Unit:
Διαπανεπιστημιακό ΠΜΣ Βασική και Εφαρμοσμένη Γνωσιακή ΕπιστήμηLibrary of the School of Science
Supervisors info:
Μουτούσης Κωνσταντίνος, Αναπλ. Καθηγητής (Επιβλέπων), Πρωτόπαπας Αθανάσιος, Καθηγητής, Βατάκη Αργυρώ, Ερευνήτρια
Original Title:
Μελέτη της χρονικής σχέσης των κινήσεων πρώτης έναντι δεύτερης τάξης
Translated title:
Study of the temporal relation of first and second order motion
Summary:
Motion is perceived because of the spatiotemporal differentiation of a series
of image characteristics such as luminance, color, local contrast, texture,
flicker. The perception of movement defined as "first order" is based on the
spatio-temporal changes of luminance of the points of the observed space.
"Second order" is defined as the motion resulting from the change of texture,
flicker, contrast or some other quality that does not lead to a change in
average luminance of the stimulus. In this context, a major debate in the field
of motion research deals with the question of whether or not two separate
low-level mechanisms for the encoding of first and second order motion exist.
Τhe aim of this study is to investigate the difference between the processing
times of the two kinds of motion, adopting the experimental paradigm of
perceptual pairing, first proposed by Moutousis and Zeki (1997). This paradigm
enables the comparison of perceptual times in relation with the physical timing
of the two kinds of motion. Ιn the experiments conducted no systematic delay
was recorded between the two motion types. The findings are examined in light
of alternative theories-interpretations. Further research is recommended for
the testing of these alternative post-hoc hypotheses.
Keywords:
Optical motion perception mechanisms, First order motion, Second order motion, Perceptual pairing, Non-Fourier motion
Number of index pages:
11-12