How Flexible is the Use of Egocentric Versus Allocentric Frame of Reference in the Williams Syndrome Population?

Abstract

Results demonstrate that despite difficulties in the spontaneous use of allocentric and egocentric frames of reference, some Williams Syndrome participants show flexibility in the use of an allocentric frame of reference when an explicit instruction is provided.

Topological and hodological aspects of body representation in right brain damaged patients

“…1E), that could be presented at different degrees of rotation (0, 45, 90, 270, 315 • ). Mental rotation generally involves a number of cognitive processes such as the generation of a mental image, object orientation discrimination, dynamic spatial transformation of this image, mental comparison, attentional processes, working memory and decision-making (Heiz et al, 2018;Kosslyn et al, 1995). Thus, an object laterality task, which tapped on the mental rotation of 20 non-body related stimuli (10 left and 10 right stimuli), was designed as a control task.…”

Visuospatial bias in line bisection in Williams syndrome

“…spatial construction and orientation) (Farran & Jarrold, ; Landau, Hoffman, & Kurz, ) and academic achievement (Becerra, John, Peregrine, & Mervis, ; Varuzza, De Rose, Vicari, & Menghini, ). According to several authors, the visual–spatial deficit could be related to WS individual's difficulties to use one body for development of egocentric reference system (Bernardino, Mouga, Castelo‐Branco, & van Asselen, ; Broadbent, Farran, & Tolmie, ; Heiz, Majerus, & Barisnikov, ). An early detection of the deviation of body representation should help in the development of targeted interventions for WS individuals to improve their visual–spatial skills and learning.…”