Moon illusion simulated in complete darkness: Planetarium experiment reexamined

Suzuki, Kotaro (1991) Moon illusion simulated in complete darkness: Planetarium experiment reexamined. Perception & Psychophysics, 49 (4). pp. 349-354.

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Abstract

In 1962, Kaufman and Rock reported that the moon illusion did not occur in the darkness of a planetarium or in a completely dark room. The present study reexamined their findings. Two pairs of light points, separated by 3.50 , were presented on the dome screen of a planetarium. Subjects compared the distance between the two light points presented in the horizontal direc- tion with the distance between the two light points at the zenith. Three illumination conditions were used: The inside ofthe planetarium was completely dark, was lighted, or was projected with the silhouette of a city under a starry sky. The effect of eye elevation on the illusion was also examined. Contrary to Kaufman and Rock's results, a size discrepancy comparable to the moon illusion was obtained in the horizon-and-stars condition and even in the complete-darkness con- dition. Little or no illusion was obtained in the lighted-room condition. The results also showed that eye elevation affected the magnitude of the illusion.

Item Type: Article
Subjects: Astronomy Education Research
Depositing User: Dr Michael Fitzgerald
Date Deposited: 25 Mar 2017 11:46
Last Modified: 19 Aug 2018 09:25
URI: http://istardb.org/id/eprint/75

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