A Literature Review
on Reaction Time
by Robert J. Kosinski
Reaction time has a been a favorite subject of experimental psychologists since the middle of the nineteenth century. However, most studies ask questions about the organization of the brain, so the authors spend a lot of time trying to determine if the results conform to some mathematical model of brain activity. This makes these papers hard to understand for the beginning student. In this review, I have ignored these brain organization questions and summarized the major literature conclusions that are applicable to undergraduate laboratories using my Reaction Time software.
I hope this review helps you write a good report on your reaction time experiment. I also apologize to reaction time researchers for omissions and oversimplifications.
Simple vs. Recognition vs. Choice Experiments
Number of possible valid stimuli
Psychologists have named three basic kinds of reaction time experiments (Luce, 1986; Welford, 1980):
In simple reaction time experiments, there is only one stimulus and one response. 'X at a known location,' 'spot the dot,' and 'reaction to sound' all measure simple reaction time.
In recognition reaction time experiments, there are some stimuli that should be responded to (the 'memory set'), and others that should get no response (the 'distractor set'). There is still only one correct response. 'Symbol recognition' and 'tone recognition' are both recognition experiments.
In choice reaction time experiments, the user must give a response that corresponds to the stimulus, such as pressing a key corresponding to a letter if the letter appears on the screen. The Reaction Time program does not use this type of experiment because the response is always pressing the spacebar.
By the way, professional psychologists doing these experiments typically employ about 20 people doing 100-200 reaction times each...per treatment (Luce, 1986, Ch. 6)! Sanders (1998, p. 23) recommends an adequate period of practice, and then collection of 300 reaction times per person. Our experiments of 3 or 4 people doing 10 reaction times each are very small.
Mean Reaction Times
For about 120 years, the accepted figures for mean simple reaction times for college-age individuals have been about 190 ms (0.19 sec) for light stimuli and about 160 ms for sound stimuli (Galton, 1899; Fieandt et al., 1956; Welford, 1980; Brebner and Welford, 1980).
Simple vs. Recognition vs. Choice Reaction Times
The pioneer reaction time study was that of Donders (1868). He showed that a simple reaction time is shorter than a recognition reaction time, and that the choice reaction time is longest of all. Laming (1968) concluded that simple reaction times averaged 220 msec but recognition reaction times averaged 384 msec. This is in line with many studies concluding that a complex stimulus (e.g., several letters in symbol recognition vs. one letter) elicits a slower reaction time (Brebner and Welford, 1980; Teichner and Krebs, 1974; Luce, 1986). An example very much like our experiment was reported by Surwillo (1973), in which reaction was faster when a single tone sounded than when either a high or a low tone sounded and the subject was supposed to react only when the high tone sounded.
Miller and Low (2001) determined that the time for motor preparation (e.g., tensing muscles) and motor response (in this case, pressing the spacebar) was the same in all three types of reaction time test, implying that the differences in reaction time are due to processing time.
Numer of possible valid stimuli. Several investigators have looked at the effect of increasing the number of possible stimuli in recognition and choice experiments. Hick (1952) found that in choice reaction time experiments, response was proportional to log(N), where N is the number of different possible stimuli. In other words, reaction time rises with N, but once N gets large, reaction time no longer increases so much as when N was small. This relationship is called "Hick's Law." Sternberg (1969) maintained that in recognition experiments, as the number of items in the memory set increases, the reaction time rises proportionately (that is, proportional to N, not to log N). Reaction times ranged from 420 msec for 1 valid stimulus (such as one letter in symbol recognition) to 630 msec for 6 valid stimuli, increasing by about 40 msec every time another item was added to the memory set. Nickerson (1972) reviewed several recognition studies and agreed with these results.
Type of Stimulus
Many researchers have confirmed that reaction to sound is faster
reaction to light, with mean auditory reaction times being 140-160 msec
and visual reaction times being 180-200 msec (Galton, 1899; Woodworth
Schlosberg, 1954; Fieandt et al., 1956; Welford, 1980; Brebner
Welford, 1980). Perhaps this is because an auditory stimulus only takes
8-10 msec to reach the brain (Kemp et al., 1973), but a visual
takes 20-40 msec (Marshall et al., 1943). Reaction time to
is intermediate, at 155 msec (Robinson, 1934). Differences in reaction
time between these types of stimuli persist whether the subject is
to make a simple response or a complex response (Sanders, 1998, p.
Froeberg (1907) found that visual stimuli that are longer in duration elicit faster reaction times, and Wells (1913) got the same result for auditory stimuli.
Piéron (1920) and Luce (1986) reported that the weaker the
(such as a very faint light) is, the longer the reaction time is.
after the stimulus gets to a certain strength, reaction time becomes
In other words, the relationship is:
Kohfeld (1971) found that the difference between reaction time to
and sound could be eliminated if a sufficiently high stimulus intensity
If variation caused by the type of reaction time experiment, type of stimulus, and stimulus intensity are ignored, there are still many factors affecting reaction time.
Arousal. One of the most investigated
affecting reaction time is 'arousal' or state of attention, including
tension. Reaction time is fastest with an intermediate level of
and deteriorates when the subject is either too relaxed or too tense
1980; Broadbent, 1971; Freeman, 1933). That is, reaction time responds
to arousal as follows:
Etnyre and Kinugasa (2002) found that subjects who had to react to
auditory stimulus by extending their leg had faster reaction times if
performed a 3 second isometric contraction of the leg muscles prior to
the stimulus. You might expect that the muscle contraction itself would
be faster (because the muscle was warmed up, etc.), but what was
was that the precontraction part of the reaction time was shorter too.
It was as if the isometric contraction allowed the brain to work
Age. Reaction time shortens from infancy into the late 20s, then increases slowly until the 50s and 60s, and then lengthens faster as the person gets into his 70s and beyond (Welford, 1977; Jevas and Yan, 2001; Luchies et al., 2002; Rose et al., 2002). Luchies et al.(2002) also reported that this age effect was more marked for complex reaction time tasks. Reaction time also becomes more variable with age (Hultsch et al., 2002). Welford (1980) speculates on the reason for slowing reaction time with age. It is not just simple mechanical factors like the speed of nervous conduction. It may be the tendency of older people to be more careful and monitor their responses more thoroughly (Botwinick, 1966). When troubled by a distraction, older people also tend to devote their exclusive attention to one stimulus, and ignore another stimulus, more completely than younger people (Redfern et al., 2002). Lajoie and Gallagher (2004) found that old people who tend to fall in nursing homes had a significantly slower reaction time than those that did not tend to fall. An early study (Galton, 1899) reported that for teenagers (15-19) mean reaction times were 187 msec for light stimuli and 158 ms for sound stimuli. Reaction times may be getting slower, because we hardly ever see a Clemson freshman (or professor) who is that fast.
Gender. At the risk of being politically incorrect, in almost every age group, males have faster reaction times than females, and female disadvantage is not reduced by practice (Noble et al., 1964; Welford, 1980; Adam et al., 1999; Dane and Erzurumlugoglu, 2003). Bellis (1933) reported that mean time to press a key in response to a light was 220 msec for males and 260 msec for females; for sound the difference was 190 msec (males) to 200 msec (females). In comparison, Engel (1972) reported a reaction time to sound of 227 msec (male) to 242 msec (female). Botwinick and Thompson (1966) found that almost all of the male-female difference was accounted for by the lag between the presentation of the stimulus and the beginning of muscle contraction. Muscle contraction times were the same for males and females. In a surprising finding, Szinnai et al. (2005) found that gradual dehydration (loss of 2.6% of body weight over a 7-day period) caused females to have lengthened choice reaction time, but males to have shortened choice reaction times. Adam et al. (1999) reported that males use a more complex strategy than females. Barral and Debu (2004) found that while men were faster than women at aiming at a target, the women were more accurate. Jevas and Yan (2001) reported that age-related deterioration in reaction time was the same in men and women.
Left vs. right hand. The hemispheres of the cerebrum are specialized for different tasks. The left hemisphere is regarded as the verbal and logical brain, and the right hemisphere is thought to govern creativity and spatial relations, among other things. Also, the right hemisphere controls the left hand, and the left hemisphere controls the right hand. This has made researchers think that the left hand should be faster at reaction times involving spatial relationships (such as pointing at a target). The results of Boulinquez and Bartélémy (2000) and Bartélémy and Boulinquez (2001 and 2002) all supported this idea. Dane and Erzurumluoglu (2003) found that in handball players, the left-handed people were faster than right-handed people when the test involved the left hand, but there was no difference between the reaction times of the right and left handers when using the right hand. Finally, although right-handed male handball players had faster reaction times than right-handed women, there was no such sexual difference between left-handed men and women. The authors concluded that left-handed people have an inherent reaction time advantage. In an experiment using a computer mouse, Peters and Ivanoff (1999) found that right-handed people were faster with their right hand (as expected), but left-handed people were equally fast with both hands. The preferred hand was generally faster. However, the reaction time advantage of the preferred over the non-preferred hands was so small that they recommended alternating hands when using a mouse. Bryden (2002), using right-handed people only, found that task difficulty did not affect the reaction time difference between the left and right hands.
Direct vs. Peripheral Vision.
and Welford (1980) cite literature that shows that visual stimuli
by different portions of the eye produce different reaction times. The
fastest reaction time comes when a stimulus is seen by the cones (when
the person is looking right at the stimulus). If the stimulus is picked
up by rods (around the edge of the eye), the reaction is slower. Ando et
al., 2002 found that practice on a visual stimulus in central
shortened the reaction time to a stimulus in peripheral vision, and vice
Practice and Errors. Sanders (1998, p. 21) cited studies showing that when subjects are new to a reaction time task, their reaction times are less consistent than when they've had an adequate amount of practice. Also, if a subject makes an error (like pressing the spacebar before the stimulus is presented), subsequent reaction times are slower, as if the subject is being more cautious. Ando et al. (2002) found that reaction time to a visual stimulus decreased with three weeks of practice, and the same research team (2004) reported that the effects of practice last for at least three weeks. Rogers et al. (2003) found that training older people to resist falls by stepping out to stabilize themselves did improve their reaction time.
Fatigue. Welford (1968, 1980) found that reaction time gets slower when the subject is fatigued. Singleton (1953) observed that this deterioration due to fatigue is more marked when the reaction time task is complicated than when it is simple. Mental fatigue, especially sleepiness, has the greatest effect. Kroll (1973) found no effect of purely muscular fatigue on reaction time. Philip et al. (2004) found that 24 hours of sleep deprivation lengthened the reaction times of 20-25 year old subjects, but had no effect on the reaction times of 52-63 year old subjects. Takahashi et al. (2004) studied workers who were allowed to take a short nap on the job, and found that although the workers thought the nap had improved their alertness, there was no effect on choice reaction time.
Fasting. Three days without food does not decrease reaction time, although it does impair capacity to do work (Gutierrez et al., 2001).
Distraction. Welford (1980) and Broadbent (1971) reviewed studies showing that distractions increase reaction time. Richard et al. (2002) and Lee et al. (2001) found that college students given a simulated driving task had longer reaction times when given a simultaneous auditory task. They drew conclusions about the safety effects of driving while using a cellular phone or voice-based e-mail. Redfern et al. (2002) found that subjects strapped to a platform that periodically changed orientation had slowed reaction time before and during platform movement. The reaction time to auditory stiimuli was more affected than response to visual stimuli.
Warnings of Impending Stimuli. Brebner and Welford (1980) report that reaction times are faster when the subject has been warned that a stimulus will arrive soon. In the Reaction Time program, the delay is never more than about 3 sec, but these authors report that even giving 5 minutes of warning helps. Bertelson (1967) found that as long as the warning was longer than about 0.2 sec., the shorter the warning was, the faster reaction time was. This effect probably occurs because attention and muscular tension cannot be maintained at a high level for more than a few seconds (Gottsdanker, 1975).
Warnings about Impairment by Alcohol. Fillmore and Blackburn (2002) found that subjects who had drunk an impairing dose of alcohol reacted faster when they were warned that this was enough alcohol to slow their reaction time. Unwarned subjects who drank suffered more decreased reaction times. However, the warned subjects were also less inhibited and careful in their responses. Even subjects who drank some nonalcoholic beverage and then were warned (falsely) about impairment by alcohol reacted faster than unwarned subjects who drank the same beverage.
Order of Presentation. Welford (1980), Laming (1968) and Sanders (1998) observed that when there are several types of stimuli, reaction time will be faster where there is a 'run' of several identical stimuli than when the different types of stimuli appear in mixed order. This is called the "sequential effect." Hsieh (2002) found that the shifting of attention between two different types of tasks caused an increase in reaction time to both tasks.
Breathing Cycle. Buchsbaum and Calloway (1965) found that reaction time was faster when the stimulus occurred during expiration than during inspiration.
Finger Tremors. Brebner and Welford (1980) report that fingers tremble up and down at the rate of 8-10 cycles/sec, and reaction times are faster if the reaction occurs when the finger is already on the 'downswing' part of the tremor.
Personality Type. Brebner (1980) found that extroverted personality types had faster reaction times, and Welford (1980) and Nettelbeck (1973) said that anxious personality types had faster reaction times. Lenzenweger (2001) found that the reaction times of schizophrenics was slower than those of normal people, but their error rates were the same. Robinson and Tamir (2005) found that neurotic college students had more variable reaction times than their more stable peers.
Exercise. Exercise can affect reaction time. Welford (1980) found that physically fit subjects had faster reaction times, and both Levitt and Gutin (1971) and Sjoberg (1975) showed that subjects had the fastest reaction times when they were exercising sufficiently to produce a heartrate of 115 beats per minute. Kashihara and Nakahara (2005) found that vigorous exercise did improve choice reaction time, but only for the first 8 minutes after exercise. Exercise had no effect on the percent of correct choices the subjects made. On the other hand, McMorris et al. (2000) found no effect of exercise on reaction time in a test of soccer skill, and Lemmink and Visscher (2005) found that choice reaction time and error rate in soccer players were not affected by exercise on a stationary bicycle. Collardeau et al. (2001) found no post-exercise effect in runners, but did find that exercise improved reaction time during the exercise. They attributed this to increased arousal during the exercise.
Punishment. Shocking a subject when he reacts slowly does shorten reaction time (Johanson, 1922; Weiss, 1965). Simply making the subject feel anxious about his performance has the same effect, at least on simple reaction time tasks (Panayiotou, 2004).
Stimulant Drugs. Caffeine has often been studied in connection with reaction time. Lorist and Snel (1997) found that moderate doses of caffeine decreased the time it took subjects to find a target stimulus and to prepare a response for a complex reaction time task. Durlach et al. (2002) found that the amount of caffeine in one cup of coffee did reduce reaction time and increase ability to resist distraction, and did so within minutes after consumption. McLellan et al. (2005) found that soldiers in simulated urban combat maintained their marksmanship skills and their reaction times through a prolonged period without sleep better when given caffeine. Liguori et al. (2001) found that caffeine can reduce the slowing effect of alcohol on reaction time, but can't prevent other effects such as body sway. On the other hand, Linder (2001), using our software and a "Spot-the-Dot" test, found that drinking one can of either a caffeinated or a caffeine-free cola had no detectable effect on reaction time. Kleemeier et al. (1956) found that administering an amphetamine-like drug to a group of elderly men did not make their reaction times faster, although it did make their physical responses more vigorous.
Intelligence. The tenuous link between intelligence and reaction time is reviewed in Deary et al. (2001). Serious mental retardation produces slower and more variable reaction times. Among people of normal intelligence, there is a slight tendency for more intelligent people to have faster reaction times, but there is much variation between people of similar intelligence (Nettelbeck, 1980). The speed advantage of more intelligent people is greatest on tests requiring complex responses (Schweitzer, 2001).
Brain Injury. As might be
brain injury slows reaction time, but different types of responses are
slowed to different degrees (reviewed in Bashore and Ridderinkhof,
Collins et al. (2003) found that high school athletes with
and headache a week after injury had worse performance on reaction time
and memory tests than athletes with concussions but no headache a week
Minor upper respiratory tract infections slow reaction time, make mood
more negative, and cause disturbance of sleep (Smith et al., 2004).
Adam, J., F. Paas, M. Buekers, I. Wuyts, W. Spijkers and P. Wallmeyer. 1999. Gender differences in choice reaction time: evidence for differential strategies. Ergonomics 42: 327.
Ando, S., N. Kida and S. Oda. 2002. Practice effects on reaction
for peripheral and central visual fields. Perceptual and Motor
Ando, S, N. Kida and S Oda. 2004. Retention of practice effects on simple reaction time for peripheral and central visual fields. Perceptual and Motor Skills 98(3): 897-900.
Barral, J. and B. Debu. 2004. Aiming in adults: Sex and laterality
effects. Laterality: Assymmetries of
Body, Brain and Cognition 9(3): 299-312.
Barthélémy, S., and P. Boulinguez. 2001. Manual
reaction time asymmetries in human subjects: the role of movement
planning and attention. Neuroscience
Letters 315(1): 41-44.
Barthélémy, S., and P. Boulinguez. 2002. Orienting
visuospatial attention generates manual reaction time asymmetries in
target detection and pointing. Behavioral
Brain Research 133(1): 109-116.
Bashore, T. R. and K. R. Ridderinkhof. 2002. Older age, traumatic brain injury, and cognitive slowing: some convergent and divergent findings. Psychological Bulletin 128(1): 151.
Bellis, C. J. 1933. Reaction time and chronological age. Proceedings of the Society for Experimental Biology and Medicine 30: 801.
Bertelson, P. 1967. The time course of preparation. Quarterly Journal of Experimental Psychology 19: 272-279.
Botwinick, J. 1966. Cautiousness in advanced age. Journal of Gerontology 21: 347-353.
Botwinick, J. and L. W. Thompson. 1966. Components of reaction time in relation to age and sex. Journal of Genetic Psychology 108: 175-183.
Boulinguez. P. and S. Barthélémy. 2000. Influence of
the movement parameter to be controlled on manual RT asymmetries in
right-handers. Brain and
Cognition 44(3): 653-661.
Brebner, J. T. 1980. Reaction time in personality theory. In A. T. Welford (Ed.), Reaction Times. Academic Press, New York, pp. 309-320.
Brebner, J. T. and A. T. Welford. 1980. Introduction: an historical background sketch. In A. T. Welford (Ed.), Reaction Times. Academic Press, New York, pp. 1-23.
Broadbent, D. E. 1971. Decision and Stress. Academic Press, London.
Bryden, P. 2002. Pushing the limits of task difficulty for the right
and left hands in manual aiming. Brain
and Cognition 48(2-3): 287-291.
Buchsbaum, M. and E. Callaway. 1965. Influence of respiratory cycle on simple RT. Perceptual and Motor Skills 20: 961-966.
Collardeau, M., J. Brisswalter, and M. Audiffren. 2001. Effects of a prolonged run on simple reaction time of well-trained runners. Perceptual and Motor Skills 93(3): 679.
Collins, M. W., M. field, M. R. Lovell, G. Iverson, K. M. Johnston, J. Maroon, and F. H. Fu. 2003. Relationship between postconcussion headache and neuropsychological test performance in high school athletes. The American Journal of Sports Medicine (31(2): 168-174.
Dane, S. and A. Erzurumluoglu. 2003. Sex and handedness differences
in eye-hand visual reaction times in handball players. International Journal of Neuroscience
Deary, I. J., G. Der, and G. Ford. 2001. Reaction times and intelligence differences: A population-based cohort study. Intelligence 29(5): 389.
Donders, F. C. 1868. On the speed of mental processes. Translated by W. G. Koster, 1969. Acta Psychologica 30: 412-431.
Durlach, P. J., R. Edmunds, L. Howard, and S. P. Tipper. 2002. A
rapid effect of daffeinated beverages on two choice reaction time
tasks. Nutritional Neuroscience
Engel, B. T., P. R. Thorne, and R. E. Quilter. 1972. On the relationship among sex, age, response mode, cardiac cycle phase, breathing cycle phase, and simple reaction time. Journal of Gerontology 27: 456-460.
Etnyre, B. and T. Kinugasa. 2002. Postcontraction influences on reaction time (motor control and learning). Research Quaterly for Exerciseand Sport 73(3): 271-282.
Fieandt, K. von, A. Huhtala, P. Kullberg, and K. Saarl. 1956. Personal tempo and phenomenal time at different age levels. Reports from the Psychological Institute, No. 2, University of Helsinki.
Fillmore, M. T. and J. Blackburn. 2002. Compensating for alcohol-induced impairment: alcohol expectancies and behavioral disinhibition. Journal of Studies on Alcohol 63(2): 237.
Freeman, G. L. 1933. The facilitative and inhibitory effects of muscular tension upon performance. American Journal of Psychology 26: 602-608.
Froeberg, S. 1907. The relation between the magnitude of stimulus and the time of reaction. Archives of Psychology, No. 8.
Galton, F. 1899. On instruments for (1) testing perception of differences of tint and for (2) determining reaction time. Journal of the Anthropological Institute 19: 27-29.
Gottsdanker, R. 1975. The attaining and maintaining of preparation. Pages 33-49 in P. M. A. Rabbitt and S. Dornic (Eds.), Attention and Performance, Vol. 5. London, Academic Press.
Gutierrez, A., M. Gonzalez-Gross, M. Delgado, and M. J. Castillo. 2001. Three days fast in sportsmen decrease physical work capacity but not strength or perception-reaction time. International Journal of Sport Nutrition and Exercise Metabolism 11(4): 420.
Hick, W. E. 1952. On the rate of gain of information. Quaterly Journal of Experimental Psychology 4: 11-26.
Hsieh, S. 2002. Tasking shifting in dual-task settings. Perceptual and Motor Skills 94(2): 407.
Hultsch, D. F., S. W. MacDonald and R. A. Dixon. 2002. Variability in reaction time performance of younger and older adults. The Journals of Gerontology, Series B 57(2): 101.
Jevas, S. and J. H. Yan. 2001. The effect of aging on cognitive function: a preliminary quantitative review. Research Quarterly for Exercise and Sport 72: A-49.
Johanson, A. M. 1922. The influence of incentive and punishment upon reaction-time. Archives of Psychology, No. 54.Kashihara, K. and Y. Nakahara. 2005. Short-term effect of physical exercise at lactate threshold on choice reaction time. Perceptual and Motor Skills 100(2): 275-281.
Kleemeier, R. W., T. A. Rich, and W. A. Justiss. 1956. The effects of alpha-(2-piperidyl) benzhydrol hydrochloride (Meratran) on psychomotor performance in a group of aged males. Journal of Gerontology 11: 165-170.
Kohfeld, D. L. 1971. Simple reaction time as a function of stimulus intensity in decibels of light and sound. Journal of Experimental Psychology 88: 251-257.
Kroll, W. 1973. Effects of local muscular fatigue due to isotonic and isometric exercise upon fractionated reaction time components. Journal of Motor Behavior 5: 81-93.
Lajoie, Y. and S. P. Gallagher. 2004. Predicting falls within the
elderly community: comparison of postural sway, reaction time, the Berg
balance scale and the Activities-specific Balance Confidence (ABC)
scale for comparing fallers and non-fallers. Archives of Gerontology and Geriatrics
Laming, D. R. J. 1968. Information Theory of Choice-Reaction Times. Academic Press, London.
Lee, J. D., B. Caven, S. Haake, and T. L. Brown. 2001. Speech-based interaction with in-vehicle computers: The effect of speech-based e-mail on drivers' attention to the roadway. Human Factors 43(4): 631.
Lemmink, K. and C. Visscher. 2005. Effect of intermittent exercise
on multiple-choice reaction times of soccer players. Perceptual and Motor Skills 100(1):
Lenzenweger, M. F. 2001. Reaction time slowing during high-load,
task performance in relation to psychometrically identified schizotypy.
of Abnormal Psychology 110: 290.
Liguori, A. and J. H. Robinson. 2001. Caffeine anatagonism of
alcohol-induced driving impairment. Drug
and Alcohol Dependence 63(2): 123-129.
Linder, G. N. 2001. The effect of caffeine consumption on reaction
time. Bulletin of the South Carolina
Academy of Science, Annual 2001: 42.
Lorist, M. M. and J. Snel. 1997. Caffeine effects on perceptual and
motor processes. Electroencephalography
and Clinical Neurophysiology 102(5): 401-414.
Levitt, S. and B. Gutin. 1971. Multiple choice reaction time and movement time during physical exertion. Research Quarterly 42: 405-410.
Luce, R. D. 1986. Response Times: Their Role in Inferring Elementary Mental Organization. Oxford University Press, New York.
Luchies, C. W., J. Schiffman, L. G. Richards, M. R. Thompson, D. Bazuin, and A. J. DeYoung. 2002. Effects of age, step direction, and reaction condition on the ability to step quickly. The Journals of Gerontology, Series A 57(4): M246.
Marshall, W. H., S. A. Talbot, and H. W. Ades. 1943. Cortical response of the anaesthesized cat to gross photic and electrical afferent stimulation. Journal of Nerophysiology 6: 1-15.
McLellan, T. M., G. H. Kamimori, D. G. Bell, I. F. Smith, D.
Johnson, and G. Belenky. 2005.Caffeine maintains vigilance and
marksmanship in simulated urban operations with sleep deprivation. Aviation, Space, and Environmental Medicine
McMorris, T., J. Sproule, S. Draper, and R. Child. 2000. Performance
of a psychomotor skill following rest, exercise at the plasma
epinephrine threshold and maximal intensity exersie. Perceptual and Motor Skills 91(2):
Miller, J. O. and K. Low. 2001. Motor processes in simple, go/no-go, and choice reaction time tasks: a psychophysiological analysis. Journal of Experimental Psychology: Human Perception and Performance 27: 266.
Nettelbeck, T. 1973. Individual differences in noise and associated perceptual indices of performance. Perception 2: 11-21.
Nettelbeck, T. 1980. Factors affecting reaction time: Mental retardation, brain damage, and other psychopathologies. In A. T. Welford (Ed.), Reaction Times. Academic Press, New York, pp. 355-401.
Nickerson, R. S. 1972. Binary-classification reaction times: A review of some studies of human information-processing capabilities. Psychonomic Monograph Supplements 4: 275-318.
Noble, C. E., B. L. Baker, and T. A. Jones. 1964. Age and sex parameters in psychomotor learning. Perceptual and Motor Skills 19: 935-945.
Panayiotou, G. and S. R. Vrana. 2004. The role of self-focus, task
difficulty, task self-relevance, and evaluation anxiety in reaction
time performance. Motivation and
Emotion 28(2): 171-196.
Peters, M. and J. Ivanoff. 1999. Performance asymmetries in computer
mouse control of right-handers, and left handers with left- and
right-handed mouse experience. Journal
of Motor Behavior 31(1): 86-94.
Philip, P., J. Taillard, P. Sagaspe, C. Valtat, M. Sanchez-Ortuno,
N. Moore, A. Charles, and B. Bioulac. 2004. Age, performance, and sleep
deprivation. Journal of Sleep
Research 13(2): 105-110.
Piéron, H. 1920. Nouvelles recherches sur l'analyse du temps de latence sensorielle et sur la loi qui relie ce temps a l'intensité de l'excitation. Année Psychologique 22: 58-142.
Redfern, M. S., M. Muller, J. R. Jennings, J. M. Furman. 2002. Attentional dynamics in postural control during perturbations in young and older adults. The Journals of Gerontology, Series A 57(8): B298.
Richard, C. M., R. D. Wright, C. Ee, S. L. Prime, U. Shimizu, and J. Vavrik. 2002. Effect of a concurrent auditory task on visual search performance in a driving-related image-flicker task. Human Factors44(2): 108.
Robinson, E. S. 1934. Work of the integrated organism. In C. Murchison (Ed.), Handbook of General Experimental Psychology, Clark University Press, Worcester, MA.
Robinson, M. C. and M. Tamir. 2005. Neuroticism as mental noise: a
relation between neuroticism and reaction time standard deviations. Journal of Personality and Social
Psychology 89(1): 107-115.
Rogers, M. W., M. E. Johnson, K. M. Martinez, M-L Mille, and L. D. Hedman. 2003. Step training improves the speed of voluntary step initiation in aging. The Journals of Gerontology, Series A 58(1): 46-52.
Rose, S. A., J. F. Feldman, J. J. Jankowski, and D. M. Caro. 2002. A longitudinal study of visual expectation and reaction time in the first year of life. Child Development 73(1): 47.
Sanders, A. F. 1998. Elements of Human Performance: Reaction Processes and Attention in Human Skill. Lawrence Erlbaum Associates, Publishers, Mahwah, New Jersey. 575 pages.
Schweitzer, K. 2001. Preattentive processing and cognitive ability.
29 i2: p. 169.
Singleton, W. T. 1953. Deterioration of performance on a short-term perceptual-motor task. In W. F. Floyd and A. T. Welford (Eds.), Symposium on Fatigue. H. K. Lewis and Co., London, pp. 163-172.
Sjoberg, H. 1975. Relations between heart rate, reaction speed, and subjective effort at different work loads on a bicycle ergometer. Journal of Human Stress 1: 21-27.
Smith, A., C. Brice, A. Leach, M. Tilley, and S. Williamson. 2004.
Effects of upper respiratory tract illnesses in a working population. Ergonomics 47(4): 363-369.
Sternberg, S. 1969. Memory scanning: Mental processes revealed by reaction time experiments. American Scientist 57: 421-457.
Surwillo, W. W. 1973. Choice reaction time and speed of information processing in old age. Perceptual and Motor Skills 36: 321-322.
Szinnai, G. H. Schachinger, M. J. Arnaud, L. Linder, and U. Keller.
2005. Effect of water deprivation on cognitive-motor performance in
healthy men and women. The American
Journal of Physiology 289(1): R275-280.
Takahashi, M., A. Nakata, T. Haratani, Y. Ogawa, and H. Arito. 2004.
Post-lunch nap as a worksite intervention to promote alertness on the
job. Ergonomics 47(9)
Teichner, W. H. and M. J. Krebs. 1974. Laws of visual choice reaction time. Psychological Review 81: 75-98.
Weiss, A. D. 1965. The locus of reaction time change with set, motivation, and age. Journal of Gerontology 20: 60-64.
Welford, A. T. 1968. Fundamentals of Skill. Methuen, London.
Welford, A. T. 1977. Motor performance. In J. E. Birren and K. W. Schaie (Eds.), Handbook of the Psychology of Aging. Van Nostrand Reinhold, New York, pp. 450-496.
Welford, A. T. 1980. Choice reaction time: Basic concepts. In A. T. Welford (Ed.), Reaction Times. Academic Press, New York, pp. 73-128.
Wells, G. R. 1913. The influence of stimulus duration on RT. Psychological Monographs 15: 1066.
Woodworth, R. S. and H. Schlosberg. 1954. Experimental Psychology. Henry Holt, New York.
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