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Wyszukujesz frazę "Cleeremans, Axel" wg kryterium: Autor


Tytuł:
Manipulating attentional load in sequence learning through random number generation
Autorzy:
Wierzchoń, Michał
Cleeremans, Axel
Gaillard, Vinciane
Asanowicz, Dariusz
Opis:
Implicit learning is often assumed to be an effortless process. However, some artificial grammar learning and sequence learning studies using dual tasks seem to suggest that attention is essential for implicit learning to occur. This discrepancy probably results from the specific type of secondary task that is used. Different secondary tasks may engage attentional resources differently and therefore may bias performance on the primary task in different ways. Here, we used a random number generation (RNG) task, which may allow for a closer monitoring of a participant's engagement in a secondary task than the popular secondary task in sequence learning studies: tone counting (TC). In the first two experiments, we investigated the interference associated with performing RNG concurrently with a serial reaction time (SRT) task. In a third experiment, we compared the effects of RNG and TC. In all three experiments, we directly evaluated participants' knowledge of the sequence with a subsequent sequence generation task. Sequence learning was consistently observed in all experiments, but was impaired under dual-task conditions. Most importantly, our data suggest that RNG is more demanding and impairs learning to a greater extent than TC. Nevertheless, we failed to observe effects of the secondary task in subsequent sequence generation. Our studies indicate that RNG is a promising task to explore the involvement of attention in the SRT task
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Subjective measures of consciousness in artificial grammar learning task
Autorzy:
Wierzchoń, Michał
Paulewicz, Borysław
Cleeremans, Axel
Asanowicz, Dariusz
Opis:
Consciousness can be measured in various ways, but different measures often yield different conclusions about the extent to which awareness relates to performance. Here, we compare five different subjective measures of awareness in the context of an artificial grammar learning task. Participants (N = 217) expressed their subjective awareness of rules using one of five different scales: confidence ratings (CRs), post-decision wagering (PDW), feeling of warmth (FOW), rule awareness (RAS), and continuous scale (SDS). All scales were equally sensitive to conscious knowledge. PDW, however, was affected by risk aversion, and both RAS and SDS applied different minimal criteria for rule awareness. CR seems to capture the largest range of consciousness, but failed to indicate unconscious knowledge with the guessing criterion. We close by discussing the theoretical implications of scale sensitivity and propose that CR’s unique features enable (in conjunction with RAS and FOW) a finer assessment of subjective states of awareness.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Does level of processing affect the transition from unconscious to conscious perception?
Autorzy:
Asanowicz, Dariusz
Windey, Bert
Paulewicz, Borysław
Wierzchoń, Michał
Cleeremans, Axel
Anzulewicz, Anna
Opis:
Abstract Recently, Windey, Gevers, and Cleeremans (2013) proposed a level of processing (LoP) hypothesis claiming that the transition from unconscious to conscious perception is influenced by the level of processing imposed by task requirements. Here, we carried out two experiments to test the LoP hypothesis. In both, participants were asked to classify briefly presented pairs of letters as same or different, based either on the letters physical features (a low-level task), or on a semantic rule (a high-level task). Stimulus awareness was measured by means of the four-point Perceptual Awareness Scale (PAS). The results showed that low or moderate stimulus visibility was reported more frequently in the low-level task than in the high-level task, suggesting that the transition from unconscious to conscious perception is more gradual in the former than in the latter. Therefore, although alternative interpretations remain possible, the results of the present study fully support the LoP hypothesis.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
The response relevance of visual stimuli modulates the P3 component and the underlying sensorimotor network
Autorzy:
Koculak, Marcin
Asanowicz, Dariusz
Binder, Marek
Finc, Karolina
Gociewicz, Krzysztof
Bonna, Kamil
Cleeremans, Axel
Opis:
The functional meaning and neural basis of the P3b component of ERPs are still under debate. One of the main issues is whether P3b reflects only stimulus-related processes (stimulus evaluation hypothesis) or response-related processes as well (stimulus-response or S-R link activation hypothesis). Here, we conducted an EEG experiment examining whether P3b may indeed reflect an S-R link activation, followed by an fMRI experiment in which we explored the brain areas and functional connectivity possibly constituting the neural basis of these sensorimotor links. In both experiments, two successive visual stimuli, S1 and S2, were presented with a 1 sec interval, and responses were defined either by S1 or S2, while participants responded only after S2 onset. The obtained EEG results suggest that P3b may be interpreted in terms of the S-R link activation account, although further studies are needed to disentangle P3-related activity from overlapping anticipatory activity. The obtained fMRI results showed that processing of the relevant S1 involved activation of a distributed postero-anterior sensorimotor network, and increased strength of functional connectivity within this network. This network may underlie activation of the S-R links, thus possibly also the P3b component, forming a bridging step between sensory encoding and response execution.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
The levels of perceptual processing and the neural correlates of increasing subjective visibility
Autorzy:
Koculak, Marcin
Windey, Bert
Nikadon, Jan
Binder, Marek
Finc, Karolina
Derda, Monika
Gociewicz, Krzysztof
Cleeremans, Axel
Opis:
According to the levels-of-processing hypothesis, transitions from unconscious to conscious perception may depend on stimulus processing level, with more gradual changes for low-level stimuli and more dichotomous changes for high-level stimuli. In an event-related fMRI study we explored this hypothesis using a visual backward masking procedure. Task requirements manipulated level of processing. Participants reported the magnitude of the target digit in the high-level task, its color in the low-level task, and rated subjective visibility of stimuli using the Perceptual Awareness Scale. Intermediate stimulus visibility was reported more frequently in the low-level task, confirming prior behavioral results. Visible targets recruited insulo-fronto-parietal regions in both tasks. Task effects were observed in visual areas, with higher activity in the low-level task across all visibility levels. Thus, the influence of level of processing on conscious perception may be mediated by attentional modulation of activity in regions representing features of consciously experienced stimuli.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
What makes a theory of consciousness unscientific?
Autorzy:
Seitz, Aaron R.
Rademaker, Rosanne L.
Bengio, Yoshua
Kwok, Sze Chai
Garfinkel, Sarah
Wierzchoń, Michał
Solovey, Guillermo
Charest, Ian
Stein, Timo
Pereplyotchik, David
Schmitz, Michael
Heyes, Cecilia
Frith, Chris D.
Schiller, Daniela
Bisley, James W.
Spiers, Hugo
Kording, Konrad
Carruthers, Peter
Cherkaoui, Mouslim
Odegaard, Brian
Owen, Adrian M.
Carmel, David
Doerig, Adrien
Hassin, Ran R.
Mok, Robert M.
Hsieh, Po-Jang
Ringach, Dario L.
Martinez-Trujillo, Julio
Silvanto, Juha
Bekinschtein, Tristan A.
Or, Charles C.-F.
Shepherd, Joshua
Cheng, Tony
Sebastián, Miguel Ángel
Mobbs, Dean
Carrasco, Marisa
Dennett, Daniel C.
Taschereau-Dumouchel, Vincent
Herzog, Michael H.
Metcalfe, Janet
Tse, Peter U.
Pestilli, Franco
Browning, Jacob
Knapen, Tomas
Frankish, Keith
Slagter, Heleen A.
De Brigard, Felipe
Fleming, Stephen M.
Cumming, Sam
Lieberman, Matthew D.
Schwarzkopf, D. Samuel
Kvamme, Timo L.
Hanson, Jake R.
LeDoux, Joseph
Dijkstra, Nadine
Tong, Frank
Baxter, Mark G.
Buonomano, Dean
Smith, Barry C.
Phillips, Ian
Arnold, Derek H.
Mylopoulos, Myrto
Vibell, Jonas
Cushing, Cody A.
Goodale, Melvyn A.
Miller, Kenneth D.
de Gelder, Beatrice
Kentridge, Robert
Soto, David
Cohen, Michael A.
Carter, Olivia
Corlett, Philip R.
Liu, Ka-Yuet
Watzl, Sebastian
Schurger, Aaron
Weisberg, Josh
Rees, Geraint
Morales, Jorge
Libedinsky, Camilo
Christoff, Kalina
Gottlieb, Jacqueline
Lee, Alan L. F.
Lanfranco, Renzo C.
Webb, Taylor
Konstantinou, Nikos
Machizawa, Maro G.
Klincewicz, Michał
Snyder, Joel S.
Hung, Shao-Min
Scott, Ryan B.
Yan, Karen
Chang, Dorita H. F.
Rahnev, Dobromir
Dux, Paul E.
Roskies, Adina
Wheatley, Thalia
Mitra, Partha P.
Peters, Megan A. K.
Cleeremans, Axel
Lau, Hakwan
Michel, Matthias
Lin, Ying-Tung
Wokke, Martijn E.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł

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