Detection of guilty knowledge in real-life criminal investigations
Article Abstract:
The present study provides a first attempt to estimate the validity of the Guilty Knowledge Test (GKT) in real-life criminal investigations. Skin resistance responses in GKT records of 50 innocent and 48 guilty Ss, for whom actual truth was established by confession, were analyzed by two methods. On the basis of an a priori decision rule, 98% of the innocent and 42% of the guilty Ss were correctly classified. Signal detection measures based on various possible decision rules indicated that the distribution of guilty Ss was highly differentiated from the distribution of innocent Ss. An optimal decision rule yielded correct classifications for 94% of the innocent Ss and 65% of the guilty Ss. These results suggest that the GKT could be a useful investigative tool that protects innocent suspects from being falsely classified as guilty. The false-negative identifications were accounted for in terms of the realistic conditions. (Reprinted by permission of the publisher.)
Publication Name: Journal of Applied Psychology
Subject: Social sciences
ISSN: 0021-9010
Year: 1990
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A long-distance record breaker
Article Abstract:
The unique ability of the Space Telescope Imaging Spectrograph to discover faint objects has been exploited in research that has discovered an object with probably the largest redshift ever measured, z = 6.68. A redshift of 6.68 corresponds to a time when the Universe was only 5% of its current age. The apparent ultraviolet luminosity of this galaxy is quite strong, while the absorption from intergalactic hydrogen in the ultraviolet seems to be almost 100% at this redshift of 6.68.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
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A centennial for the Brahmin Bastille
Article Abstract:
The Park Plaza Castle, built as part of the Boston Armory in 1891, recently celebrated its 100th anniversary. The castle was originally built by the Boston Brahmins, the city's rich and privileged class, to protect them in case of riots by the city's growing immigrant population.
Publication Name: Yankee
Subject: General interest
ISSN: 0044-0191
Year: 1991
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