Following an initial act of self-control, human performance on subsequent tasks that also require self-control exertion is impaired. This phenomenon, termed ego depletion, is constrained by beliefs and perceptions in humans. Interestingly, this effect has also been observed in dogs, which arguably do not share similar belief systems. This observation suggests that a common biological mechanism might underlie the phenomenon for both species. It also suggests that we can learn something about human self-control by conducting research with dogs. In this article, we relate findings on the depletion effect in dogs to the different mechanisms that are proposed to explain the effect in humans. Finally, we elaborate on practical implications for working dogs.
KurzbanR.DuckworthA.KableJ. W.MyersJ. (2013). (See References). Proposes a motivational model to explain the depletion effect, explaining the potential role of dopamine in more detail than the current article.
2.
MillerH. C.PattisonK. F.DeWallC. N.Rayburn-ReevesR.ZentallT. R. (2010). (See References). The first article that reported the phenomenon of ego depletion in dogs, demonstrating that dogs persisted less after a stay task compared to a caged control condition.
3.
MillerH. C.PattisonK. F.LaudeJ. R.ZentallT. R. (2015). (See References). A recent article investigating the effects of the administration of glucose and fructose after initial self-control exertion in dogs.
4.
MuravenM.BaumeisterR. F. (2000). (See References). Explains the resource model of ego depletion, in which glucose is proposed as the limited resource, in more detail than the current article.
5.
WrightH. F.MillsD. S.PolluxP. M. J. (2012). (See References). A study that investigated impulsivity in dogs, using owner reports and behavioral tests, and correlated impulsivity with urinary metabolites of dopamine and serotonin.
6.
BaumeisterR. F.BratslavskyE.MuravenM.TiceD. M. (1998). Ego depletion: Is the active self a limited resource?Journal of Personality and Social Psychology, 74, 1252–1265. doi:10.1037/0022-3514.74.5.1252
7.
BaumeisterR. F.VohsK. D. (2016). Strength model of self-regulation as limited resource: Assessment, controversies, update. In OlsonJ. M.ZannaM. P. (Eds.), Advances in experimental social psychology (pp. 67–127). New York, NY: Academic Press. doi:10.1016/bs.aesp.2016.04.001
8.
BoyleN. B.LawtonC. L.AllenR.CrodenF.SmithK.DyeL. (2016). No effects of ingesting or rinsing sucrose on depleted self-control performance. Physiology & Behavior, 154, 151–160. doi:10.1016/j.physbeh.2015.11.019
9.
CarterE. C.KoflerL. M.ForsterD. E.McculloughM. E. (2015). A series of meta-analytic tests of the depletion effect: Self-control does not seem to rely on a limited resource. Journal of Experimental Psychology: General, 144, 796–815. doi:10.1037/xge0000083
10.
ChambersE. S.BridgeM. W.JonesD. A. (2009). Carbohydrate sensing in the human mouth: Effects on exercise performance and brain activity. The Journal of Physiology, 587, 1779–1794. doi:10.1113/jphysiol.2008.164285
11.
ConnollyE. J.BeaverK. M. (2014). Examining the genetic and environmental influences on self-control and delinquency: Results from a genetically informative analysis of sibling pairs. Journal of Interpersonal Violence, 29, 707–735. doi:10.1177/0886260513505209
12.
CookP. F.SpivakM.BernsG. (2016). Neurobehavioral evidence for individual differences in canine cognitive control: An awake fMRI study. Animal Cognition, 19, 867–878. doi:10.1007/s10071-016-0983-4
13.
DorrA. E.DebonnelG. (2006). Effect of vagus nerve stimulation on serotonergic and noradrenergic transmission. The Journal of Pharmacology and Experimental Therapeutics, 318, 890–898. doi:10.1124/jpet.106.104166
14.
EvansD. R.BoggeroI. A.SegerstromS. C. (2015). The nature of self-regulatory fatigue and “ego depletion”: Lessons from physical fatigue. Personality and Social Psychology Review. Advance online publication. doi:10.1177/1088868315597841
15.
GailliotM. T. (2015). Energy and psychology. Global Journal for Research Analysis, 4(7), 253–255. doi:10.15373/22778160/July2015/131
16.
HaggerM. S.ChatzisarantisN. L. D.AlbertsH.AnggonoC. O.BirtA.BrandR.. . . CannonT. (2016). A multilab preregistered replication of the ego-depletion effect. Perspectives on Psychological Science, 11, 546–573.
17.
HaggerM. S.WoodC.StiffC.ChatzisarantisN. L. D. (2010). Ego depletion and the strength model of self-control: A meta-analysis. Psychological Bulletin, 136, 495–525. doi:10.1037/a0019486
18.
InzlichtM.SchmeichelB. J. (2012). What is ego depletion? Toward a mechanistic revision of the resource model of self-control. Perspectives on Psychological Science, 7, 450–463. doi:10.1177/1745691612454134
19.
JobV.DweckC. S.WaltonG. M. (2010). Ego depletion—Is it all in your head? Implicit theories about willpower affect self-regulation. Psychological Science, 21, 1686–1693. doi:10.1177/0956797610384745
20.
KokB. E.CoffeyK. A.CohnM. A.CatalinoL. I.VacharkulksemsukT.AlgoeS. B.. . . FredricksonB. L. (2013). How positive emotions build physical health: Perceived positive social connections account for the upward spiral between positive emotions and vagal tone. Psychological Science, 24, 1123–1132. doi:10.1177/0956797612470827
21.
KuhneF.HößlerJ. C.StruweR. (2014). Emotions in dogs being petted by a familiar or unfamiliar person: Validating behavioural indicators of emotional states using heart rate variability. Applied Animal Behaviour Science, 161, 113–120. doi:10.1016/j.applanim.2014.09.020
22.
KurzbanR. (2010). Does the brain consume additional glucose during self-control tasks?Evolutionary Psychology, 8, 244–259. doi:10.1177/147470491000800208
23.
KurzbanR.DuckworthA.KableJ. W.MyersJ. (2013). An opportunity cost model of subjective effort and task performance. Behavioral & Brain Sciences, 36, 661–726. doi:10.1017/S0140525X12003196
24.
MalkuszD. C.BanakosT.MohamedA.VongwattanakitT.MalkuszG.SaeedS.. . . BodnarR. J. (2012). Dopamine signaling in the medial prefrontal cortex and amygdala is required for the acquisition of fructose-conditioned flavor preferences in rats. Behavioural Brain Research, 233, 500–507. doi:10.1016/j.bbr.2012.05.004
25.
Marshall-PesciniS.VirányiZ.RangeF. (2015). The effect of domestication on inhibitory control: Wolves and dogs compared. PLoS ONE, 10(2), e0118469. doi:10.1371/journal.pone.0118469
26.
MartijnC.TenbültP.MerckelbachH.DreezensE.de VriesN. K. (2002). Getting a grip on ourselves: Challenging expectancies about loss of energy after self-control. Social Cognition, 20, 441–460. doi:10.1521/soco.20.6.441.22978
27.
McNayE. C.McCartyR. C.GoldP. E. (2001). Fluctuations in brain glucose concentration during behavioral testing: Dissociations between brain areas and between brain and blood. Neurobiology of Learning and Memory, 75, 325–337. doi:10.1006/nlme.2000.3976
28.
MillerH. C. (2013). The effects of initial self-control exertion and subsequent glucose consumption on search accuracy by dogs. Revista Argentina de Ciencias Del Comportamiento, 5(2), 21–29. Retrieved from http://www.revistas.unc.edu.ar/index.php/racc/article/view/5144
29.
MillerH. C.DeWallC. N.PattisonK.MoletM.ZentallT. R. (2012). Too dog tired to avoid danger: Self-control depletion in canines increases behavioral approach toward an aggressive threat. Psychonomic Bulletin & Review, 19, 535–540. doi:10.3758/s13423-012-0231-0
30.
MillerH. C.PattisonK. F.DeWallC. N.Rayburn-ReevesR.ZentallT. R. (2010). Self-control without a “self”? Common self-control processes in humans and dogs. Psychological Science, 21, 534–538. doi:10.1177/0956797610364968
31.
MillerH. C.PattisonK. F.LaudeJ. R.ZentallT. R. (2015). Self-regulatory depletion in dogs: Insulin release is not necessary for the replenishment of persistence. Behavioural Processes, 110, 22–26. doi:10.1016/j.beproc.2014.09.030
32.
MoldenD. C.HuiC. M.ScholerA. A.MeierB. P.NoreenE. E.D’AgostinoP. R.MartinV. (2012). Motivational versus metabolic effects of carbohydrates on self-control. Psychological Science, 23, 1137–1144. doi:10.1177/0956797612439069
33.
MuravenM. (2010). Building self-control strength: Practicing self-control leads to improved self-control performance. Journal of Experimental Social Psychology, 46, 465–468. doi:10.1016/j.jesp.2009.12.011
34.
MuravenM.BaumeisterR. F. (2000). Self-regulation and depletion of limited resources: Does self-control resemble a muscle?Psychological Bulletin, 126, 247–259. doi:10.1037/0033-2909.126.2.247
35.
MuravenM.TiceD. M.BaumeisterR. F. (1998). Self-control as limited resource: Regulatory depletion patterns. Journal of Personality and Social Psychology, 74, 774–789. doi:10.1037/0022-3514.74.3.774
36.
OdendaalJ. S. J.MeintjesR. A. (2003). Neurophysiological correlates of affiliative behaviour between humans and dogs. Veterinary Journal, 165, 296–301. doi:10.1016/S1090-0233(02)00237-X
37.
OrquinJ. L.KurzbanR. (2016). A meta-analysis of blood glucose effects on human decision making. Psychological Bulletin, 142, 546–567. doi:10.1037/bul0000035
38.
PeremansK.GoethalsI.De VosF.DobbeleirA.HamH.Van BreeH.. . . AudenaertK. (2006). Serotonin transporter and dopamine transporter imaging in the canine brain. Nuclear Medicine and Biology, 33, 907–913. doi:10.1016/j.nucmedbio.2006.07.013
39.
SchmeichelB. J.Harmon-JonesC.Harmon-JonesE. (2010). Exercising self-control increases approach motivation. Journal of Personality and Social Psychology, 99, 162–173. doi:10.1037/a0019797
40.
SegerstromS. C.NesL. S. (2007). Heart rate variability reflects self-regulatory strength, effort, and fatigue. Psychological Science, 18, 275–281. doi:10.1111/j.1467-9280.2007.01888.x
41.
ThayerJ. F.HansenA. L.Saus-RoseE.JohnsenB. H. (2009). Heart rate variability, prefrontal neural function, and cognitive performance: The neurovisceral integration perspective on self-regulation, adaptation, and health. Annals of Behavioral Medicine, 37, 141–153. doi:10.1007/s12160-009-9101-z
42.
TiceD. M.BaumeisterR. F.ShmueliD.MuravenM. (2007). Restoring the self: Positive affect helps improve self-regulation following ego depletion. Journal of Experimental Social Psychology, 43, 379–384. doi:10.1016/j.jesp.2006.05.007
43.
TsurugizawaT.UematsuA.NakamuraE.HasumuraM.HirotaM.KondohT.. . . ToriiK. (2009). Mechanisms of neural response to gastrointestinal nutritive stimuli: The gut-brain axis. Gastroenterology, 137, 262–273. doi:10.1053/j.gastro.2009.02.057
44.
VohsK. D.BaumeisterR. F.SchmeichelB. J. (2013). Motivation, personal beliefs, and limited resources all contribute to self-control. Journal of Experimental Social Psychology, 49, 184–188. doi:10.1016/j.jesp.2012.08.007
45.
WrightH. F.MillsD. S.PolluxP. M. J. (2012). Behavioural and physiological correlates of impulsivity in the domestic dog (Canis familiaris). Physiology & Behavior, 105, 676–682. doi:10.1016/j.physbeh.2011.09.019
