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Operant animal welfare: productive approaches and persistent difficulties

Published online by Cambridge University Press:  11 January 2023

EG Patterson-Kane ,
M Pittman  and
EA Pajor
EG Patterson-Kane
Affiliation:
Animal Welfare and Behavior, Department of Animal Sciences, Purdue University, Poultry Science Building, 125 S Russell Street, West Lafayette, IN 47907-2042, USA
M Pittman
Affiliation:
Animal Welfare and Behavior, Department of Animal Sciences, Purdue University, Poultry Science Building, 125 S Russell Street, West Lafayette, IN 47907-2042, USA
EA Pajor*
Affiliation:
Animal Welfare and Behavior, Department of Animal Sciences, Purdue University, Poultry Science Building, 125 S Russell Street, West Lafayette, IN 47907-2042, USA
*
* Contact for correspondence and requests for reprints: [email protected]
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Abstract

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Operant procedures occupy a prominent role within animal welfare science because they provide information about the strength of animals’ preferences. It is assumed that strongly motivated choices commonly indicate conditions necessary for uncompromised welfare. A review of the literature shows that members of many species will work for access to resources not commonly provided to them; including a secure resting place (perches for hens or boxes for rodents) and substrates for species-typical activities such as nesting, digging and rooting (in hens, rats, mice and pigs). Despite a recent surge in popularity, operant techniques remain under-utilised and studies employing them struggle to find the best method for prioritising resources. In order to fully exploit the potential of operant procedures a wider appreciation of the relevant theories and techniques might be beneficial; including greater employment of the basic principles of reinforcement theory and further development of more complex economic analogies. If these two strands of research develop together, operant approaches have a key role to play in refining and replacing husbandry practices that undermine animal welfare.

Keywords

animal welfareeconomic demandenvironmental enrichmentoperant conditioningreinforcementreview
Type
Articles
Information
Animal Welfare , Volume 17 , Issue 2 , May 2008 , pp. 139 - 148
Copyright
© 2008 Universities Federation for Animal Welfare

References

Abraham, S, Baker, R, Denton, DA, Kraintz, F, Kraitz, L and Purser, L 1973 Components in the regulation of salt balance: salt appetite studied by operant behavior. Ajebak 51: 65–81Google Scholar
Albentosa, MJ and Cooper, JJ 2005 Testing resource value in group-housed animals: An investigation of cage height preference in laying hens. Behavioural Processes 70: 113–121CrossRefGoogle ScholarPubMed
Anliker, J and Mayer, J 1956 An Operant Conditioning Technique for Studying Feeding-Fasting Patterns in Normal and Obese Mice. Journal of Applied Physiology 8: 667–670CrossRefGoogle ScholarPubMed
Baldwin, BA 1972 Operant conditioning techniques for the study of thermoregulatory behavior in sheep. Journal of Physiology 226: 41–42Google Scholar
Baldwin, BA and Meese, GB 1977 Sensory reinforcement and illumination preference in the domesticated pig. Animal Behaviour 25: 497–507CrossRefGoogle Scholar
Baldwin, BA and Start, IB 1981 Sensory Reinforcement and Illumination Preference in Sheep and Calves. Proceedings of the Royal Society of London. Series B, Biological Sciences: 5 13–526Google Scholar
Barnes, GW and Baron, A 1961 Stimulus complexity and sensory reinforcement. Journal of Comparative and Physiological Psychology 54: 466–469CrossRefGoogle ScholarPubMed
Bauman, R 1991 An experimental analysis of the cost of food in a closed economy. Journal of the Experimental Analysis of Behavior 56: 33–50CrossRefGoogle Scholar
Beck, J 1971 Instrumental conditioned reflexes with sexual reinforcement in rats. Acta Neurobiologia Experientia 31:25 1–262Google Scholar
Belke, TW 1997 Running and responding reinforced by the opportunity to run: effect of reinforcement duration. Journal of the Experimental Analysis of Behavior 67: 337–35 1CrossRefGoogle Scholar
Bell, FR and Sly, J 1976 The assessment of sodium appetite in calves using operant conditioning procedures. Journal of Physiology 263: 178–179Google ScholarPubMed
Bell, FR and Sly, J 1979 The metabolic effects of sodium depletion in calves on salt appetite assessed by operant methods. Journal of Physiology 295: 43 I -443CrossRefGoogle ScholarPubMed
Brambell, FWR 1965 Report of the Technical Committee to Enquire into the Welfare of Animals Kept Under Intensive Livestock Husbandry Systems. Her Majesty's Stationery Office: London, UKGoogle Scholar
Brown, PL and Jenkins, HM 1968 Autoshaping of the pigeons key-peck. Journal of the Experimental Analysis of Behavior 11: 1–8CrossRefGoogle ScholarPubMed
Bokkers, EAM, Koene, P, Rodenburg, B, Zimmerman, PH and Spruit, BM 2004 Working for food under conditions of varying motivation in broilers. Animal Behaviour 68: 105–1 13CrossRefGoogle Scholar
Bubier, NE 1996 The behavioural priorities of laying hens: the effect of cost/no cost multi-choice tests on time budgets. Behavioral Processes 37: 225–238CrossRefGoogle ScholarPubMed
Budgell, P 1971 Behavioural thermoregulation in the barbery dove, Streptophelia risoria. Animal Behaviour 19: 524–53 1Google Scholar
Cammaerts, MC 2004 Operant conditioning in the ant, Myrmica sabuleti. Behavioural Processes 67: 417–425CrossRefGoogle ScholarPubMed
Clifton, PG 1979 Patterson of feeding in the domestic chick II. An Operant Situation. Animal Behaviour 27: 821 -828CrossRefGoogle Scholar
Cook, DG and Carew, TJ 1986 Operant Conditioning of Head Waving in Aplysia. Proceedings of the National Academy of Sciences of the United States of America 83: I 120-1 124Google ScholarPubMed
Collier, G and Levitsky, DA 1968 Operant running as a function of deprivation and effort. Journal of Comparative and Physiological Psychology 66: 522–523CrossRefGoogle ScholarPubMed
Collier, G and Hirsch, E 1971 Reinforcing properties of spontaneous activity in the rat. Journal of Comparative and Physiological Psychology 7: 155–160CrossRefGoogle Scholar
Cooper, JJ and Appleby, MC 1997 Motivational aspects of individual variation in response to nest boxes by laying hens. Animal Behaviour 54: 1245–1253CrossRefGoogle Scholar
Cooper, JJ and Mason, GJ 2000 Increasing costs of access to resources cause re-scheduling of behavior in American mink, Mustela vison: implications for the assessment of behavioural priorities. Applied Animal Behaviour Science 66: 135–151CrossRefGoogle Scholar
Cooper, JJ and Mason, GJ 2001 The use of operant technology to measure behavioral priorities in captive animals. Behavior Research Methods: Instruments & Computers 33: 427–434Google ScholarPubMed
Dawkins, M 1977 Do hens suffer in battery cages? Environmental preferences and welfare. Animal Behaviour 25: 1034–1046CrossRefGoogle Scholar
Dawkins, MS 1983 Battery hens name their price: consumer demand theory and the measurement of ethological ‘needs’. Animal Behaviour 31: 351 -364CrossRefGoogle Scholar
Dawkins, MS 1986 Consumer demand theory and the assessment of animal welfare: a reply to Lawrence. Animal Behaviour 35: 295CrossRefGoogle Scholar
Dawkins, MS and Beardsley, T 1986 Reinforcing properties of access to litter in hens. Applied Animal Behaviour Science 15: 351 -364CrossRefGoogle Scholar
Dettmer, E and Fragaszy, D 2000 Determining the Value of Social Companionship to Captive Tufted Capuchin Monkeys, Cebus apella. Animal Technology and Welfare 3: 293–304Google Scholar
Duncan, IJH 1981 Animal rights, animal welfare: a scientist's assessment. Poultry Science 60: 489–499CrossRefGoogle Scholar
Duncan, IJH and Kite, VG 1987 Some investigations into motivation in the domestic fowl. Applied Animal Behaviour Science 18: 387–388CrossRefGoogle Scholar
Duncan, IJH 1998 Behavior and behavioral needs. Poultry Science 77: 1766–1722CrossRefGoogle ScholarPubMed
Duncan, IJH 2005 Science based assessment of animal welfare: farm animals. Scientific and Technical Review 24: 283–492Google ScholarPubMed
Duncan, IJH 2006a Investigating the Feelings of Agricultural Animals. The Humane Care and Use of Agricultural Animals in Research Two Day Conference. The Scientists Center for Animal Welfare/The Federation of Animal Science Societies. 22-23 May 2006, St Louis, MO, USAGoogle Scholar
Duncan, IJH 2006b The changing concept of animal sentience. Applied Animal Behavior Science 100: 11–19CrossRefGoogle Scholar
Fantino, E and Cole, M 1968 Sand-digging in mice: functional autonomy? Psychonomic Science 10: 29–30CrossRefGoogle Scholar
Faure, JM and Lagadic, H 1994 Elasticity of demand for food and sand in laying hens subjected to variable wind speed. Applied Animal Behaviour Science 42: 49–59CrossRefGoogle Scholar
Foltin, RW 1991 An economic analysis of “demand” for food in baboons. Journal of the Experimental Analysis of Behavior 56: 445–454CrossRefGoogle ScholarPubMed
Franco, J, Johnstone, ADF and Mackie, AM 1991 Studies of bait preference in the cod, Gadus morhua L: characterization of feeding stimulants using an operant conditioning technique. Fisheries Research 10: 229–242CrossRefGoogle Scholar
Gilbertson, DW 1975 Courtship as a reinforcement for key pecking in the pigeon Columbia livia. Animal Behaviour 23: 735–744CrossRefGoogle Scholar
Gunnarsson, S, Matthews, LR, Foster, TM and Temple, W 2000 The demand for straw and feather as litter substrates by laying hens. Applied Animal Behaviour Science 65: 321 -330CrossRefGoogle Scholar
Hansen, SW, Jensen, MB, Pedersen, LJ, Munksgaard, L, Ladewig, J and Matthews, L 2002 The type of operant response affects the slope of the demand curve for food in Mink. Applied Animal Behaviour Science 76: 327–338CrossRefGoogle Scholar
Hansen, SW and Jensen, MB 2005 Quantitative evaluation of the motivation to access a running wheel or a water bath in farm mink. Applied Animal Behaviour Science 98: 127–144CrossRefGoogle Scholar
Haskell, MJ, Hutson, GD, Dickenson, LG and Palmer, S 1997 The pre-farrowing behaviour of sows with operant access to space for locomotion. Applied Animal Behaviour Science 51:5 1–58CrossRefGoogle Scholar
Herrero, MJ, Pascual, M, Madrid, JA and Sanchez-Vazquez, FJ 2005 Demand-feeding rhythms and feeding-entrainment of locomotor activity rhythms in tench, Tinca tinca. Physiology & Behavior 84: 595–605CrossRefGoogle ScholarPubMed
Hogan, JA 1967 Fighting and reinforcement in Siamese fighting fish, Betta splendens. Journal of Comparative and Physiological Psychology 64: 356–359CrossRefGoogle ScholarPubMed
Hogan, JA, Kleist, JA, Kleist, S and Hutchings, CSL 1970 Display and food as reinforcers in the Siamese fighting fish (Betta splendens). Journal of Comparative and Physiological Psychology 70: 351–357CrossRefGoogle Scholar
Holm, L, Jensen, MB and Jeppesen, LL 2002 Calves’ motivation for access to two different types of social contact measured by operant conditioning. Applied Animal Behaviour Science 79: 175–194CrossRefGoogle Scholar
Horowitz, KA, Scott, NR, Hillman, PE and van Tienhoven, A 1978 Effects of feathers on instrumental thermoregulatory behavior in chickens. Physiology and Behavior 21: 233–238CrossRefGoogle ScholarPubMed
Houston, AI 1997 Demand curves and welfare. Animal Behaviour 53: 983–990CrossRefGoogle Scholar
Hovland, AL, Mason, G, Boe, KE, Steinheim, G and Bakken, M 2006 Evaluation of the ‘maximum price paid’ as an index of motivational strength for farmed silver foxes, Vulpes vulpes. Applied Animal Behaviour Science 100: 258–279CrossRefGoogle Scholar
Hughes, BO and Black, AJ 1973 The preference of domestic hens for different types of battery cage floor. British Poultry Science 14: 615–619CrossRefGoogle Scholar
Hughes, BO 1980 The assessment of behavioural needs. In: Moss, R (ed) The Laying Hen and its Environment pp 149–159. Martinus Nijhoff Publishers: Boston, USACrossRefGoogle Scholar
Hurnik, JF 1993 Ethics and animal agriculture. The Journal of Agricultural Ethics 6(51): 21–35Google Scholar
Hursh, SR 1980 Economic concepts for the analysis of behavior. The Journal of the Experimental Analysis of Behavior 34: 219–238CrossRefGoogle ScholarPubMed
Hutson, GD and Haskell, MJ 1990 The Behaviour of farrowing sows with free and operant access to an earth floor. Applied Animal Behaviour Science 26: 363–372CrossRefGoogle Scholar
Hutt, PJ 1954 Rate of bar pressing as a function of quality and quantity of food reward. Journal of Comparative and Physiological Psychology 47: 235–239CrossRefGoogle ScholarPubMed
Iversen, IH 1993 Techniques for establishing schedules with wheel running as reinforcement in rats. Journal of the Experimental Analysis of Behavior 60: 219–238CrossRefGoogle ScholarPubMed
Iversen, IH 1998 Simple and conditional visual discrimination and wheel running reinforcement in rats. Journal of the Experimental Analysis of Behavior 70: 105–121CrossRefGoogle ScholarPubMed
Jensen, P 1993 Nest building in domestic sows: the role of external stimuli. Animal Behavior 45: 351 -358CrossRefGoogle Scholar
Jensen, MB, Munksgaard, L, Pedersen, LJ, Ladewig, J and Matthews, L 2004 Prior deprivation and reward duration attest the demand function for rest in dairy heifers. Applied Animal Behaviour Science 88: 1–1 1CrossRefGoogle Scholar
Jensen, MB, Tuomisto, L and Pedersen, LJ 2004 Locomotor behaviour in dairy calves, the use of demand functions to assess the effect of deprivation. Applied Animal Behaviour Science 86: 3–14CrossRefGoogle Scholar
Jensen, MB, Pedersen, LJ and Munksgaard, L 2005 The effect of reward duration on demand functions for rest in dairy heifers and lying requirements as measured by demand functions. Applied Animal Behaviour Science 90: 207–217CrossRefGoogle Scholar
Jezierski, T, Scheffler, N, Werner, B and Schumacher, E 2005 Demand functions for cage size in rabbits selectively bred for high and low activity in open-field. Applied Animal Behaviour Science 93: 323–339CrossRefGoogle Scholar
Jones, R and Nicol, CJ 1998 A note on the effect of control of the thermal environment on the well-being of growing pigs. Applied Animal Behaviour Science 60: I -9CrossRefGoogle Scholar
Keverne, EB 1976 Sexual receptivity and attractiveness in the female rhesus monkey. Advances in the Study of Behavior 7: 155–200CrossRefGoogle Scholar
Kimble, GA 1989 Psychology from the standpoint of a generalist. American Psychologist 44: 491 -499CrossRefGoogle Scholar
King, JA and Weisman, RG 1964 Sand digging contingent upon bar pressing in deermice, Peromyscus. Animal Behaviour 12: 446–450CrossRefGoogle Scholar
King, LA 2003 Behavioral evaluation of the psychological welfare and environmental requirements of agricultural research animals’ theory, measurement, ethics, and practical implications. ILAR Journal 44(3): 211–221CrossRefGoogle ScholarPubMed
Kirkden, RD, Edwards, JSS and Broom, DM 2003 A theoretical comparison of the consumer surplus and the elasticities of demand as measures of motivational strength. Animal Behaviour 65: 157–178CrossRefGoogle Scholar
Kirkden, RD and Pajor, EA 2006 Using preference, motivation and aversion tests to ask scientific questions about animals’ feelings. Applied Animal Behaviour Science 100: 29–47CrossRefGoogle Scholar
Koene, P and Duncan, IJH 2001 From environmental requirement to environmental enrichment: from animal suffering to animal pleasure. The Proceedings of the Fifth International Conference on Environmental Enrichment. 4-9 November 2001, Sydney, AustraliaGoogle Scholar
Lagadic, H and Faure, J-M 1987 Preferences of domestic hens for cage size and floor types as measured by operant conditioning. Applied Animal Behavior Science 19: 147–155CrossRefGoogle Scholar
Lawrence, AB, Appleby, MC, Illius, AW and McLeod, HA 1989 Measuring hunger in the pig using operant conditioning: the effect of dietary bulk. Animal Production 48: 213–220CrossRefGoogle Scholar
Lawrence, AB and Illius, AW 1989 Methodology for measuring hunger and food needs using operant conditioning in the pig. Applied Animal Behaviour Science 24: 273–285CrossRefGoogle Scholar
Lea, SEG 1978 The psychology and economics of demand. Psychological Bulletin 85: 441–466CrossRefGoogle Scholar
Leslie, TK, Dalton, L and Phillips, CJC 2004 Preference of domestic rabbits for grass or coarse mix feeds. Animal Welfare 13: 57–62Google Scholar
Lindberg, AC and Nicol, CJ 1994 An evaluation of the effect of operant feeders on welfare of hens maintained on litter. Applied Animal Behavior Science 3: 211–227CrossRefGoogle Scholar
Mandler, G 1996 The situation of psychology: landmarks and choice points. The American Journal of Psychology 109: 1–35CrossRefGoogle Scholar
Manser, CE, Broom, DM, Overend, P and Morris, TH 1998 Operant studies to determine the strength of preference in laboratory rats for nest-boxes and nesting materials. Laboratory Animals 32: 36–41CrossRefGoogle ScholarPubMed
Markowitz, H 1978 Engineering environments for behavioral opportunities in the zoo. The Behavior Analyst 1: 34–47CrossRefGoogle ScholarPubMed
Markowitz, H 1982 Behavioral Enrichment in the Zoo. van Nostrand Reinhold: New York, USAGoogle Scholar
Mason, G, Cooper, J and Clarebrough, C 2001 Frustrations of fur-farmed mink. Nature 410: 35–36CrossRefGoogle ScholarPubMed
Matthews, TJ 1971 Thermal motivation in the rat. Journal of Comparative and Physiological Psychology 2: 173–176Google Scholar
Matthews, LR, Temple, W, Foster, TM and McAdies, TM 1993 Quantifying the environmental requirements of layer hens by behavioural demand functions. In: Nichelmann M, Wieranga HK and Braun HK (eds) Proceedings of the International Congress on Applied Ethology pp 206-209, Berlin, GermanyGoogle Scholar
Matthews, LR and Ladewig, J 1994 Environmental requirements of pigs measured by behavioural demand functions. Animal Behaviour 47: 713–719CrossRefGoogle Scholar
Matthews, TJ, Grigore, M, Tang, L, Doat, M, Kow, L-M and Pfaff, DW 1997 Sexual reinforcement in the female rat. Journal of the Experimental Analysis of Behavior 68: 399–410CrossRefGoogle ScholarPubMed
Mench, JA and Stricklin, WR 1990 Consumer demand theory and social behavior: all chickens are not equal. Behavioral and Brain Sciences 13: 28CrossRefGoogle Scholar
Myers, RD and Mesker, DC 1960 Operant responding in a horse under several schedules of reinforcement. Journal of the Experimental Analysis of Behavior 3: 161–164CrossRefGoogle Scholar
Michael, RP and Keverene, EB 1968 Pheromones in the communication of sexual status in primates. Acta Physiologica Scandinavica 389: I -80Google Scholar
Moore, CL, Whittlestone, WG, Mullord, M, Priest, PN, Kilgour, R and Albright, JL 1974 Behavior responses of dairy cows trained to activate a feeding device. Journal of Dairy Science 58: 1531–1535CrossRefGoogle Scholar
Morrison, WD and McMillan, I 1985 Operant control of the thermal environment by chicks. Poultry Science 64: 1656–1660CrossRefGoogle Scholar
Morrison, WD, McMillan, I, Bate, LA, Otten, L and Pei, DCT 1986 Behavioral observations and operant procedure using microwaves as a heat source for young chicks. Poultry Science 65: 1516–1521CrossRefGoogle ScholarPubMed
Morrison, WD, Bate, LA, Amyot, E and McMillan, I 1987a Performance of large groups of chicks using operant conditioning to control the thermal environment. Poultry Science 66: 1758–1761CrossRefGoogle ScholarPubMed
Morrison, WD, McMillan, I and Amyot, E 1987b Operant control of the thermal environment and learning time of young chicks and piglets. Canadian Journal of Animal Science 67: 343–347CrossRefGoogle Scholar
Morrison, WD, McMillan, I and Bate, LA 1987c Effect of air movement on operant heat demand of chicks. Poultry Science 66: 854–857CrossRefGoogle ScholarPubMed
Nelson, K, Patterson-Kane, EG and Love, J 2003 Using preference to develop enriched caging for rats. Animal Technology and Welfare 2: 85–88Google Scholar
Oley, NN and Slotnick, BM 1970 Nesting material as a reinforcer for operant behavior in the rat. Psychonomic Science 21: 41–43CrossRefGoogle Scholar
Olsson, IAS and Keeling, LJ 2002 The push-door for measuring motivation in hens: laying hens are motivated to perch at night. Animal Welfare 11: 11–19Google Scholar
Osborne, SR 1977 The free food contra-freeloading phenomenon: A review and analysis. Animal Learning and Behavior 5: 221 -235CrossRefGoogle Scholar
Patterson-Kane, EG, Harper, D and Hunt, M 2001 Cage preference of laboratory rats. Laboratory Animals 35: 74–79CrossRefGoogle ScholarPubMed
Patterson-Kane, EG, Hunt, M and Harper, D 2002 Rats demand social contact. Animal Welfare I 1: 327–332Google Scholar
Patterson-Kane, EG, Hunt, M and Harper, D 2004 Rats demand for group size. Journal of Applied Animal Welfare Science 7: 267–272CrossRefGoogle ScholarPubMed
Pedersen, LJ, Jensen, MB, Hansen, SW, Munksgaard, L, Ladewig, J and Matthews, L 2002 Social isolation affects the motivation to work for food and straw in pigs as measured by operant conditioning techniques. Applied Animal Behaviour Science 77: 295–309CrossRefGoogle Scholar
Pedersen, LJ, Holm, L, Jensen, MB and Jorgensen, E 2005 The strength of pigs’ preferences for different rooting material measured using concurrent schedules of reinforcement. Applied Animal Behaviour Science 94: 31–48CrossRefGoogle Scholar
Petherick, JC and Rutter, SM 1990 Quantifying motivation using a computer-controlled push-door. Applied Animal Behaviour Science 27: 159–167CrossRefGoogle Scholar
Pfaus, JG, Kippin, TE and Centeno, S 2001 Conditioning and sexual behavior: a review. Hormones and Behavior 40: 291 -321CrossRefGoogle ScholarPubMed
Prescott, NB and Wathes, CM 2002 Preference and motivation of laying hens to eat under different illuminances and the effect of illuminance on eating behaviour. British Poultry Science 43: 190–195CrossRefGoogle ScholarPubMed
Rhodes, JS, Gammie, SC and Garland, T 2005 Neurobiology of mice selected for high voluntary wheel-running activity. Integrative and Comparative Biology 45: 438–455CrossRefGoogle ScholarPubMed
Robins, RW, Gosling, SD and Craik, KH 1999 An empirical analysis of trends in psychology. American Psychologist 54: I 17–128CrossRefGoogle ScholarPubMed
Robert, S, Rushen, J and Farmer, C 1997 Both energy and bulk of food effect stereotypic behaviour, Heart rate and feeding motivation of female pigs. Applied Animal Behaviour Science 54: 161–171CrossRefGoogle Scholar
Roper, TJ 1973 Nesting material as a reinforcer for female mice. Animal Behavior 21: 733–740CrossRefGoogle Scholar
Roper, TJ 1975 Nest material and food as reinforcers for fixed-ratio responding in mice. Learning and Motivation 6: 327–343CrossRefGoogle Scholar
Sanchez-Vazquez, FJ, Yamamoto, T, Akiyama, T, Madrid, JA and Tabata, M 1998 Selection of macronutrients by goldfish operating self-feeders. Physiology & Behavior 65: 21 1–218CrossRefGoogle ScholarPubMed
Schmidt, I and Rautenburg, W 1975 Instrumental thermoregulatory behaviour of the pigeon. Journal of Comparative Physiology 101: 225–235CrossRefGoogle Scholar
Sevenster, P 1973 Incompatibility of response and reward. In: Hinde, RA and Stevenson-Hinde, J (eds) Constraints on Learning: Limitations and Predispositions pp 265–283. Academic Press: London, UKGoogle Scholar
Sherwin, CM and Nicol, CJ 1995 Changes in meal patterning by mice measure the cost imposed by natural obstacles. Applied Animal Behaviour Science 43: 291 -300CrossRefGoogle Scholar
Sherwin, CM and Nicol, CJ 1997 Behavioural demand functions of caged laboratory mice for additional space. Animal Behavior 53: 67–74CrossRefGoogle Scholar
Sherwin, CM 1998 The use and perceived importance of three resources which provide caged laboratory mice the opportunity for extended locomotion. Applied Animal Behavior Science 55: 353–367CrossRefGoogle Scholar
Sherwin, CM 2003 Social context affects the motivation of laboratory mice, Mus musculus, to gain access to resources. Animal Behaviour 66: 649–655CrossRefGoogle Scholar
Sherwin, CM 2004 The motivation of group-housed laboratory mice, Mus musculus, for additional space. Animal Behaviour 67: 711–717CrossRefGoogle Scholar
Sherwin, CM, Haug, E, Terkelsen, N and Vadgama, M 2004 Studies on the motivation for burrowing by laboratory mice. Applied Animal Behavior Science 88: 343–358CrossRefGoogle Scholar
Sorensen, DB, Ladewig, J and Lawson, LG 2001 The influence of strain on demand functions for water in rats, Rattus Norvegicus. Scandinavian Journal of Laboratory Animal Science 1: 1–9Google Scholar
Thorndike, EL 1911 Animal Intelligence. Macmillan: New York, USAGoogle Scholar
van de Weerd, HA, van Loo, PLP, van Zutphen, LFM, Koolhaas, JM and Baumans, V 1998 Strength of preference for nesting material as environmental enrichment for laboratory mice. Applied Animal Behaviour Science 55: 369–382CrossRefGoogle Scholar
Warburton, HJ and Nicol, CJ 2001 The relationship between behavioural priorities and animal welfare: a test using the laboratory mouse, Mus musculus. Acta Agricultura Scandinavica 30: 124–1300CrossRefGoogle Scholar
Wemelsfelder, F 1997 Life in captivity: its lack of opportunities for variable behaviour. Applied Animal Behavior Science 54: 67–70CrossRefGoogle Scholar
Widowski, TM and Duncan, IJH 2000 Working for a dustbath: are hens increasing pleasure rather than reducing suffering? Applied Animal Behaviour Science 68: 39–53CrossRefGoogle ScholarPubMed
Zajonc, RB 1971 Brainwash: familiarity breeds comfort. Psychology Today 3: 60–64Google Scholar