References of "Majerus, Steve"
     in
Bookmark and Share    
Peer Reviewed
See detailVerbal short-term memory deficits in children with specific language impairment: impact of linguistic complexity and attentional control
Leclercq, Anne-Lise ULg; Maillart, Christelle ULg; Genet, Océane ULg et al

Conference (2012, May 11)

Children with specific language impairment (SLI) constantly show poor performance in verbal short term memory (STM) tasks. However, the precise mechanism at the root of this problem is still unclear ... [more ▼]

Children with specific language impairment (SLI) constantly show poor performance in verbal short term memory (STM) tasks. However, the precise mechanism at the root of this problem is still unclear. Verbal STM tasks, such as nonword repetition, are complex tasks recruiting linguistic and non linguistic abilities. Recent studies emphasize the role played by attentional capacities in verbal STM performances (e.g., Majerus, Bastin, et al., 2007; Majerus, Heiligenstein, et al., 2009; Majerus, Poncelet, et al., 2006). Moreover, a number of studies have demonstrated an impact of linguistic knowledge on verbal STM (e.g., Majerus & van der Linden, 2003). In the light of these developments, two studies re-explored the nature of verbal STM deficits in children with SLI by assessing the impact of attentional capacity and linguistic complexity. The first study assessed the impact of attentional capacities on STM via a nonverbal dual-tasking paradigm in children with SLI, in children matched on age, and in children matched on STM span. The second study assessed the impact of lexical, perceptual and phonological variables on STM performance in children with SLI, in children matched on age, and in children matched on vocabulary knowledge. We will show that neither the attentional nor the linguistic complexity accounts can satisfactorily explain the verbal STM deficits observed in children with SLI. [less ▲]

Detailed reference viewed: 64 (10 ULg)
See detailMind-wandering and attentional control: two sides of the same coin or independent processes?
Stawarczyk, David ULg; Majerus, Steve ULg; D'Argembeau, Arnaud ULg

Conference (2012, May 11)

Mind-wandering refers to the occurrence of thoughts whose content is both unrelated to the task that we are currently carrying out and decoupled from current sensory perceptions (e.g., having our mind ... [more ▼]

Mind-wandering refers to the occurrence of thoughts whose content is both unrelated to the task that we are currently carrying out and decoupled from current sensory perceptions (e.g., having our mind distracted by past memories or future concerns when reading a novel). Recent frameworks suggest that the occurrence of mind-wandering reflects temporary breakdowns in attentional control processes. Other proposals however consider that mind-wandering is a cognitive process of its own, independent of attentional control. Based on the dual mechanisms of control framework (Braver et al., 2007), we examined whether proactive and reactive attentional control processes (measured with the A-X Continuous Performance Test), as well as working memory capacity (WMC), are related to the occurrence of mind-wandering during the Sustained Attention to Response Task (SART). Results showed that WMC was positively related to proactive but not reactive control, while the frequency of mind-wandering was unrelated to these three measures of attentional control. Additionally, we found that proactive control, reactive control, WMC, and mind-wandering contributed significantly and independently to the prediction of commission errors during the SART. These results suggest that mind-wandering is not the mere reflection of attentional control abilities and that these two factors have separate influences on task performance. [less ▲]

Detailed reference viewed: 92 (7 ULg)
Peer Reviewed
See detailSpatial attention in working memory
Anseeuw, B.; Van Dijck, P.; Majerus, Steve ULg et al

Conference (2012, May)

Detailed reference viewed: 11 (0 ULg)
Full Text
Peer Reviewed
See detailThe impact of aging and hearing status on verbal short-term memory
Verhaegen, Clémence ULg; Collette, Fabienne ULg; Majerus, Steve ULg

Conference (2012, May)

We determined the impact of hearing status on age-related effects on verbal short-term memory (STM). Rabbit (1991) observed that elderly participants with hearing loss show impaired STM; he suggested that ... [more ▼]

We determined the impact of hearing status on age-related effects on verbal short-term memory (STM). Rabbit (1991) observed that elderly participants with hearing loss show impaired STM; he suggested that in the case of hearing loss, attentional resources had to be recruited to a larger extent to stimulus perception, reducing the available pool of attentional resources for STM processing. We tested this hypothesis by distinguishing the impact of aging from the impact of hearing status on STM. This was done by administering different verbal STM tasks to elderly and young adult participants matched for hearing threshold, as well as normal-hearing control participants. We observed that elderly participants and hearing-matched young participants showed equal levels of performance in all verbal STM tasks, and performed overall more poorly than the normal-hearing young control participants. These results suggest that mild hearing impairment is a major explanatory factor of reduced STM performance, and importantly, is age-independent. The results are discussed within an interactive framework of STM and attentional processing (Majerus et al., 2009). [less ▲]

Detailed reference viewed: 62 (10 ULg)
Peer Reviewed
See detailTwo distinct origins of long-term learning effects in verbal short-term memory?
Majerus, Steve ULg; Oberauer, K.

Conference (2012, April)

Detailed reference viewed: 6 (0 ULg)
Peer Reviewed
See detailDo common principles underlie the representation of order in STM and numerical judgment tasks?
Attout, Lucie ULg; Majerus, Steve ULg

Conference (2012, March 29)

Although many studies have explored magnitude effects in numerical cognition, the representation of order information has received only limited interest. We explored the hypothesis that common abstract ... [more ▼]

Although many studies have explored magnitude effects in numerical cognition, the representation of order information has received only limited interest. We explored the hypothesis that common abstract ordinal representations underlie the representation of order information across different domains. We tested this hypothesis by determining the similarity of distance effects in short-term memory (STM) order probe recognition (did ‘8’ occur before ‘5’ in the list ‘3, 6, 5, 4, 8, 7’ presented a few seconds ago?) and in order judgment tasks (does ‘1’ occur before ‘2’), both numerical and alphabetical stimuli were used. In numerical cognition, adjacent numbers are typically judged more slowly than more distant numbers. In fifty healthy adults, we observed significant distance effects across all tasks: in the order judgment tasks, adjacent numbers/letters were judged more slowly than more distant numbers/letters; in the STM tasks, order recognition was slowed for stimuli stemming from adjacent positions in the STM list as compared to stimuli stemming from more distant positions. Regression slopes for distance effects were identical across the different tasks and conditions. Furthermore, the size of distance effects correlated significantly across tasks, except for the order judgment task with numerical stimuli. We will discuss the implications of these results for a hypothetical common representational system of order information in STM and numerical cognition. [less ▲]

Detailed reference viewed: 37 (3 ULg)
Peer Reviewed
See detailNeurophysiological indices of top-down attentional processing in minimally conscious patients : an ERP study.
Schnakers, C.; Lovstad, M.; Boly, M. et al

Conference (2012, March)

Detailed reference viewed: 6 (0 ULg)
Peer Reviewed
See detailThe problem of assessing consciousness in brain-damaged patients with aphasia
Schnakers, C.; Bessou, H.; Giacino, J.T. et al

Conference (2012, March)

Detailed reference viewed: 9 (0 ULg)
Full Text
Peer Reviewed
See detailDISSOCIATING SHORT-TERM MEMORY AND LANGUAGE IMPAIRMENT: THE IMPORTANCE OF ITEM AND SERIAL ORDER INFORMATION
Attout, Lucie ULg; VAN DER KAA, Marie-Anne ULg; GEORGE, Mercédès ULg et al

in Aphasiology (2012), 26(3-4), 355-382

BACKGROUND: Selective verbal short-term memory (STM) deficits are rare, and when they appear, they are often associated with a history of aphasia, raising doubts about the selectivity of these deficits ... [more ▼]

BACKGROUND: Selective verbal short-term memory (STM) deficits are rare, and when they appear, they are often associated with a history of aphasia, raising doubts about the selectivity of these deficits. Recent models of STM consider that STM for item information depends upon activation of the language system, and hence item STM deficits should be associated with language impairment. By contrast, STM for order information is considered to recruit a specific system, distinct from the language system: this system could be impaired in patients with language-independent STM deficits. AIM: We demonstrate here the power of the item-order distinction to separate STM and language impairments in two brain damaged cases with STM impairment and a history of aphasia. METHODS & PROCEDURES: Recognition and recall STM tasks, maximizing STM for either item or order information were administered to patients MB and CG. OUTCOMES & RESULTS: Patient MB showed mild phonological impairment. As predicted, associated STM deficits were characterized by poor item STM but preserved order STM. On the other hand, patient CG showed no residual language deficits. His STM deficit was characterized by poor order STM but perfectly preserved item STM. CONCLUSIONS: This study presents the first double dissociation between item and order STM deficits, and demonstrates the necessity of this distinction for understanding and assessing STM impairment in patients with and without aphasia. [less ▲]

Detailed reference viewed: 248 (27 ULg)
Peer Reviewed
See detailAn association between short-term memory for order and numerical cognition in 3rd grade kindergarten children.
Attout, Lucie ULg; Majerus, Steve ULg

Conference (2012, February)

Several studies explored the relationship between verbal short-term memory (STM) and numerical cognition, but with inconclusive findings. The present study re-explored this relationship, by adopting the ... [more ▼]

Several studies explored the relationship between verbal short-term memory (STM) and numerical cognition, but with inconclusive findings. The present study re-explored this relationship, by adopting the critical distinction between STM for item information (the items to be retained) and STM for order information (the order of the items within a list). We hypothesized that especially STM for order should be related to the development of numerical abilities, given that recent studies suggest the intervention of common processes during the representation of order information in STM and numerical tasks. We investigated item and order STM abilities and numerical processing abilities in 72 children during their third year in kindergarten. We observed that order STM abilities, but not item STM abilities, correlated significantly with performance on numerical order judgment and calculation tasks. These associations remained after control of interindividual differences in verbal and non-verbal cognitive efficiency. Our results suggest a specific relationship between order STM processes and numerical cognition, opening new perspectives for our understanding of the STM determinants of numerical cognition development. [less ▲]

Detailed reference viewed: 69 (11 ULg)
Full Text
See detailInterprétation et évaluation des déficits de la mémoire à court terme verbale dans les troubles spécifiques du développement du langage
Majerus, Steve ULg

in Maillart, Christelle; Schelstraete, Marie-Anne (Eds.) Les dysphasies (2012)

Detailed reference viewed: 6 (0 ULg)
Full Text
See detailBehavioral assessment and diagnosis of disorders of consciousness.
Schnakers, C; Majerus, Steve ULg

in Schnakers, C; LAUREYS, Steven (Eds.) Coma and disorders of consiousness (2012)

Detailed reference viewed: 6 (0 ULg)
Full Text
Peer Reviewed
See detailWhat about pain in disorders of consciousness?
Schnakers, Caroline; Chatelle, Camille ULg; Demertzi, Athina ULg et al

in AAPS Journal (2012), 14

Detailed reference viewed: 4 (0 ULg)