We aimed to discover how varying the length of task breaks would affect the time-on-task effect in subsequent testing periods.
Background:
An important means of preventing errors and accidents caused by mental fatigue and time on task is to intersperse rest intervals within long work periods. Most studies of rest pauses to date have examined their effects in real-world tasks and settings, and their subtler effects on behavior, as measurable by laboratory paradigms, are not well understood.
Method:
We studied a group of 71 participants as they completed a 1-hr auditory oddball task with two rest opportunities. Rest intervals were 1, 5, or 10 min long.
Results:
Improvements in reaction time were significantly positively associated with length of the rest break. However, longer breaks were also associated with steeper decrements in performance in the subsequent task block. Across individuals, the amount of immediate improvement correlated with the extent of later decline.
Conclusion:
Our results support a resource/effort-allocation model of fatigue, whereby longer breaks bias participants toward greater effort expenditure on resumption of the task when cognitive resources may not have been fully replenished.
Application:
These findings may have implications for the refinement of work-rest schedules in industries where time-on-task degradation in performance is an important concern.
ArigaA.LlerasA. (2011). Brief and rare mental “breaks” keep you focused: Deactivation and reactivation of task goals preempt vigilance decrements. Cognition, 118, 439–443.
2.
BakerK.OlsonJ.MorisseauD. (1994). Work practices, fatigue and nuclear power plant safety performance. Human Factors, 36, 244–257.
3.
BergumB. O.LehrD. J. (1963). Vigilance performance as a function of task and environmental variables. Washington, DC: George Washington University, Human Resources Research Office.
4.
BhatiaN.MurrellK. F. (1969). An industrial experiment in organized rest pauses. Human Factors, 11, 167–174.
5.
BoucseinW.ThumM. (1997). Design of work/rest schedules for computer work based on psychophysiological recovery measures. International Journal of Industrial Ergonomics, 20, 51–57.
6.
ColquhounW. P. (2007). The effect of a short rest-pause on inspection efficiency. Ergonomics, 2, 367–372.
7.
DababnehA. J.SwansonN.ShellR. L. (2001). Impact of added rest breaks on the productivity and well being of workers. Ergonomics, 44, 164–174.
8.
DorrianJ.RogersN. L.DingesD. F. (2005). Psychomotor vigilance performance: Neurocognitive assay sensitive to sleep loss. In KushidaC. (Ed.), Sleep deprivation: Clinical issues, pharmacology and sleep loss effects (pp. 39–70). New York, NY: Marcel Dekker.
9.
DroryA. (1985). Effects of rest and secondary task on simulated truck-driving task performance. Human Factors, 27, 201–207.
10.
GiambraL. M.QuilterR. E. (1987). A two-term exponential functional description of the time course of sustained attention. Human Factors, 29, 635–643.
11.
HeltonW. S. (2004). Validation of a short stress state questionnaire. In Proceedings of the Human Factors and Ergonomics Society 48th Annual Meeting (pp. 1238–1242). Santa Monica, CA: Human Factors and Ergonomics Society.
12.
HeltonW. S.NaswallK. (2015). Short Stress State Questionnaire: Factor structure and state change assessment. European Journal of Psychological Assessment, 31, 20–30.
13.
HeltonW. S.RussellP. N. (2011). Working memory load and the vigilance decrement. Experimental Brain Research, 212, 429–437.
14.
HeltonW. S.RussellP. N. (2012). Brief mental breaks and content-free cuesmaynot keep you focused. Experimental Brain Research, 219, 37–46.
15.
HenningR. A.SauterS. L.SalvendyG.KriegE. F.Jr. (1989). Microbreak length, performance and stress in a data entry task. Ergonomics, 32, 855–864.
16.
HockeyG. R. (1997). Compensatory control in the regulation of human performance under stress and high workload: A cognitive-energetical framework. Biological Psychology, 45, 73–93.
17.
HolmS. (1979). A simple sequentially rejective multiple test procedure. Scandinavian Journal of Statistics, 6, 65–70.
18.
JanaroR. E.BechtoldS. E. (1985). A study of the reduction of fatigue impact on productivity through optimal rest break scheduling. Human Factors, 27, 459–466.
19.
KahnemanD. (1973). Attention and effort. Englewood Cliffs, NJ: Prentice Hall.
20.
KoikeK. J.HurstM. K.WetmoreS. J. (1994). Correlation between the American Academy of Otolaryngology-Head and Neck Surgery five-minute hearing test and standard audiologic data. Otolaryngology–Head and Neck Surgery, 111, 625–632.
21.
KurzbanR.DuckworthA.KableJ. W.MyersJ. (2013). An opportunity cost model of subjective effort and task performance. Behavioral and Brain Sciences, 36, 661–726.
22.
LangnerR.EickhoffS. B. (2013). Sustaining attention to simple tasks: A meta-analytic review of the neural mechanisms of vigilant attention. Psychological Bulletin, 139, 870–900.
23.
LimJ.QuevencoF. C.KwokK. (2013). EEG alpha activity is associated with individual differences in post-break improvement. NeuroImage, 76, 81–89.
24.
LisperH. O.ErikssonB. (1980). Effects of the length of a rest break and food intake on subsidiary reaction-time performance in an 8-hour driving task. Journal of Applied Psychology, 65, 117–122.
25.
MackworthJ. F. (1964). Performance decrement in vigilance, threshold, and high-speed perceptual motor tasks. Canadian Journal of Psychology, 18, 209–223.
26.
ManlyT.RobertsonI. H.GallowayM.HawkinsK. (1999). The absent mind: Further investigations of sustained attention to response. Neuropsychologia, 37, 661–670.
27.
MatthewsG.CampbellS. E.FalconerS.JoynerL. A.HugginsJ.GilliandK.GrierR.WarmJ. S. (2002). Fundamental dimensions of subjective state in performance settings: Task engagment, distress, and worry. Emotion, 2, 315–340.
28.
MatthewsG.SzalmaJ.PanganibanA. R.NeubauerC.WarmJ. S. (2013). Profiling task stress with the Dundee Stress State Questionnaire. In CavalcantiL.AzevedoS. (Eds.), Psychology of stress: New research (pp. 49–91). Hauppage, NY: Nova Science.
29.
McCormackP. D. (1958). Performance in a vigilance task as a function of inter-stimulus interval and interpolated rest. Canadian Journal of Psychology, 12, 242–246.
30.
ParasuramanR. (1979). Memory load and event rate control sensitivity decrements in sustained attention. Science, 205, 924–927.
31.
ParasuramanR.JiangY. (2012). Individual differences in cognition, affect, and performance: Behavioral, neuroimaging, and molecular genetic approaches. NeuroImage, 59, 70–82.
32.
Phipps-NelsonJ.RedmanJ. R.RajaratnamS. M. W. (2011). Temporal profile of prolonged, night-time driving performance: Breaks from driving temporarily reduce time-on-task fatigue but not sleepiness. Journal of Sleep Research, 20, 404–415.
33.
RossH. A.RussellP. N.HeltonW. S. (2014). Effects of breaks and goal switches on the vigilance decrement. Experimental Brain Research, 232, 1729–1737.
34.
SandersA. F. (1997). A summary of resource theories from a behavioral perspective. Biological Psychology, 45, 5–18.
35.
SmallwoodJ.SchoolerJ. W. (2006). The restless mind. Psychological Bulletin, 132, 946–958.
36.
TuckerP. (2003). The impact of rest breaks upon accident risk, fatigue and performance: A review. Work & Stress, 17, 123–137.
37.
TuckerP.FolkardS.MacdonaldI. (2003). Rest breaks and accident risk. Lancet, 361, 680.
38.
WarmJ. S.ParasuramanR.MatthewsG. (2008). Vigilance requires hard mental work and is stressful. Human Factors, 50, 433–441.
39.
WestB. T.WelchK. B.GaleckiA. T. (2015). Linear mixed models: A practical guide using statistical software (2nd ed.). Boca Raton, FL: Taylor & Francis Group.
40.
WilliamsonA.LombardiD. A.FolkardS.StuttsJ.CourtneyT. K.ConnorJ. L. (2011). The link between fatigue and safety. Accident Analysis & Prevention, 43, 498–515.
