31 lattice grid figures with black squares arranged in various patterns were shown in random order to 50 male subjects for very short periods. The projection times were 3/60, 4/60 and 5/60sec respectively in three trials. For each figure, the subjects were asked to recall the location of the target black squares within the lattice figure. A “coefficient of correct responses” was created and used to calculate the degree of correct recognition for each figure.
Results:
(1) Where the target black squares were few, or were regularly arranged (as in a check pattern) the recognition level wes high. The recognition level was low for figures with target black squares in random positions. Recognition was also lower when the target black squares were unconnected than when two or more adjacent.
(2) In general, the upper and right portions of the figures were more correctly recalled than the lower and left portions.

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The purpose of this paper is to analyze the psychological feeling of room lighting systems as one of housing design elements. Several types of illuminating system are controlled in an experimental room according to the experimental design regarding direct or indirect illumination, tungstenic filament or fluorescent lamp, high or low level of illuminance, and with or without recessed light and floor stand. Thirty three designers participate to evaluate the atmosphere or lighting system with semantic differential 7-point scales of 21 adjective words. The results are calculated by multivariate analysis. The indirect lighting system, tungstenic filament lamp, and middle illuminance level enhance the psychological feeling.

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