SUBJECT INDEX 



535 



Individual differences, 51, 134, 347, 351, 375, 379, 



381, 390, 392, 393 

 listening in noise, 234 

 voice 



intelligibility in noise, 235 

 Infantry men, 351 

 Instruments 

 check reading, 92 

 design problems 



illustrations, 94 

 face markings, 77 



contrast, 77 



dimensions of scale marks, 78 



figure dimensions, 78 

 illumination, 77, 78, 82 



color and source, 82 



intensity, 82 

 interpolation errors, 85 

 labeling, 81 

 quantitative data, 84 



counter vs. scale, 84 



divided scales (verniers), 90 



emphasizing scale marks, 88 



non-uniform scales, 90 



numbering scale marks, 89 



pointer design, 91 



scale design, 85 



scale form, 92 

 reading 



dark adaptation, 77 



operations, 77 

 Intelligibility scores, 351 

 Irradiance (See Radiometry) 



Job 

 analysis, 492, 497, 510 



leadership, 479, 485 

 efficiency, 345 

 performance 



criteria, 502, 510 



Leader 

 characteristics 

 methods of changing 

 selection, 476, 479, 484, 485 

 training, 476, 483, 484, 485 

 on-the-job, 484 

 role-plajing, 483 

 traditional methods, 483 

 -follower relations 

 concepts, 477 

 methods of study 

 clinical, 478 

 empirical, 477 

 experimental, 477 

 Leadership 

 as a factor in group effectiveness, 475, 485 (See 

 also Group effectiveness) 



criteria of performance, 478, 485 

 judgments of leader, 479 

 measures of group effectiveness, 479 

 miscellaneous criteria, 480 

 effectiveness in different situations, 478 

 formal vs. functional aspects, 475 



methods of observing, 476 

 job analysis, 479, 485 

 selection methods 



personality assessment, 481, 485 

 Learning, 134, 136 

 Light and color, 43 

 Localization 



auditory (See Audition, localization of sound) 

 Luminous flux (See Photometry) 

 Luminous intensity (See Photometry) 



Macula (See Ear, inner) 

 Manipulative device 



variables, 147 

 Man-machine relation, 133 (See also Efficiency) 

 control system 



operator as an element, 135, 149 

 sense modalities, 144 

 type of data available, 144 

 deficiencies in available data, 142, 149 

 efficiency 

 defined, 177 

 for industrial situation, 177 

 for military situation, 177 

 operator characteristics, 134 

 change of operator, 146 

 effect of stress, 136 

 fatigue, 146 



individual differences, 134 

 learning effect, 134, 136 

 methods of controlling, 134, 146 

 movement, 140 

 need for information, 140 

 receptive, 140 

 transmission, 140, 150 

 operator movement 



transformation, 148 

 operator performance 

 confused with system performance, 141 

 specific to a given system, 142, 147, 150 

 proprioceptive cues, 148 

 Maps 



reading, 61, 71 

 Masking 



noise, 345, 348 

 of speech 

 effect of complex tones, 244 

 effect of pure tones, 244 

 white noise 

 effect of meaning of noise, 244 

 effect of phase relations between ears, 244 

 effect of temporal continuity, 244 



