It has been demonstrated that the processing of visuospatial information in reaching or navigational space is supported by independent systems. Moreover, it has been proposed that visuospatial information may require a pattern or a path encoding. The pattern encoding is specifically used when the task requires a simultaneous processing of spatial positions, while the path encoding is used in sequential processing that allows to link different spatial positions in correct succession. The aim of the present study was to disentangle these different components of visuospatial information processing in navigational tasks by the development of an innovative sensorized platform, and to verify if subjects use the same strategies when similar tasks are performed in reaching space. We assessed the performance of 70 healthy volunteers on the sensorized platform to investigate topographical orientation (route memory) in three different tasks that required a sequential strategy (named Route A and Route B tasks, which differ for sequential load required for their implementation) or a simultaneous strategy (named Simultaneous Walking Test). Subsequently, similar tasks were performed in reaching space, (by means Corsi Block tapping Test and a Modified Corsi Test for the sequential strategy and Simultaneous Paper Test for the simultaneous strategy). The six tasks were submitted to factor analysis (Principal Axis Factoring). This analysis showed four factors that explaining the 51.3% of the total variance: Corsi Block tapping Test (.501); Simultaneous Paper and Walking Test (-.74 and -.51, respectively); Route A (-.38); Modified Corsi Test and the Route B (.72 and .67, respectively). This clustering demonstrates that - the sensorized platform, set up in the present study, allows to identify the different strategies performed to correctly solve visuo-spatial tasks in navigational space – the same strategies can be also used in reaching space according to the task demand.
Pattern and path encoding: new tool for unwelding visuo-spatial memory through the use of a sensorized platform / Lupo Michela1, 2; Tedesco, ANNA MARIA; Aloise, Fabio; Ferlazzo, Fabio; Chiara, Cardillo; Leggio, Maria. - (2015). (Intervento presentato al convegno Ebps & Ebbs joint meeting tenutosi a Verona nel 12-15 settembre 2015).
Pattern and path encoding: new tool for unwelding visuo-spatial memory through the use of a sensorized platform
TEDESCO, ANNA MARIA;ALOISE, FABIO;FERLAZZO, Fabio;LEGGIO, Maria
2015
Abstract
It has been demonstrated that the processing of visuospatial information in reaching or navigational space is supported by independent systems. Moreover, it has been proposed that visuospatial information may require a pattern or a path encoding. The pattern encoding is specifically used when the task requires a simultaneous processing of spatial positions, while the path encoding is used in sequential processing that allows to link different spatial positions in correct succession. The aim of the present study was to disentangle these different components of visuospatial information processing in navigational tasks by the development of an innovative sensorized platform, and to verify if subjects use the same strategies when similar tasks are performed in reaching space. We assessed the performance of 70 healthy volunteers on the sensorized platform to investigate topographical orientation (route memory) in three different tasks that required a sequential strategy (named Route A and Route B tasks, which differ for sequential load required for their implementation) or a simultaneous strategy (named Simultaneous Walking Test). Subsequently, similar tasks were performed in reaching space, (by means Corsi Block tapping Test and a Modified Corsi Test for the sequential strategy and Simultaneous Paper Test for the simultaneous strategy). The six tasks were submitted to factor analysis (Principal Axis Factoring). This analysis showed four factors that explaining the 51.3% of the total variance: Corsi Block tapping Test (.501); Simultaneous Paper and Walking Test (-.74 and -.51, respectively); Route A (-.38); Modified Corsi Test and the Route B (.72 and .67, respectively). This clustering demonstrates that - the sensorized platform, set up in the present study, allows to identify the different strategies performed to correctly solve visuo-spatial tasks in navigational space – the same strategies can be also used in reaching space according to the task demand.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
