Attempts are made to apply preference theory for sound fields to visual fields. To investigate how the periodical flicker and movements in vertical and horizontal directions are preferred, preference judgments were conducted by paired-comparison tests. Results show that each stimulus has each pereference period. The scale value of preference is formulated approximately in terms of the
power of the normalized period of stimulus. It is interesting that this formulation corresponds to that of temporal factors in sound fields. Next, relationships between the subjective preference and the factors extracted from the autocorrelation function (ACF) and the cross-correlation (CCF) of the EEG and MEG alpha waves were investigated. Remarkably, preferred stimulus shows a significantly longer effective duration of the ACF, τe
, of the alpha waves than that of less preferred stimulus. This tendency was also found in previous studies that varied the delay time of a single sound reflection and the reverberation time of a music sound field. Also, the preferred stimulus shows a significantly greater magnitude of the CCF between the alpha waves from different locations on the brain. Thus, a similar rhythm repeats over a wider range of the brain, in both space and time, under a preferred condition.
Copies of this thesis written in English can be obtained from Junko Atagi, 6813 Mosonou, Saijo-cho, Higashi-Hiroshima 739-0024, Japan. E-mail address: atagi\@urban.ne.jp.