Date: Wed, June 20, 16:00-18:00
Place: Room M203, Komaba Open Laboratory, The University of Tokyo
Invited Speaker: Mr. Sergey S. Tarasenko (Kyoto University)

Title: A Hypothesis of Chaotic Dynamics underlying Decision-Making without 
       Prior Information

Abstract:
In our previous studies, the non-random performance of decision-making
without prior information (Blind Choice) has been indicated. This
performance is well described by the Golden Ratio and its numerical
properties through out experimental conditions. Therefore we have
suggested existence of some common mechanism for the Blind Choice.  In
this paper, we discuss a new numerical method to study this mechanism.
The basic idea behind this method is assumption of dynamical system
employed for decision-making. The main result obtained using the method
is extraction of a specific space describing the system's
structures. Here we focus on the organization of this space's structure
which is performed in accordance with interaction of repelling and
attracting fixed point deployed across the space.  These results suggest
that mental information processing underlying the Blind Choice is based
on a chaotic system.  This system and the Golden Ratio are hypothesized
to be contained in Implicit Primordial Knowledge.