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Is boredom an animal welfare concern?

Published online by Cambridge University Press:  01 January 2023

RK Meagher
RK Meagher*
Affiliation:
School of Agriculture, Policy & Development, University of Reading, Whiteknights, PO Box 237, Reading RG6 6AR, UK; email: [email protected]
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Abstract

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Boredom, while often casually attributed to non-human animals by both laypeople and scientists, has received little empirical study in this context. It is sometimes dismissed by others as anthropomorphic or a trivial concern in comparison to other welfare problems faced in captivity. Recent work on human boredom, however, has led to evidence that, far from being trivial, it can have serious consequences in the form of risky behaviour and reduced physical as well as mental health, and potentially contributes to social problems. Research on mink, supported by older literature on farm and laboratory animals, suggests that monotonous, stimulus-poor environments can induce an increased motivation for diverse stimuli, consistent with the experience of boredom. This experience is likely to be aversive and may lead to problems such as depression-like states or self-injurious behaviour if not addressed. Boredom should therefore be treated as an important welfare concern. Research is needed to find practical ways of identifying this state and to determine how widespread it is across species and which animals are most at risk. Possible ways of alleviating or avoiding this problem include offering animals in our care a choice in the level of stimulation they experience and opportunities to experience appropriate cognitive challenge.

Keywords

animal welfareboredomemotional statesexploratory behaviourindividual differencessensation-seeking
Type
Articles
Information
Animal Welfare , Volume 28 , Issue 1 , February 2019 , pp. 21 - 32
Creative Commons
Creative Common License - CCCreative Common License - BY
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright
© The Author(s), 2023. Published by Cambridge University Press on behalf of The Universities Federation for Animal Welfare

References

Abiona, T, Balogun, J, Adefuye, A and Anguh, I 2015 Understanding HIV risk behaviors in prison: a qualitative study among recently released inmates. International Journal of Prisoner Health 11: 196–208. https://doi.org/10.1108/IJPH-11-2014-0043CrossRefGoogle Scholar
Aho, K 2007 Simmel on acceleration, boredom, and extreme aes-thesia. Journal for the Theory of Social Behaviour 37: 447–462. https://doi.org/10.1111/j.1468-5914.2007.00345.xCrossRefGoogle Scholar
Anderson, B 2004 Time-stilled space-slowed: how boredom matters. Geoforum 35: 739–754. https://doi.org/10.1016/j.geofo-rum.2004.02.005CrossRefGoogle Scholar
Arranz, L, De Castro, NM, Baeza, I, Maté, I, Viveros, MP and De la Fuente, M 2010 Environmental enrichment improves age-related immune system impairment: long-term exposure since adulthood increases life span in mice. Rejuvenation Research 13:415–428. https://doi.org/10.1089/rej.2009.0989CrossRefGoogle ScholarPubMed
Bassett, L and Buchanan-Smith, HM 2007 Effects of pre-dictability on the welfare of captive animals. Applied Animal Behaviour Science 102: 223–245. https://doi.org/10.1016/j.applan-im.2006.05.029CrossRefGoogle Scholar
Bellow, S 1949 The Adventures of Augie March. The Alison Press: London, UKGoogle Scholar
Berardo, LR, Fabio, MC and Pautassi, RM 2016 Post-weaning environmental enrichment, but not chronic maternal isolation, enhanced ethanol intake during periadolescence and early adult-hood. Frontiers in Behavioral Neuroscience 10: 195. https://doi.org/10.3389/fnbeh.2016.00195CrossRefGoogle ScholarPubMed
Berlyne, DE 1960 Conflict, Arousal, and Curiosity. McGraw-Hill: New York, NY, USA. https://doi.org/10.1037/11164-000CrossRefGoogle Scholar
Bexton, WH 1953 Some effects of perceptual limitation in human subjects. McGill University: Montreal, CanadaGoogle Scholar
Bloomfield, LJ and Kennedy, G 2006 Killing time: Excess free time and men's mortality risk. Proceedings from the Time Use and Gender Seminar pp 1–26. Sydney, Australia. Social Policy Research Centre: University of South Wales, AustraliaGoogle Scholar
Bracke, MBM and Spoolder, HAM 2008 Novel object test can detect marginal differences in environmental enrichment in pigs. Applied Animal Behaviour Science 109: 39–48. https://doi.org/10.1016/j.applanim.2007.01.014CrossRefGoogle Scholar
Britt, TW, Sytine, A, Brady, A, Wilkes, R, Pittman, R, Jennings, K and Goguen, K 2017 Enhancing the meaningfulness of work for astronauts on long duration space exploration missions. Aerospace Medicine and Human Performance 88: 779–783. https://doi.org/10.3357/AMHP.4875.2017CrossRefGoogle ScholarPubMed
Britton, A and Shipley, MJ 2010 Bored to death? International Journal of Epidemiology 39: 370–371. https://doi.org/10.1093/ije/dyp404CrossRefGoogle ScholarPubMed
Burghardt, GM 2013 Environmental enrichment and cognitive complexity in reptiles and amphibians: Concepts, review, and implications for captive populations. Applied Animal Behaviour Science 147: 286–298. https://doi.org/10.1016/j.applan-im.2013.04.013CrossRefGoogle Scholar
Burn, CC 2017 Bestial boredom: a biological perspective on ani-mal boredom and suggestions for its scientific investigation. Animal Behaviour 130: 141–151. https://doi.org/10.1016/j.anbe-hav.2017.06.006CrossRefGoogle Scholar
Butler, RA 1953 Discrimination learning by rhesus monkeys to visual-exploration motivation. Journal of Comparative and Physiological Psychology 46: 95–98. https://doi.org/10.1037/h0061616CrossRefGoogle ScholarPubMed
Carrol, EN and Zuckerman, M 1977 Psychopathology and sen-sation seeking in downers, speeders, and trippers - study of relationship between personality and drug choice. International Journal of the Addictions 12: 591–601. https://doi.org/10.3109/10826087709027247CrossRefGoogle Scholar
Chapman, AL, Gratz, KL and Brown, MZ 2006 Solving the puzzle of deliberate self-harm: The experiential avoidance model. Behaviour Research and Therapy 44: 371–394. https://doi.org/10.1016/j.brat.2005.03.005CrossRefGoogle ScholarPubMed
Cladellas, R, Muro, A, Vargas-Guzman, EA, Bastardas, A and Goma-i-Freixanet, M 2017 Sensation seeking and high school performance. Personality and Individual Differences 117: 117–121. https://doi.org/10.1016/j.paid.2017.05.049CrossRefGoogle Scholar
Clark, FE 2013 Marine mammal cognition and captive care: A proposal for cognitive enrichment in zoos and aquariums. Journal of Zoo and Aquarium Research 1: 1–6Google Scholar
Csikszentmihalyi, M 1975 Beyond Boredom and Anxiety. Jossey-Bass Publishers: San Francisco, USAGoogle Scholar
Dallaire, JA, Meagher, RK and Mason, GJ 2012 Individual dif-ferences in stereotypic behaviour predict individual differences in the nature and degree of enrichment use in caged American mink. Applied Animal Behaviour Science 142: 98–108. https://doi.org/10.1016/j.applanim.2012.09.012CrossRefGoogle Scholar
de Carvalho, CR, Pandolfo, P, Pamplona, FA and Takahashi, RN 2010 Environmental enrichment reduces the impact of nov-elty and motivational properties of ethanol in spontaneously hypertensive rats. Behavioural Brain Research 208: 231–236. https://doi.org/10.1016/j.bbr.2009.11.043CrossRefGoogle ScholarPubMed
Drory, A 1982 Individual-differences in boredom proneness and task effectiveness at work. Personnel Psychology 35: 141–151. https://doi.org/10.1111/j.1744-6570.1982.tb02190.xCrossRefGoogle Scholar
Eastwood, JD, Frischen, A, Fenske, MJ and Smilek, D 2012 The unengaged mind. Perspectives on Psychological Science 7: 482–495. https://doi.org/10.1177/1745691612456044CrossRefGoogle ScholarPubMed
Fadel, FR, Driscoll, P, Pilot, M, Wright, H, Zulch, H and Mills, D 2016 Differences in trait impulsivity indicate diversification of dog breeds into working and show lines. Scientific Reports 6:22162. https://doi.org/10.1038/srep22162CrossRefGoogle ScholarPubMed
Fahlman, SA, Mercer-Lynn, KB, Flora, DB and Eastwood, JD 2013 Development and validation of the multidimensional state boredom scale. Assessment 20: 68–85. https://doi.org/10.1177/1073191111421303CrossRefGoogle ScholarPubMed
Farm Animal Welfare Council 2009 Farm Animal Welfare in Great Britain: Past, Present and Future. Farm Animal Welfare Council: London, UKGoogle Scholar
Ferland, JN, Zeeb, FD, Yu, K, Kaur, S, Taves, MD and Winstanley, CA 2014 Greater sensitivity to novelty in rats is associated with increased motor impulsivity following repeated exposure to a stimulating environment: implications for the etiol-ogy of impulse control deficits. European Journal of Neuroscience 40: 3746–3756. https://doi.org/10.1111/ejn.12748CrossRefGoogle Scholar
Frankl, VE 1985 Man's Search for Meaning. Simon and Schuster: New York, NY, USAGoogle Scholar
Franks, B and Higgins, ET 2012 Advances in Experimental Social Psychology. Elsevier: San Diego, USAGoogle Scholar
Frasca, D, Tomaszczyk, J, McFadyen, B and Green, R 2013 Traumatic brain injury and post-acute decline: what role does envi-ronmental enrichment play? A scoping review. Frontiers in Human Neuroscience 7: 31. https://doi.org/10.3389/fnhum.2013.00031CrossRefGoogle Scholar
Fraser, D 1995 Science, values and animal welfare - exploring the inextricable connection. Animal Welfare 4: 103–117CrossRefGoogle Scholar
Fraser, D 1999 Animal ethics and animal welfare science: bridging the two cultures. Applied Animal Behaviour Science 65: 171–189. https://doi.org/10.1016/S0168-1591(99)00090-8CrossRefGoogle Scholar
Garcia, EJ, Haddon, TN, Saucier, DA and Cain, ME 2017 Differential housing and novelty response: Protection and risk from locomotor sensitization. Pharmacology Biochemistry and Behavior 154: 20–30. https://doi.org/10.1016/j.pbb.2017.01.004CrossRefGoogle ScholarPubMed
Gaygisiz, E 2010 Economic and cultural correlates of subjective well-being in countries using data from the Organisation for Economic Co-operation and Development (OECD). Psychological Reports 106: 949–963. https://doi.org/10.2466/pr0.106.3.949-963CrossRefGoogle ScholarPubMed
German, D and Latkin, CA 2012 Boredom, depressive symp-toms, and HIV risk behaviors among urban injection drug users. AIDS and Behavior 16: 2244–2250. https://doi.org/10.1007/s 10461-012-0247-5CrossRefGoogle Scholar
Grimm, JW, Osincup, D, Wells, B, Manaois, M, Fyall, A, Buse, C and Harkness, JH 2008 Environmental enrichment attenuates cue-induced reinstatement of sucrose seeking in rats. Behavioural Pharmacology 19: 777–785. https://doi.org/10.1097/FBP.0b013e32831c3b18CrossRefGoogle ScholarPubMed
Hall, BA, Melfi, V, Burns, A, McGill, DM and Doyle, RE 2018 Curious creatures: a multi-taxa investigation of responses to nov-elty in a zoo environment. PeerJ 6: e4454. https://doi.org/10.7717/peerj.4454CrossRefGoogle Scholar
Harfeld, JL 2013 Telos and the ethics of animal farming. Journal of Agricultural and Environmental Ethics 26: 691–709. https://doi.org/10.1007/s10806-012-9422-yCrossRefGoogle Scholar
Harris, MB 2000 Correlates and characteristics of boredom proneness and boredom. Journal of Applied Social Psychology 30:576–598. https://doi.org/10.1111/j.1559-1816.2000.tb02497.xCrossRefGoogle Scholar
Havermans, RC, Vancleef, L, Kalamatianos, A and Nederkoorn, C 2015 Eating and inflicting pain out of boredom. Appetite 85: 52–57. https://doi.org/10.1016/j.appet.2014.11.007CrossRefGoogle ScholarPubMed
Hayward, A, Tomlinson, A and Neill, JC 2016 Low attentive and high impulsive rats: A translational animal model of ADHD and disorders of attention and impulse control. Pharmacology & Therapeutics 158: 41–51. https://doi.org/10.1016/j.pharmthera.2015.11.010CrossRefGoogle ScholarPubMed
HM Chief Inspector of Prisons 2015 Report on an unannounced inspection of HMP/YOI Stoke Heath. Her Majesty's Inspectorate of Prisons: London, UKGoogle Scholar
Honess, PE and Marin, CM 2006 Behavioural and physiological aspects of stress and aggression in nonhuman primates. Neuroscience and Biobehavioral Reviews 30: 390–412. https://doi.org/10.1016/j.neubiorev.2005.04.003CrossRefGoogle ScholarPubMed
Inglis, IR 1983 Towards a cognitive theory of exploratory behav-iour. In: Archer, J and Birke, LIA (eds) Exploration in Animals and Man pp 72–117. Van Nostrand Reinhold: London, UKGoogle Scholar
Kaba, F, Lewis, A, Glowa-Kollisch, S, Hadler, J, Lee, D, Alper, H, Selling, D, MacDonald, R, Solimo, A, Parsons, A and Venters, H 2014 Solitary confinement and risk of self-harm among jail inmates. American Journal of Public Health 104: 442–447. https://doi.org/10.2105/AJPH.2013.301742CrossRefGoogle ScholarPubMed
Kirkden, RD 2000 Assessing motivational strength and studies of bore-dom and enrichment in pigs. University of Cambridge: Cambridge, UKGoogle Scholar
Kustermans, J and Ringmar, E 2011 Modernity, boredom, and war: a suggestive essay. Review of International Studies 37: 1775–1792. https://doi.org/10.1017/S0260210510001038CrossRefGoogle Scholar
Leong, FTL and Schneller, GR 1993 Boredom proneness: Temperamental and cognitive components. Personality and Individual Differences 14: 233–239. https://doi.org/10.1016/0191-8869(93)90193-7CrossRefGoogle Scholar
Lilley, MK, Kuczaj, SA and Yeater, DB 2017 Individual differ-ences in non-human animals: examining boredom, curiosity, and creativity. In: Vonk, J, Weiss, A and Kuczaj, SA (eds) Personality in Non-human Animals pp 257–276. Springer: Switzerland. https://doi.org/10.1007/978-3-319-59300-5_13CrossRefGoogle Scholar
Litva, A, Robinson, CS and Archer, DC 2010 Exploring lay perceptions of the causes of crib?biting/windsucking behaviour in horses. Equine Veterinary Journal 42: 288–293. https://doi.org/10.1111/j.2042-3306.2009.00025.xCrossRefGoogle ScholarPubMed
Lockard, RB and Haerer, H 1968 Time course of change in light preference resulting from prolonged exposure to adapting stim-uli. Journal of Comparative and Physiological Psychology 65: 529–531. https://doi.org/10.1037/h0025825CrossRefGoogle Scholar
Lovallo, WR 2013 Early life adversity reduces stress reactivity and enhances impulsive behavior: Implications for health behav-iors. International Journal of Psychophysiology 90: 8–16. https://doi.org/10.1016/j.ijpsycho.2012.10.006CrossRefGoogle Scholar
Low, P, Panksepp, J, Reiss, D, Edelman, D, Van Swinderen, B and Koch, C 2012 The Cambridge Declaration on Consciousness. Francis Crick Memorial Conference. 7 July 2012, Cambridge, UKGoogle Scholar
Mackay, PC and Wood-Gush, DGM 1980 The responsiveness of beef calves to novel stimulation: An interaction between explo-ration and fear. Applied Animal Ethology 6: 383–384. https://doi.org/10.1016/0304-3762(80)90141-8CrossRefGoogle Scholar
Malkovsky, E, Merrifield, C, Goldberg, Y and Danckert, J 2012 Exploring the relationship between boredom and sustained attention. Experimental Brain Research 221: 59–67. https://doi.org/10.1007/s00221-012-3147-zCrossRefGoogle ScholarPubMed
Maltsberger, JT, Sakinofsky, I, Jha, A and Maltsberger, JT 2000 Mansur Zaskar: A man almost bored to death. Suicide and Life-Threatening Behavior 30: 83–90CrossRefGoogle Scholar
Mason, G, Burn, CC, Dallaire, JA, Kroshko, J, Kinkaid, HM and Jeschke, JM 2013 Plastic animals in cages: behavioural flexi-bility and responses to captivity. Animal Behaviour 85: 1113–1126. https://doi.org/10.1016/j.anbehav.2013.02.002CrossRefGoogle Scholar
Mason, GJ and Burn, CC 2018 Frustration and boredom in impoverished environments. In: Appleby MC, Olsson IAS and Galindo F (eds) Animal Welfare Third Edition pp 114–138. CABI: Wallingford, UK. https://doi.org/10.1079/9781786390202.0114CrossRefGoogle Scholar
Mather, JA and Anderson, RC 1999 Exploration, play and habituation in octopuses (Octopus dofleini). Journal of Comparative Psychology 113: 333–338. https://doi.org/10.1037/0735-7036.113.3.333CrossRefGoogle Scholar
Mather, JA, Leite, TS and Batista, AT 2012 Individual prey choices of octopuses: Are they generalist or specialist? Current Zoology 58: 597–603. https://doi.org/10.1093/czoolo/58.4.597CrossRefGoogle Scholar
McFarland, D 1989 Problems of Animal Behaviour. Longman: Harlow, UKGoogle Scholar
Meagher, RK, Campbell, DLM and Mason, GJ 2017 Boredom-like states in mink and their behavioural correlates: A replicate study. Applied Animal Behaviour Science 197: 112–119. https://doi.org/10.1016/j.applanim.2017.08.001CrossRefGoogle Scholar
Meagher, RK, Daros, RR, Costa, JHC, von Keyserlingk, MAG, Hötzel, MJ and Weary, DM 2015 Effects of degree and timing of social housing on reversal learning and response to novel objects in dairy calves. PLoS One 10: e0132828. https://doi.org/10.1371/journal.pone.0132828CrossRefGoogle ScholarPubMed
Meagher, RK and Mason, GJ 2012 Environmental enrichment reduces signs of boredom in caged mink. PLoS One 7: e49180. https://doi.org/10.1371/journal.pone.0049180CrossRefGoogle ScholarPubMed
Meehan, CL and Mench, JA 2007 The challenge of challenge: can problem solving opportunities enhance animal welfare? Applied Animal Behaviour Science 102: 246–261. https://doi.org/10.1016/j.applanim.2006.05.031CrossRefGoogle Scholar
Melton, AMA and Schulenberg, SE 2007 On the relationship between meaning in life and boredom proneness: examining a logotherapy postulate. Psychological Reports 101: 1016–1022. https://doi.org/10.2466/pr0.101.4.1016-1022Google ScholarPubMed
Mench, JA 1998 Thirty years after Brambell: Whither animal wel-fare science? Journal of Applied Animal Welfare Science 1: 91–102. https://doi.org/10.1207/s15327604jaws0102_1CrossRefGoogle Scholar
Mendl, M, Burman, OHP and Paul, ES 2010 An integrative and functional framework for the study of animal emotion and mood. Proceedings of the Royal Society B-Biological Sciences 277:2895–2904. https://doi.org/10.1098/rspb.2010.0303CrossRefGoogle Scholar
Mendl, M and Paul, ES 2004 Consciousness, emotion and animal welfare: insights from cognitive science. Animal Welfare 13: S25CrossRefGoogle Scholar
Menich, SR and Baron, A 1984 Social housing of rats: Lifespan effects on reaction time, exploration, weight, and longevity. Experimental Aging Research 10: 95–100. https://doi.org/10.1080/03610738408258550CrossRefGoogle ScholarPubMed
Mercer-Lynn, KB, Bar, RJ and Eastwood, JD 2014 Causes of boredom: The person, the situation, or both? Personality and Individual Differences 56: 122–126. https://doi.org/10.1016/j.paid.2013.08.034CrossRefGoogle Scholar
Mettke-Hofmann, C 2000 Reactions of nomadic and resident parrot species. International Zoo Yearbook 37: 244–256. https://doi.org/10.1111/j.1748-1090.2000.tb00730.xCrossRefGoogle Scholar
Mettke-Hofmann, C 2014 Cognitive ecology: ecological factors, lifestyles, and cognition. Wiley Interdisciplinary Reviews-Cognitive Science 5: 345–360. https://doi.org/10.1002/wcs.1289CrossRefGoogle ScholarPubMed
Michel, G, Carton, S and Jouvent, R 1997 Sensation seeking and anhedonia in risk taking behaviors. Study in bungee jumpers. Encephale-Revue de Psychiatrie Clinique Biologique et Therapeutique 23: 403–411Google Scholar
Mikulas, WL and Vodanovich, SJ 1993 The essence of bore-dom. Psychological Record 43: 3Google Scholar
Miller, R, Bugnyar, T, Poelzl, K and Schwab, C 2015 Differences in exploration behaviour in common ravens and car-rion crows during development and across social context. Behavioral Ecology and Sociobiology 69: 1209–1220. https://doi.org/10.1007/s00265-015-1935-8CrossRefGoogle ScholarPubMed
Morgan, KN and Tromborg, CT 2007 Sources of stress in cap-tivity. Applied Animal Behaviour Science 102: 262–302. https://doi.org/10.1016/j.applanim.2006.05.032CrossRefGoogle Scholar
Nader, J, Claudia, C, El Rawas, R, Favot, L, Jaber, M, Thiriet, N and Solinas, M 2012 Loss of environmental enrichment increases vulnerability to cocaine addiction. Neuropsychopharmacology 37:1579–1587. https://doi.org/10.1038/npp.2012.2CrossRefGoogle ScholarPubMed
Nederkoorn, C, Vancleef, L, Wilkenhöner, A, Claes, L and Havermans, RC 2016 Self-inflicted pain out of boredom. Psychiatry Research 237: 127–132. https://doi.org/10.1016/j.psychres.2016.01.063CrossRefGoogle ScholarPubMed
Ng, AH, Liu, Y, Chen, J and Eastwood, JD 2015 Culture and state boredom: A comparison between European Canadians and Chinese. Personality and Individual Differences 75: 13–18. https://doi.org/10.1016/j.paid.2014.10.052CrossRefGoogle Scholar
Oxford English Dictionary 2017 bore, v.2. Oxford University Press: Oxford, UKGoogle Scholar
Piazza, PV, Deroche, V, Deminiere, JM, Maccari, S, Lemoal, M and Simon, H 1993 Corticosterone in the range of stress-induced levels possesses reinforcing properties - implications for sensation-seeking behaviors. Proceedings of the National Academy of Sciences of the United States of America 90: 11738–11742. https://doi.org/10.1073/pnas.90.24.11738CrossRefGoogle ScholarPubMed
Plutchik, R 2001 The nature of emotions. American Scientist 89:344–350. https://doi.org/10.1511/2001.4.344CrossRefGoogle Scholar
Quinn, JL, Cole, EF, Reed, TE and Morand-Ferron, J 2016 Environmental and genetic determinants of innovativeness in a natural population of birds. Philosophical Transactions of the Royal Society B: Biological Sciences 371: 20150184. https://doi.org/10.1098/rstb.2015.0184CrossRefGoogle Scholar
Raine, A, Reynolds, C, Venables, PH and Mednick, SA 2002 Stimulation seeking and intelligence: A prospective longitudinal study. Journal of Personality and Social Psychology 82: 663–674. https://doi.org/10.1037/0022-3514.82.4.663CrossRefGoogle ScholarPubMed
Reader, SM 2015 Causes of individual differences in animal exploration and search. Topics in Cognitive Science 7: 451–468. https://doi.org/10.1111/tops.12148CrossRefGoogle ScholarPubMed
Ripa, CPL, Hansen, HS, Mortensen, EL, Sanders, SA and Reinisch, JM 2001 A Danish version of the Sensation Seeking Scale and its relation to a broad spectrum of behavioral and psy-chological characteristics. Personality and Individual Differences 30:1371–1386. https://doi.org/10.1016/S0191-8869(00)00119-7CrossRefGoogle Scholar
Romer, D 2010 Adolescent risk taking, impulsivity, and brain development: Implications for prevention. Developmental Psychobiology 52: 263–276. https://doi.org/10.1002/dev.20442CrossRefGoogle ScholarPubMed
Russell, PA 1983 Psychological studies of exploration in animals: a reappraisal. In: Archer, J and Birke, LIA (eds) Exploration in Animals and Humans pp 22–54. Van Nostrand Reinhold: Wokingham, UKGoogle Scholar
Samuels, DJ and Samuels, M 1974 Low self-concept as a cause of drug abuse. Journal of Drug Education 4: 421–438. https://doi.org/10.2190/VJHU-MRAR-NLG6-1XBHCrossRefGoogle Scholar
Schrijver, NCA, Bahr, NI, Weiss, IC and Würbel, H 2002 Dissociable effects of isolation rearing and environmental enrichment on exploration, spatial learning and HPA activity in adult rats. Pharmacology, Biochemistry and Behavior 73: 209–224. https://doi.org/10.1016/S0091-3057(02)00790-6CrossRefGoogle ScholarPubMed
Seneca, LA 1917 Epistle 24. In: Henderson, J (ed) Epistles, Volume I: Epistles pp 1–65. Harvard University Press: London, UKGoogle Scholar
Shaw, SM, Caldwell, LL and Kleiber, DA 1996 Boredom, stress and social control in the daily activities of adolescents. Journal of Leisure Research 28: 274–292. https://doi.org/10.1080/00222216.1996.11949776CrossRefGoogle Scholar
Shulman, EP, Harden, KP, Chein, JM and Steinberg, L 2015 Sex differences in the developmental trajectories of impulse con-trol and sensation-seeking from early adolescence to early adult-hood. Journal of Youth and Adolescence 44: 1–17. https://doi.org/10.1007/s10964-014-0116-9CrossRefGoogle Scholar
Snellgrove, S, Beck, C, Green, A and McSweeney, JC 2013 Resident-to-resident violence triggers in nursing homes. Clinical Nursing Research 22: 461–474. https://doi.org/10.1177/1054773813477128CrossRefGoogle ScholarPubMed
Sommers, J and Vodanovich, SJ 2000 Boredom proneness: Its relationship to psychological- and physical-health symptoms. Journal of Clinical Psychology 56: 149–155. https://doi.org/10.1002/(SICI)1097-4679(200001)56:1<149::AID-JCLP14>3.0.CO;2-Y3.0.CO;2-Y>CrossRefGoogle ScholarPubMed
Špinka, M 2019 Animal agency, animal awareness and animal wel-fare. Animal Welfare 28: 11–20. https://doi.org/10.7120/09627286.28.1.011CrossRefGoogle Scholar
Špinka, M and Wemelsfelder, F 2011 Environmental challenge and animal agency. In: Appleby, MC, Mench, JA, Olsson, IAS and Hughes, BO (eds) Animal Welfare, Second Edition pp 27–44. CAB International: Wallingford, UK. https://doi.org/10.1079/9781845936594.0027CrossRefGoogle Scholar
Sternberg, RJ 2000 Perspectives: Cognition - The Holy Grail of general intelligence. Science 289: 399–401. https://doi.org/10.1126/science.289.5478.399CrossRefGoogle Scholar
Stolba, A and Wood-Gush, DGM 1980 Arousal and exploration in growing-pigs in different environments. Applied Animal Ethology 6:382–383. https://doi.org/10.1016/0304-3762(80)90140-6CrossRefGoogle Scholar
Sundberg, ND, Latkin, CA, Farmer, RF and Saoud, J 1991 Boredom in young adults. Journal of Cross-Cultural Psychology 22:209–223. https://doi.org/10.1177/0022022191222003CrossRefGoogle Scholar
Svendsen, PM, Palme, R and Malmkvist, J 2013 Novelty explo-ration, baseline cortisol level and fur-chewing in farm mink with dif-ferent intensities of stereotypic behaviour. Applied Animal Behaviour Science 147: 172–178. https://doi.org/10.1016/j.applanim.2013.05.011CrossRefGoogle Scholar
Tierney, J 2010 The Trotsky. Alliance Films: CanadaGoogle Scholar
Todman, M 2003 Boredom and psychotic disorders: Cognitive and motivational issues. Psychiatry 66: 146–167. https://doi.org/10.1521/psyc.66.2.146.20623CrossRefGoogle ScholarPubMed
Toledo-Rodriguez, M and Sandi, C 2011 Stress during adoles-cence increases novelty seeking and risk-taking behavior in male and female rats. Frontiers in Behavioral Neuroscience 5: 17. https://doi.org/10.3389/fnbeh.2011.00017CrossRefGoogle ScholarPubMed
Toohey, P 2011 Boredom: A Lively History. Yale University Press: London, UKGoogle Scholar
van der Harst, JE, Baars, AM and Spruijt, BM 2003 Standard housed rats are more sensitive to rewards than enriched housed rats as reflected by their anticipatory behaviour. Behavioural Brain Research 142: 151–156. https://doi.org/10.1016/S0166-4328(02)00403-5CrossRefGoogle ScholarPubMed
van der Staay, FJ, van Zutphen, JA, de Ridder, MM and Nordquist, RE 2017 Effects of environmental enrichment on decision-making behavior in pigs. Applied Animal Behaviour Science 194: 14–23. https://doi.org/10.1016/j.applanim.2017.05.006CrossRefGoogle Scholar
van Horik, J and Emery, NJ 2011 Evolution of cognition. Wiley Interdisciplinary Reviews-Cognitive Science 2: 621–633. https://doi.org/10.1002/wcs.144CrossRefGoogle ScholarPubMed
van Tilburg, WAP and Igou, ER 2017 Boredom begs to differ: differentiation from other negative emotions. Emotion 17: 309–322. https://doi.org/10.1037/emo0000233CrossRefGoogle ScholarPubMed
Webster, J 2005 Animal Welfare: Limping Towards Eden. Blackwell Publishing: Oxford, UK. https://doi.org/10.1002/9780470751107CrossRefGoogle Scholar
Weinstein, L, Xie, X and Cleanthous, CC 1995 Purpose in life, boredom, and volunteerism in a group of retirees. Psychological Reports 76: 482. https://doi.org/10.2466/pr0.1995.76.2.482CrossRefGoogle Scholar
Wemelsfelder, F 2005 Animal boredom: Understanding the tedium of confined lives. In: McMillan, FD (ed) Mental Health and Well-Being in Animals pp 79–92. Blackwell Publishing Ltd: Oxford, UK. https://doi.org/10.1002/9780470384947.ch6CrossRefGoogle Scholar
Wemelsfelder, F and Birke, LIA 1997 Environmental chal-lenge. In: Appleby, MC and Hughes, BO (eds) Animal Welfare pp 35–47. CAB International: Wallingford, UK.Google Scholar
Wilson, TD, Reinhard, DA, Westgate, EC, Gilbert, DT, Ellerbeck, N, Hahn, C, Brown, CL and Shaked, A 2014 Just think: The challenges of the disengaged mind. Science 345: 75–77. https://doi.org/10.1126/science.1250830CrossRefGoogle ScholarPubMed
Wood, M, Daniel, AM, Daniels, E and Papini, MR 2006 Effects of housing on consummatory successive negative contrast in rats: wire-bottom cages versus polycarbonate tubs. Lab Animal 35: 34–38. https://doi.org/10.1038/laban0306-34CrossRefGoogle ScholarPubMed
Wood-Gush, DGM and Beilharz, RG 1983 The enrichment of a bare environment for animals in confined conditions. Applied Animal Ethology 10: 209–217. https://doi.org/10.1016/0304-3762(83)90142-6CrossRefGoogle Scholar
Zakharova, E, Miller, J, Unterwald, E, Wade, D and Izenwasser, S 2009 Social and physical environment alter cocaine conditioned place preference and dopaminergic markers in adolescent male rats. Neuroscience 163: 890–897. https://doi.org/10.1016/j.neuroscience.2009.06.068CrossRefGoogle ScholarPubMed
Zimbardo, PG and Montgomery, KC 1957 Effects of ‘free-environment’ rearing upon exploratory behavior. Psychological Reports 3: 589–594Google Scholar
Zuckerman, M 1971 Dimensions of sensation seeking. Journal of Consulting and Clinical Psychology 36: 45–52. https://doi.org/10.1037/h0030478CrossRefGoogle Scholar
Zuckerman, M and Link, K 1968 Construct validity for the sen-sation-seeking scale. Journal of Consulting and Clinical Psychology 32:420–426. https://doi.org/10.1037/h0026047CrossRefGoogle ScholarPubMed
Þorvaldsdo?ttir, BM 2014 Effect of environmental enrichment on voluntary salt intake in horses. Hólar University College: Hólar, IcelandGoogle Scholar