Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 46, Problem 2Q
Summary Introduction
To review:
The reasons, which helps to conclude that alertness is decreased after sleep deprivation, based on the reaction-time results.
Given:
The results of likelihood ratio test (LTR) and PLUS tests are given in the Table 1:
Table 1: The accuracy and reaction time of well-rested (RW) and sleep-deprived (SD) subjects.
| % Accuracy | RW | SD24 | SD35 | Reaction time (ms) | RW | SD24 | SD35 |
| LTR | 95.2 | 86.5* | 85.0* | LTR | 745 | 792* | 769 |
| PLUS | 95.0 | 86.6* | 84.3* | PLUS | 698 | 747* | 746* |
Where, sleep-deprived24 (SD24) refers to subjects who were sleep-deprived for 24 hours and SD35 for 35 hours. LTR and PLUS are the two types of tests which were conducted. A * indicates that there is a significant difference.
Introduction:
LTR and PLUS are two types of tests designed to analyze the brain function of SD subjects based on their reaction-time and accuracy. The PLUS test was slightly more complex and required more comprehension and alertness.
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Chapter 46 Solutions
Life: The Science of Biology
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