of literary metaphor comprehension, with delta band distributed in the frontal and central scalp and theta band in parietal and occipital electrodes. Increases in the two power bands during different time windows provided extra evidences that the processing of literary metaphors required more attention and effort than non-literary metaphors and literal expressions in the semantic related tasks, suggesting that the cognitive process of literary metaphors was distinguished by different EEG spectral patterns.