TABLE OF CONTENTS Note: This is prosecution oriented information written with a view towards law enforcement and justification of the HGN tests. Please be aware that HGN testing as a field sobriety test is fraught with problems, inaccuracies, false and voodoo science, and just plain misunderstanding in its administration and application. NATIONAL TRAFFIC LAW CENTER DESCRIPTION
PREFACE
ACKNOWLEDGMENTS
FOREWORD
INTRODUCTION
THE SCIENCE Section I: What is "Nystagmus"
Section II: Alcohol and Nystagmus
Section III: The Horizontal Gaze Nystagmus (HGN) Test
Section IV: Other Types of Nystagmus THE LAW Section V: HGN in the Courtroom CONCLUSION GLOSSARY APPENDICES COMBINED TEST SCORING PROCEDURE ....APPENDIX A
ILLUSTRATIONS OF THE HGN TEST.... APPENDIX B
HGN STATE CHART SUMMARY.... APPENDIX C
HGN STATE CASE LAW SUMMARY.... APPENDIX D
STATE STANDARDS FOR ADMITTING SCIENTIFIC EVIDENCE....APPENDIX E
BIBLIOGRAPHY OF HGN STUDIES AND ARTICLES.... APPENDIX F
AMERICAN OPTOMETRIC ASSOCIATION HGN RESOLUTION ....APPENDIX G
PREDICATE QUESTIONS: ARRESTING/SFST OFFICER.... APPENDIX H
PREDICATE QUESTIONS: RESEARCHER ....APPENDIX I
PREDICATE QUESTIONS: SFST INSTRUCTOR.... APPENDIX J
PREDICATE QUESTIONS: OPTOMETRIST ....APPENDIX K
PREDICATE QUESTIONS: EMERGENCY ROOM PHYSICIAN ....APPENDIX L
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