Many high cognitive applications, such as vision processing and representation and understanding of images, often need to analyse in detail how an ongoing visual search was performed in a representative subset of the image, which may be arranged into sequences of loci, called regions of interest (ROIs). We used the Trial Making Test (TMT) in which subjects are asked to fixate a sequence of letters and numbers in a logical alphanumeric order. The main characteristic of TMT is to force the subject to perform a default and well-known path. The comparison of the expected scan-path with the observed scan-path provides a valuable method to investigate how a task force the subject to maintain a top-down internal representation of execution and how bottom-up influences the performance. We developed a mechanism that analyses the scan path using different algorithms, and we compared it with other methods: we found that fixations outside the ROI are direct influence of exploration strategy. The paper discusses the method in healthy subjects.

Veneri, G., Rosini, F., Federighi, P., Federico, A., Rufa, A. (2012). Evaluating gaze control on a multi-target sequencing task: The distribution of fixations is evidence of exploration optimisation. COMPUTERS IN BIOLOGY AND MEDICINE, 42(2), 235-244 [10.1016/j.compbiomed.2011.11.013].

Evaluating gaze control on a multi-target sequencing task: The distribution of fixations is evidence of exploration optimisation.

Federighi P;FEDERICO, ANTONIO;RUFA, ALESSANDRA
2012-01-01

Abstract

Many high cognitive applications, such as vision processing and representation and understanding of images, often need to analyse in detail how an ongoing visual search was performed in a representative subset of the image, which may be arranged into sequences of loci, called regions of interest (ROIs). We used the Trial Making Test (TMT) in which subjects are asked to fixate a sequence of letters and numbers in a logical alphanumeric order. The main characteristic of TMT is to force the subject to perform a default and well-known path. The comparison of the expected scan-path with the observed scan-path provides a valuable method to investigate how a task force the subject to maintain a top-down internal representation of execution and how bottom-up influences the performance. We developed a mechanism that analyses the scan path using different algorithms, and we compared it with other methods: we found that fixations outside the ROI are direct influence of exploration strategy. The paper discusses the method in healthy subjects.
Veneri, G., Rosini, F., Federighi, P., Federico, A., Rufa, A. (2012). Evaluating gaze control on a multi-target sequencing task: The distribution of fixations is evidence of exploration optimisation. COMPUTERS IN BIOLOGY AND MEDICINE, 42(2), 235-244 [10.1016/j.compbiomed.2011.11.013].
File in questo prodotto:
File Dimensione Formato  
Veneri.pdf

non disponibili

Tipologia: Post-print
Licenza: Creative commons
Dimensione 575.25 kB
Formato Adobe PDF
575.25 kB Adobe PDF   Visualizza/Apri   Richiedi una copia
Evaluating gaze control on a multi-target sequencing task.pdf

non disponibili

Tipologia: PDF editoriale
Licenza: NON PUBBLICO - Accesso privato/ristretto
Dimensione 458.86 kB
Formato Adobe PDF
458.86 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/26158
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo