Human beings frequently describe from memory events they have observed, and
most people consider these descriptions to be accurate. However, scientifi
c research on memory in the last few decades has revealed that people's mem
ories are often inaccurate. These errors in memory are systematic and are e
specially likely to occur for the kinds of events that are reported in cour
troom testimony: reports of strangers performing brief, violent or unexpect
ed acts that are frightening to the observer/witness. This article examines
the research on factors that affect the accuracy of initial observation, e
ncoding and remembering and forgetting such events. The authors consider th
e special memory issues involved in describing and identifying strangers an
d how these can impair the accuracy of eyewitness identifications. Througho
ut the review of the research findings, the authors consider their impact o
n courtroom procedures governing eyewitness testimony and identification. T
he article concludes with a set of policy recommendations based on this sci
entific evidence.