538 



SUBJECT INDEX 



Pitch discrimination, 345 (See also Discrimination, 



auditory) 

 Print 



perception at a distance, 67 

 Printed materials 



reading, 61 

 Psychogenic factors 



in motion sickness (See Motion sickness) 

 Psychologists 



experimental 

 function, 517 

 number available, 517 

 training recommendations, 518 

 Psychomotor performance 



and noise, 345 

 Psychophysical tasks, 352 

 Psychophysics 



radar research, 106 

 Purkinje phenomenon, 10 

 Pursuit 



coordinated serial, 348 

 Pursuitimeter test 



airplane, 206 



Radar 



target evaluation, 127 

 viewing, 101 

 Radiance (See Radiometry) 

 Radiant 

 emittance (See Radiometry) 

 energy (See Radiometry) 

 flux (See Radiometry) 

 intensity (See Radiometry) 

 purity (See Radiometry) 

 Radio code reception, 346 



Radio range, 201, 204 (See also Auditory signals) 

 Radiometry, 45 

 Reaction time 



serial disjunctive, 348 

 Reading 

 charts and maps 



analysis of requisite skills, 71 

 color and night lighting, 73, 74 

 fatigue, 74 



perceptual patterns, 74 

 symbols, 73 

 typography, 73 

 factors 



illumination, 61, 64, 69, 74 

 technique, 61, 66, 70, 74 

 typography, 61. 62, 68, 74 

 graphs, 70 



mathematical formulae, 70 

 numerals, 68 

 fatigue, 70 

 illumination, 69 

 typography, 68 

 printed text, 61 



good quality, 61 

 illumination 

 short periods, 64 

 sustained reading, 65 

 measurement methods, 61 

 microfilm, 67 

 poor quality, 67 

 scales, 70 

 tables, 70 

 Receptors 

 labyrinthine, 403, 411 (See also Ear, inner) 

 effective stimulus, 403, 411 

 mechanics of, 403, 406, 412 

 model of mode of action, 404, 410, 411 

 physiology of, 403 

 thresholds, 407 

 Respiration rate, 347, 348 

 Retina 



sensitivity, 8 

 Reversible prospective 



frequency of, 348 

 Rheobase, 407 

 Rotary pursuit, 348 



Saccadic movements, 348 

 Saccule (See Ear, inner) 

 Scaling 



psychological, 208 

 Sea conditions 



forecasting, 412 

 Seasickness (See Motion sickness) 

 Selection (See Personnel) 

 Selection and placement 



dependent on policy, 491 

 Semi -circular canals (See Ear, inner) 

 Sensation 



visual, 44 

 measurement, 55 

 Servo-system 



defined, 143 

 Sickness-inducing machines, 408, 411, 412 

 Signal level, 345 

 Signal system 



tonal, 202, 205 

 Signals 



auditory (See Auditor}') 

 Skin 



as black body radiator, 281 



temperature relative to operating temperature, 

 295 

 Sleep-wakefulness cycle 



diurnal body temperature, 329 



habitability factors, 329 



shift, 330 



ship operation, 330 



socially determined, 329 



submarine crew, 330 

 Socialization, 442 



