Examines selected recent and current research on eyewitness performance including research on the effects of witness and crime characteristics.  Particular emphasis is given to the impact on witness errors of police identification procedures such as methods of foil selection, mug shots, show-ups, photo arrays and lineups, and alternative methods for presenting lineups to witnesses.  Attention is also given to the strengths and weaknesses of alternative eyewitness research methods including laboratory and field experiments and archival studies.