210 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS (lO) (11) (12) (13) (14) Workload," in Proceedings of the Human Factors Society (Santa Monica, California, 1988), pp. 1458- 1462. (9) J. P. Gluckman, J. S. Warm, W. N. Dember, J. A. Thiemann, and P. A. Hancock, Subjective workload in simultaneous and successive vigilance tasks. Paper presented at the meeting of the Psychonomic Society, Chicago, 1988. J. D. Zuercher, The effects of extraneous stimulation on vigilance, Human Factors, 7, 101-106 (1965). W. G. Davenport, Vigilance and arousal: Effects of different types of background stimulation, J. Psych., 82, 339-346 (1972). J. J. McGrath, "Irrelevant Stimulation and Vigilance Performance," in Vigilance.' A Symposium, D. N. Buckner and J. J. McGrath, Eds. (McGraw-Hill, New York, 1963), pp. 3-21. M. E. Keister and R. J. McLaughlin, Vigilance performance related to extraversion-introversion and caffeine, J. Exper, Res. in Pers., 6, 5-11 (1972). M. Loeb, G. R. Hawkes, W. O. Evans, and E. A. Alluisi, The influence of d-amphetamine, ben- actyzine and chlorpromazine on performance in an auditory vigilance task, Psychon. Sci., 3, 29-30 (1965). (15) A.D. Baddeley, Human Memory.' Theory and Practice (Allyn and Bacon, Boston, 1990), pp. 67-95. (16) M. C. Gerald, Pharmacology: An Introduction to Drugs (Prentice-Hall, Englewood-Cliffs, New Jersey, 1981), pp. 178-192. (17) J. T. E. Richardson and G. M. Zucco, Cognition and olfaction: A review, Psychol. Bull., 105, 325-360 (1989). (18) R. Sekuler and R. Blake, Perception, 2nd. ed. (Knopf, New York, 1990), pp. 384-423. (19) J. R. King, "Anxiety Reduction Using Fragrances," in Perfumery: The Psychology and Biology of Fra- grance, S.S. Van Toller and G. H. Dodd, Eds. (Chapman and Hall, London, 1988), pp. 147-166. (20) T. S. Lorig and G. E. Schwartz, Brain and odor: I. Alteration of human EEG by odor administration, Psychobiol., 16, 281-284 (1988). (21) G. E. Schwartz, D. Whitehorn, J. C. Hernon, and M. Jones, Subjective and respiratory differenti- ation of fragrances: Interactions with hedonics, Psychobiol., 23, 460 (1986). (22) H. Yoshitake, Three characteristic patterns of subjective fatigue symptoms, Ergonomics, 21, 231-233 (1978). (23) E. Hoddes, V. Zarcone, H. Smythe, R. Phillips, and W. C. Dement, Quantification of sleepiness: A new approach, Psychophysiol., 10, 431-436 (1973). (24) F. T. Eggemeier, "Properties of Workload Assessment Techniques," in Human Mental Workload, P. A. Hancock and N. Meshkati, Eds. (Elsevier, Amsterdam, 1988), pp. 41-62. (25) S. G. Hart and L. E. Staveland, "Development of NASA-TLX (Task Load Index): Results of Empir- ical and Theoretical Research," in Human Mental Workload, P. A. Hancock and N. Meshkati, Eds. (Elsevier, Amsterdam, 1988), pp. 139-183. (26) A. Craig and W. P. Colquhoun, "Vigilance: A Review," in Human Reliability in Quality Control, C. G. Drury and J. G. Fox, Eds. (Taylor and Francis, London, 1975), pp. 71-87. (27) J. W. Scott, "The Central Olfactory Connections and Their Cells of Origin," in Taste, Olfaction, and the Central Nervous System," D. W. Pfaff, Ed. (The Rockefeller University Press, New York, 1985), pp. 282-283. (28) R. Parasuraman, "The Psychobiology of Sustained Attention," in Sustained Attention in Human Per- formance, J. S. Warm, Ed. (Wiley, Chichester, U.K., 1984), pp. 61-101. (29) R. B. Welch and D. H. Warren, "Intersensory Interactions," in Handbook of Perception and Human Performance, K. R. Boff, L. Kaufman, and J. P. Thomas, Eds. (Wiley, New York, 1986), Vol. 1, pp. 25-1-25-36.