[Color vision].

INTRODUCTION .......................................................................................................... 42 Trichromacy and the Trichromatic Theory .............................................................. 42 Psychol~hysical l~$timates of the Cone Sensitivities .................................................... 44 The Two-Color Procedure and the ~" Mechanisms .................................................. 45 Postreceptorol P cesses .............................................................................................. 48 Color Deficiency .......................................................................................................... 49 RECENT REVIEWS AND BIBLIOGRAPHIC SOURCES, TESTS, PERSONALIA .............................................................................................. 49 Books .......................................................................................................................... 49 Journals ...................................................................................................................... 50 Reviews and Specialist Bibliographies ........................................................................ 50 New Tests and, clOth,Other Materials ................................................................................ 51 Necrology .................................................................................................................... 51 THE FUNDAMENTAL SENSITIVITIES .................................................................. 52 Psychophysical Estimates ............................................................................................ 52 Microspectrophotometry .............................................................................................. 57 Concordance of Estimates of the Human Fundamentals. .. ...................................... 59 Individual Differences ................................. : .............................................................. 61 THE ANOMALIES OF THE SHORTWAVE SYSTEM ............................................ 63 Group A: Sensitivity of Short-Wavelength System .................................................... 63 Group B: Adaptational Anomalies ............................................................................ 66 Two Explanatory P inciples ........................................................................................ 67 COLOR-OPPONENT CHANNELS .............................................................................. 68 Pn’mate Electrophysiology .......................................................................................... 68 Psychophysical Techniques for Isolating Color-Opponent Channels .......................... 68 Chromatically Opponent Processes Manifested in Threshold Measurements ........................................................................................................ 70 Possible Identity of Opponent Mechanisms Revealed by Changes in . Sensitivity, by Phenomenological Cancellation, and by Chromaticity Discrimination .......................................................................................... 72 DO STILES’S ~MECHANISMS CORRESPOND TO CONE FUNDAMENTALS? .................................................................................... 73 Experimental Tests .................................................................................................... 73 A Theory of~’1 and tr3 .............................................................................................. 75 Self-Screening ............................................................................................................ 75 Conclusions ................................................................................................................ 76