Pantani M.,Interuniversity Center |
Tagini A.,University of Milan Bicocca |
Raffone A.,Interuniversity Center |
Raffone A.,University of Rome La Sapienza
Phenomenology and the Cognitive Sciences | Year: 2016
The distinction between phenomenal and access consciousness is central to debates about consciousness and its neural correlates. However, this distinction has often been limited to the domain of perceptual (visual) experiences. On the basis of dream phenomenology and neuroscientific findings this paper suggests a theoretical framework which extends this distinction to dreaming, also in terms of plausible neural correlates. In this framework, phenomenal consciousness is involved in both waking perception and dreaming, whereas access consciousness is weakened, but not fully eliminated, during dreaming. However, access consciousness is more active during lucid dreaming. The proposed framework accounts for different aspects of dream phenomenology, including levels of integration of perceptual, cognitive and affective features in dreams, bizarreness, dream amnesia and the occurrence of meta-awareness and accessibility in lucid dreaming. Self-related experiences and their neural substrates are suggested to be differently involved in waking cognition and dreaming. Further, phenomenal consciousness during both waking and dream experiences involve widespread recurrent interactions and convergence-divergence zones in the thalamo-cortico-limbic system, activated before conscious access in global workspace areas. Finally, we discuss the relationships of the proposed framework with other neurocognitive theories and models of consciousness and major theories of dreaming, and propose novel experimental predictions. © 2016 Springer Science+Business Media Dordrecht
Simione L.,University of Rome La Sapienza |
Simione L.,CNR Institute of Neuroscience |
Calabrese L.,University of Rome La Sapienza |
Marucci F.S.,University of Rome La Sapienza |
And 5 more authors.
PLoS ONE | Year: 2014
A plethora of research demonstrates that the processing of emotional faces is prioritised over non-emotive stimuli when cognitive resources are limited (this is known as 'emotional superiority'). However, there is debate as to whether competition for processing resources results in emotional superiority per se, or more specifically, threat superiority. Therefore, to investigate prioritisation of emotional stimuli for storage in visual short-term memory (VSTM), we devised an original VSTM report procedure using schematic (angry, happy, neutral) faces in which processing competition was manipulated. In Experiment 1, display exposure time was manipulated to create competition between stimuli. Participants (n = 20) had to recall a probed stimulus from a set size of four under high (150 ms array exposure duration) and low (400 ms array exposure duration) perceptual processing competition. For the high competition condition (i.e. 150 ms exposure), results revealed an emotional superiority effect per se. In Experiment 2 (n = 20), we increased competition by manipulating set size (three versus five stimuli), whilst maintaining a constrained array exposure duration of 150 ms. Here, for the five-stimulus set size (i.e. maximal competition) only threat superiority emerged. These findings demonstrate attentional prioritisation for storage in VSTM for emotional faces. We argue that task demands modulated the availability of processing resources and consequently the relative magnitude of the emotional/threat superiority effect, with only threatening stimuli prioritised for storage in VSTM under more demanding processing conditions. Our results are discussed in light of models and theories of visual selection, and not only combine the two strands of research (i.e. visual selection and emotion), but highlight a critical factor in the processing of emotional stimuli is availability of processing resources, which is further constrained by task demands. © 2014 Simione et al.
Mota T.S.,Interuniversity Center |
Carneiro A.,Interuniversity Center
Earth Sciences History | Year: 2013
For quite a while, scientific biography was relegated to a subordinate status in the history of science. In the last two decades, however, it has seen a revival, which can be explained both by its popularity among general audiences as it conveys a closer image of scientists and scientific practice, and science historians' reappraisal of biography as a literary genre and as a source for their research. When writing scientific biographies or using them as a source, however, historians have to contend with complex questions, such as the extent to which a particular biography is representative of larger patterns, and they face a variety of problems associated with the use of sources such as oral testimonies and obituaries. In this paper, the scientific lives of Joaquim Filipe Nery da Encarnação Delgado (1835-1908) and Francisco Luís Pereira de Sousa (1870-1931), both engineers working at the Portuguese Geological Survey, and Carlos Teixeira (1910-1982), a leading geologist working in the academia, will be analysed. Through this comparison, the authors aim to characterize the development of Portuguese geology in different contexts in the period spanning from the mid-nineteenth to the twentieth century.