title: Geophysical variables and behavior: V. Human performance in ionized air.
abstract: 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.
mesh_terms: D000328:Adult; D000390:Air Ionization; D004193:Discrimination Learning; D006801:Humans; D008297:Male; D011939:Mental Recall; D009048:Motor Skills; D010364:Pattern Recognition, Visual; D011340:Problem Solving; D011930:Reaction Time