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Hearing Disorders: HELP
Articles by Carlo Geraci
Based on 4 articles published since 2010
(Why 4 articles?)

Between 2010 and 2020, Carlo Geraci wrote the following 4 articles about Hearing Disorders.
+ Citations + Abstracts
1 Article Spatial biases in deaf, blind, and deafblind individuals as revealed by a haptic line bisection task. 2018

Cattaneo, Zaira / Rinaldi, Luca / Geraci, Carlo / Cecchetto, Carlo / Papagno, Costanza. ·1 Department of Psychology, University of Milano-Bicocca, Milano, Italy. · 2 Brain Connectivity Center, IRCCS Mondino, Pavia, Italy. · 3 NeuroMI, University of Milano-Bicocca, Milano, Italy. · 4 Institut Jean Nicod, Département d'études cognitives, ENS, EHESS, CNRS, PSL Research University, Paris, France. · 5 Structures Formelles du Langage, Université Paris 8/CNRS, Paris, France. · 6 CIMeC and CeRiN, University of Trento, Rovereto, Italy. ·Q J Exp Psychol (Hove) · Pubmed #30362405.

ABSTRACT: In this study, we investigated whether auditory deprivation leads to a more balanced bilateral control of spatial attention in the haptic space. We tested four groups of participants: early deaf, early blind, deafblind, and control (normally hearing and sighted) participants. Using a haptic line bisection task, we found that while normally hearing individuals (even when blind) showed a significant tendency to bisect to the left of the veridical midpoint (i.e., pseudoneglect), deaf individuals did not show any significant directional bias. This was the case of both deaf signers and non-signers, in line with prior findings obtained using a visual line bisection task. Interestingly, deafblind individuals also erred significantly to the left, resembling the pattern of early blind and control participants. Overall, these data critically suggest that deafness induces changes in the hemispheric asymmetry subtending the orientation of spatial attention also in the haptic modality. Moreover, our findings indicate that what counterbalances the right-hemisphere dominance in the control of spatial attention is not the lack of auditory input per se, nor sign language use, but rather the heavier reliance on visual experience induced by early auditory deprivation.

2 Article Finding the spatial-numerical association of response codes (SNARC) in signed numbers: notational effects in accessing number representation. 2012

Chinello, Alessandro / de Hevia, Maria Dolores / Geraci, Carlo / Girelli, Luisa. ·Center for Mind and Brain Sciences, University of Trento, Italy. ·Funct Neurol · Pubmed #23402679.

ABSTRACT: The present study investigates basic numerical processing in deaf signers and hearing individuals by evaluating notational effects (Arabic digits vs Italian sign language number signs) and response modality (manual vs pedal) in a parity judgment task. Overall, a standard SNARC effect emerged in both groups, suggesting similar numerical representation in hearing and deaf individuals. With the exception of Italian sign language stimuli in the hearing group, this effect applied to all stimuli notations and to both response modalities. In line with the special status of signs, the visuospatial complexity of finger configurations (i.e. number of extended fingers) affected the performance of the hearing group to a greater extent. Finally, the SNARC effect emerged systematically across lateralized effectors(manual/pedal response), challenging the hypothesis that the stimulus-response compatibility effect is specific to the effectors associated with the production of written and sign language. As for parity processing, both groups were similarly influenced by the parity information conveyed by the dominant hand, indicating the compositional nature of number signs irrespective of the preferred language modality.

3 Article Hearing shapes our perception of time: temporal discrimination of tactile stimuli in deaf people. 2012

Bolognini, Nadia / Cecchetto, Carlo / Geraci, Carlo / Maravita, Angelo / Pascual-Leone, Alvaro / Papagno, Costanza. ·Department of Psychology, University of Milano-Bicocca, Piazza dellʼAteneoNuovo 1, Milan, Italy. costanza.papagno@unimib.it ·J Cogn Neurosci · Pubmed #21916563.

ABSTRACT: Confronted with the loss of one type of sensory input, we compensate using information conveyed by other senses. However, losing one type of sensory information at specific developmental times may lead to deficits across all sensory modalities. We addressed the effect of auditory deprivation on the development of tactile abilities, taking into account changes occurring at the behavioral and cortical level. Congenitally deaf and hearing individuals performed two tactile tasks, the first requiring the discrimination of the temporal duration of touches and the second requiring the discrimination of their spatial length. Compared with hearing individuals, deaf individuals were impaired only in tactile temporal processing. To explore the neural substrate of this difference, we ran a TMS experiment. In deaf individuals, the auditory association cortex was involved in temporal and spatial tactile processing, with the same chronometry as the primary somatosensory cortex. In hearing participants, the involvement of auditory association cortex occurred at a later stage and selectively for temporal discrimination. The different chronometry in the recruitment of the auditory cortex in deaf individuals correlated with the tactile temporal impairment. Thus, early hearing experience seems to be crucial to develop an efficient temporal processing across modalities, suggesting that plasticity does not necessarily result in behavioral compensation.

4 Article Looking for an explanation for the low sign span. Is order involved? 2011

Gozzi, Marta / Geraci, Carlo / Cecchetto, Carlo / Perugini, Marco / Papagno, Costanza. ·Dipartimento di Psicologia, Università di Milano-Bicocca, Piazza dell'Ateneo Nuovo 1, Milan, Italy. ·J Deaf Stud Deaf Educ · Pubmed #20679138.

ABSTRACT: Although signed and speech-based languages have a similar internal organization of verbal short-term memory, sign span is lower than word span. We investigated whether this is due to the fact that signs are not suited for serial recall, as proposed by Bavelier, Newport, Hall, Supalla, and Boutla (2008. Ordered short-term memory differs in signers and speakers: Implications for models of short-term memory. Cognition, 107, 433-459). We administered a serial recall task with stimuli in Italian Sign Language to 12 deaf people, and we compared their performance with that of twelve age-, gender-, and education-matched hearing participants who performed the task in Italian. The results do not offer evidence for the hypothesis that serial order per se is a detrimental factor for deaf participants. An alternative explanation for the lower sign span based on signs being phonologically heavier than words is considered.