認知的統計的意思決定論ゼミの皆様

次回の研究会を下記のように計画しました。Scienceに掲載された興味深い
change blindnessの実験の発展のようです。いつものように気楽にお出かけくだ
さい。また、講演の後の会食も計画しています。



題目：Choice Blindness as a new tool to study self-knowledge in
decision making
講演者：Petter Johansson
所属：東京大学先端科学技術研究センター渡邊克巳研究室（認知科学分
野）
日時：平成19年10月20日(土）　午後3時から
場所：東京大学駒場キャンパス2号館3階308号室

要旨：It has recently been shown that people may miss mismatches
between the
intended and the actual outcome of their choices and actions, a
phenomenon called choice blindness (Johansson et al. 2005). In one of
our experiments, the participants were shown pairs of pictures of
female faces, and were instructed to choose which face in each pair
they found most attractive. In addition, on some trials, immediately
after their choice, they were asked to verbally describe the reasons
for choosing the way they did. Unknown to the participants, on certain
trials, a double-card ploy was used to covertly exchange one face for
the other. On these trials, the outcome of the choice became the
opposite of what they intended. Counting across all conditions of the
experiment no more than a fourth of all such manipulated trials were
detected. But not only were the participants blind to the manipulation
of their choices, the reasons they gave for their choices differed
very little between manipulated and non-manipulated trials.
The ability to compare the intention and outcome of our actions is
taken for granted in most models of decision making. In fields like
consumer research, introspectively derived explanations for choice
behavior is still assumed to be a reliable source of information
regarding how decisions are formed and made. I the presentation, I
will discuss how the phenomenon of choice blindness relates
assumptions like these, and how the methodology can be used as a new
tool to study self-knowledge in decision-making.



履歴：
1995　B.A. Philosophy and Psychology, University of Lund
1999　M.A. in Cognitive Science, University of Lund
2006   Ph.D. in Cognitive Science, University of Lund
2006-  Postdoctoral Fellow, Japan Society for the Promotion of Science


講演者紹介：
With a background in both Psychology and Philosophy of Mind,
my interests are naturally quite diverse. My current research
centres on self-knowledge, how introspection relates to higher
order as well as implicit processing. When we talk about ourselves,
when we reason and explain our choices and actions, how much
do we know and how much do we just think we know? To study
these questions, one of the methodologies we have developed is
called choice blindness. The basic idea is to manipulate the outcome
of people's choices without them noticing, and then measure how they
respond to the alterations made. The results show that not only do
people
seldom detect the change, they are also willing to give long and
elaborate
explanations for choices they in fact did not make. At the Watanabe lab
we are extending these basic finding by adding implicit measures, such
as eye movements and GSR, to examine how the choice blindness effect
relates to unconscious processes.


繁桝算男
生命環境科学系認知行動科学
tel　03-5454-6267　fax 03-5454-6979