536 



SUBJECT INDEX 



Memory span, 253 

 Mental arithmetic, 349 

 Mental skills, 348 

 Menus 



central planning agency, 322 

 Metabolism, 347 



environmental temperature, 275 

 related to activity, 273 

 Monocular distance judgments, 348 

 Morale, 432, 433 

 defined, 441 



as group effectiveness, q.v., 465 

 group, 463 

 scientific status, 463, 475, 484 

 Motion 



in relation to semi-circular canals, q.v., 406 

 of naval vessels, 399, 412 

 action of waves upon, 402 

 assumption of type of motion, 399, 400, 402 

 characteristics of ship, 401 

 periodic, 402 



pitch, roll, and wave spectrum, 402 

 relation to labyrinthine receptors, 405 

 submarines, 402 



use of instruments in determining, 401 

 periodic, 375 



pitching, 400, 405, 406, 412 

 rolling, 400, 405, 406, 412 

 scending, 400, 412 



sickness, 375, 377, 399, 400, 402, 407, 412, 424 

 adaptation, 377, 378, 379, 381, 384, 392 



duration, 384 

 anti-cholinergic drugs, 424, 434 

 attitudes, 375, 385 

 brain activity, 391 

 chronic, 376, 379, 393 

 criteria, 376, 381, 392 

 disqualification for military service, 377 

 effect of air temperature, 388 

 effect of auxiliary factors 

 acceleration 



effect on viscera and blood column, 387 

 condition of stomach, 388 

 eflBciency, 376 



in air- and seaborne troops, 378 

 in aircraft, 377 

 incidence, 375, 377, 378, 381, 392, 408, 410 



methods of reduction, 379 

 in submarines, 377 

 nervous system, 391 

 odora, 375 



physical features, 399, 402, 405, 408, 409 

 physiological factors, 390, 393 

 psychogenic factors, 388, 393 

 fear, 388, 392 



personality traits, 388, 392 

 suggestion, 388, 390, 392 

 reduction 



control of auxiliary factors, 379, 380, 386 

 head position, 386, 387, 392, 393 

 vision, 386, 392 



design of vehicles, 379, 380, 386 



indoctrination, 385 



reliability of methods, 387 



use of drugs, 379, 385, 392, 393 

 research surveys, 377 

 selection for resistance to, 379, 393 



combination of methods, 382 



observation in actual situation, 381, 383 



reliability of techniques, 382 



use of emetic drugs, 381, 384 



use of interviews, 381, 383 



use of labyrinthine tests, 381, 383 



use of mechanical devices, 381, 393 



use of questionnaires, 381, 382, 393 



validity of methods, 383 

 severity rating, 376, 381 

 sickness index, 409, 410, 411 

 susceptibility 



individual differences, 375, 379, 381, 390, 392, 

 393 

 symptom of neurosis, 388 

 symptoms, 375, 381, 392, 407, 409 

 vestibular apparatus, 375, 391 

 vision, 375, 379, 392 

 weather conditions, 377 

 Motivation, 450, 456 

 Muscle tension, 347, 349 



Nausea, 409 

 Naval architecture, 412 

 Nervous system, 391, 399, 407 

 and motion sickness, 391, 399 

 autonomic, 375, 407 

 central, 407, 412, 418, 419, 421 



feedback of emotion upon, 427 

 receptors, 399, 403, 408, 411 

 Neural response, 407, 412 

 afferent, 399 

 frequency, 403 



in relation to stimulus, 403, 404 

 latency, 407 

 persistent, 403, 405 

 Night lookout, 352 

 Noise 

 airborne, 345 

 and communication 



effect of practice, 351 

 continued high intensity, 346, 350 

 Diesel engine, 345, 346 

 effect 



on auditory functions, 345, 351 



on communication, 351 



on physical functions, 352 



on physiological functions, 345, 347 



on production, 348 



