End spurt in vigilance.

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Abstract
An experiment was performed to test the hypothesis that an end-spurt effect would be demonstrated in a vigilance situation when Ss had knowledge of both length of the vigil and present point in the vigil. 2 groups of 20 Ss each were tested on a visual vigilance task for 135 min. 1 group had knowledge of the length and present point in the vigil and the 2nd group did not. Analysis of the data indicated a statistically significant improvement in performance for the 1st group and no change in performance for the 2nd group in the final period of testing. It was concluded that the experimental hypothesis, based upon an r-sub(g)-s-sub(g) interpretation of vigilance performance, was supported. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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