Mariagrazia Ranzini

Mariagrazia Ranzini
University of Padova | UNIPD · Department of General Psychology

PhD in Psychology

About

34
Publications
3,877
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377
Citations
Citations since 2016
20 Research Items
238 Citations
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2016201720182019202020212022010203040
Introduction
I am an experimental psychologist with a strong interest in cognitive neurosciences. My main domain of expertise concerns numerical cognition. I study numerical cognition in relation to other aspects of human cognition, such as spatial attention, working memory, hand action, synaesthesia. I am currently researcher and Marie Curie Fellow at the Department of General Psychology of the University of Padua (project: GRINP).

Publications

Publications (34)
Preprint
Full-text available
Embodied theories of cognition consider many aspects of language and other cognitive domains as the result of sensory and motor processes. In this view, the appraisal and the use of concepts are based on mechanisms of simulation grounded on prior sensorimotor experiences. Even though these theories continue receiving attention and support, increasi...
Preprint
Exogenous orienting of attention can affect the mental processing of time, suggesting the existence of a spatial representation for temporal durations, with shorter and longer durations represented on the left and on the right of a mental time line, respectively. In this study, we investigated the effects of voluntary shifts of attention on the per...
Article
Full-text available
Embodied and grounded cognition theories state that cognitive processing is built upon sensorimotor systems. In the context of numerical cognition, support to this framework comes from the interactions between numerical processing and the hand actions of reaching and grasping documented in skilled adults. Accordingly, mechanisms for the processing...
Preprint
Full-text available
The functional specialization of the ventral stream in Perception and the dorsal stream in Action is the cornerstone of the leading model proposed by Goodale and Milner in 1982. This model is based on neuropsychological evidence and has been a matter of debate for almost three decades, during which the dual-visual stream hypothesis has received muc...
Article
Previous studies suggest that associations between numbers and space are mediated by shifts of visuospatial attention along the horizontal axis. In this study, we investigated the effect of vertical shifts of overt attention, induced by optokinetic stimulation (OKS) and monitored through eye-tracking, in two tasks requiring explicit (number compari...
Article
The reliance of number processing on sensorimotor mechanisms involved in hand action has been extensively documented by behavioural studies. Nonetheless, where and how the computations of number and hand action interact in the brain has received limited attention. In this study we investigated the brain networks underlying symbolic number compariso...
Preprint
Embodied and grounded cognition theories suggest that cognitive processes are built upon sensorimotor systems. In the context of studies on numerical cognition, interactions between number processing and the hand actions of reaching and grasping have been documented in skilled adults, thereby supporting embodied and grounded cognition accounts. The...
Preprint
Previous studies suggest that associations between numbers and space are mediated by shifts of visuospatial attention along the horizontal axis. In this study, we investigated the effect of vertical shifts of overt attention, induced by optokinetic stimulation (OKS) and monitored through eye-tracking, in two tasks requiring explicit (number compari...
Article
Full-text available
This magnetoencephalography study aimed at characterizing age-related changes in resting-state functional brain organization from mid-childhood to late adulthood. We investigated neuromagnetic brain activity at rest in 105 participants divided into three age groups: children (6–9 years), young adults (18–34 years) and healthy elders (53–78 years)....
Preprint
Full-text available
This magnetoencephalography study aimed at characterizing age-related changes in resting-state functional brain organization from mid-childhood to late adulthood. We investigated neuromagnetic brain activity at rest in 105 participants divided into three age groups: children (6-9 years), young adults (18-34 years) and healthy elders (53-78 years)....
Article
This study investigates the bi-directionality of synaestesic experience by means of a flanked bisection paradigm in TT, a number-colour synaesthete. Previous studies have shown that bisection is shifted towards the larger digit flanker (e.g., Ranzini & Girelli, 2012). TT and controls performed line bisections with lines flanked by black digits (exp...
Article
Working memory refers to our ability to actively maintain and process a limited amount of information during a brief period of time. Often, not only the information itself but also its serial order is crucial for good task performance. It was recently proposed that serial order is grounded in spatial cognition. Here, we compared performance of a gr...
Article
Number interval bisection consists of estimating the mid-number within a pair (1–9=>5). Healthy adults and right-brain damage patients can show biased performance in this task, underestimating and overestimating the mid-number, respectively. The role of visuospatial attention during this task, and its interplay with other cognitive abilities (e.g.,...
Article
A largely substantiated view in the domain of working memory is that the maintenance of serial order is achieved by generating associations of each item with an independent representation of its position, so called position markers. Recent studies reported that the ordinal position of an item in verbal working memory interacts with spatial processi...
Article
Full-text available
Growing evidence suggests that orienting visual attention in space can influence the processing of numerical magnitude, with leftward orienting speeding up the processing of small numbers relative to larger ones and the converse for rightward orienting. The manipulation of eye movements is a convenient way to direct visuospatial attention, but seve...
Article
Full-text available
Previous studies have shown that number processing can induce spatial biases in perception and action and can trigger the orienting of visuospatial attention. Few studies, however, have investigated how spatial processing and visuospatial attention influences number processing. In the present study, we used the optokinetic stimulation (OKS) techniq...
Conference Paper
Full-text available
The existence of sound-to-shape correspondences has been demonstrated in the literature on sound-symbolism using double forced-choice paradigms and ad hoc figures. In two experiments, we tested if the sound-shape correspondence effect would be observed when participants were required to name one by one figures of every-day entities. Additionally, a...
Article
Full-text available
Prior research on sound-symbolism has demonstrated the existence of sound-shape correspondences using ad hoc figures in double forced-choice paradigms. This led sound-symbolic skeptics to affirm that the reported effects were due to the properties of the figures shown or to the structure of the task used. In the present study, we hypothesized that...
Article
A variety of studies showed that participants are facilitated when responding to graspable objects, while it has not been fully investigated what happens during interactions with graspable objects that are potentially dangerous. The present study focuses on the mechanisms underlying the processing of dangerous objects. In two experiments, we adopte...
Conference Paper
Previous studies observed an association between numbers and space, in which small and large numbers are associated with left and right responses, respectively (SNARC effect, Dehaene et al., 1993). In a recent study, Ren and colleagues (2011) found that this association extended to non-numerical magnitude related concepts. We chose this design as...
Conference Paper
Full-text available
Previous studies have shown that number processing involves mechanisms related to visuo-spatial attention orienting. The majority of these studies has revealed the effects of number processing on visuo-spatial attention orienting and on spatially-encoded responses (e.g., left-sided, right-sided). Fewer studies, however, have investi- gated how the...
Article
Full-text available
The link between numerical magnitude and mechanisms of spatial orienting has been underlined in an increasing number of studies. Similarly, the relationship between numerical magnitude and grasping actions has started to be investigated. The present study focuses on the influence of numerical magnitude processing in the free choice of the position...
Article
Full-text available
Recent studies have suggested that numerical and physical magnitudes are similarly processed by a generalized magnitude system. The present study investigates the number-luminance interaction, taking advantage of illusory effects in a cued line bisection task with numerical or nonnumerical flankers and varying levels of luminance. The results showe...
Article
Full-text available
The field of numerical cognition represents an interesting case for action-based theories of cognition, since number is a special kind of abstract concept. Several studies have shown that within the parietal lobes adjacent neural regions code numerical magnitude and grasping-related information. This anatomical proximity between brain areas involve...
Article
A variety of studies have shown action- and object-related visuo-motor priming in behavioural tasks. The peculiarity of this study lies in using a hand-cued line bisection task to explore the main properties of the motor effects evoked by action and object processing. In five experiments it is shown that flanking a line (thin vs. thick line) with i...
Article
Numerous behavioural paradigms have demonstrated a close connection between numbers and space, suggesting that numbers may be represented on an internal mental number line. For example, in the Spatial Numerical Association of Response Codes (SNARC) effect, reaction times are faster for left-sided responses to smaller numbers and for right-sided res...
Article
Studies of endogenous (cue-directed) attention have traditionally assumed that such shifts must be volitional. However, recent behavioural experiments have shown that participants make automatic endogenous shifts of attention when presented with symbolic cues that are systematically associated with particular spatial directions, such as arrows and...

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Projects

Projects (4)
Project
Grasping and Reaching In Number Processing (GRINP) is focused on the study of the neural underpinnings of number processing and its impairment. GRINP builds upon action-based theories of cognition - considering many aspects of human cognition as built on motor action - and on the idea that the neural bases for abstract concepts representation are networks of functionally-related recycled mechanisms. Through a comprehensive approach which couples neuropsychological with neuroimaging methods, GRINP tests to which extent number magnitude recruits the same sensorimotor network involved in planning and executing hand movements.
Archived project
in this line of research we investigated the mental representation of numerical magnitude.