An experiment was conducted to investigate the claim that human performance may be enhanced by exposure to artificially high concentrations of negative air ions. 16 subjects, only half of whom were informed of the ion level in each session, performed reasoning, psychomotor, and memory-search tasks. Despite adequate control of confounding variables, no clear evidence was obtained in support of the view that negative ions in the air influence performance.
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References
1.
AlbrechtsenO.ClausenV.ChristensenF. G.JensenJ. G., & MollerT.The influence of small atmospheric ions on human well-being and mental performance. Int. J. Biometeor., 1978, 22, 249–262.
2.
AnscombeF. J.Examination of residuals. Proc. 4th Berkeley Symposium Math. Statist. & Prob., 1961, 1, 1–36.
3.
AssaelM.PfeiferY., & SulmanF. G.Influence of artificial air ionization on the human electroencephalogram. Int. J. Biometeor., 1974, 18, 306–312.
4.
BaddeleyA. D.A 3-min. reasoning test based on grammatical transformation. Psychon. Sci., 1968, 10, 341–342.
5.
CohenH. H.ConradD. W.O'BrienJ. F., & PearsonR. G.Noise effects, arousal, and human information processing task difficulty and performance. Dept. of Psychology and Industrial Engineering, North Carolina State Univer., Raleigh, NC, 1973.
6.
DanonA., & SulmanF. G.Ionizing effect of winds of ill repute on serotonin metabolism. In TrompS. W. & WeiheW. H. (Eds.), Biometeorology 4. Suppl. Int. J. Biometeor., 1969, 13, 135–136.
7.
HalcombC. G., & KirkR. E.Effects of air ionization upon the performance of a vigilance task. J. eng. Psychol., 1965, 4, 120–126.
8.
HawkinsL. H., & BarkerT.Air ions and human performance. Ergonomics, 1978, 21, 273–278.
9.
JohnJ. A., & QuenouilleM. H.Experiments: Design and analysis. London: Griffin, 1977.
10.
KendallM. G., & StuartA.The advanced theory of statistics. Vol. 3. London: Griffin, 1968.
11.
KnollM.RheinsteinJ.LeonardG. F., & HighbergP. W.Influence of light air ions on human visual reaction time. I.R.E. Trans. Biomed. Electron., 1961, 8, 239–245.
12.
KruegerA. P.Are air ions biologically significant? A review of a controversial subject. Int. J. Biometeor., 1972, 16, 313–322.
13.
KruegerA. P.Are negative ions good for you?New Scientist, 1973, 58, 668–670.
14.
McDonaldR. D.BachmanC. H., & LorenzP. J.Some psychomotor and physiological tests on humans exposed to air ions. Aerosp. Med., 1967, 38, 145–148.
15.
McGurkF. C. J.Psychological effects of artificially produced air ions. Amer. J. phys. Med., 1959, 38, 136–137.
16.
OlivereauJ-M.L'ionisation atmospherique et ses consequences sur le comportement des animaux et de l'homme. Année Psychol., 1976, 76, 213–244.
17.
RuoccoJ. N.Effect of ionized air on visual reaction time of human subjects. Dissert. Abstr., 1963, 23, 3502–3503.
18.
SloteL.An experimental evaluation of man's reaction to an ionized air environment. Unpublished Ph.D. thesis, College of Engineering, Research Division, New York Univer., 1961.
19.
SternbergS.High-speed scanning in human memory. Science, 1966, 153, 652–654.
20.
SulmanF. G.Effect of heat stress on release of catecholamines, serotonin and other hormones. Abstracts, IV Int. Congr. on Pharmacol., Schwabe, Basel, 1969.
21.
SulmanF. G.LevyD.LevyA.PfeiferY.SuperstineE., & TalE.Air ionometry of hot, dry desert winds (Sharav) and treatment with air ions of weather-sensitive subjects. Int. J. Biometeor., 1974, 18, 313–318.
22.
WinerB. J.Statistical principles in experimental design. New York: McGraw-Hill, 1962.
23.
WoffordJ. C.Negative ionization: An investigation of behavioral effects. J. exp. Psychol, 1966, 71, 608–611.
