Life: The Science of Biology
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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