Why Do Dolphins Smile? A Comparative Perspective on Dolphin Emotions and Emotional Expressions

  • Stan A. KuczajIIEmail author
  • Lauren E. Highfill
  • Radhika N. Makecha
  • Holli C. Byerly
Part of the The Science of the Mind book series (The Science of the Mind)


Although emotions have proven difficult to define, they nonetheless influence the lives of humans and non-human animals. Processing emotions is particularly important for members of species with dynamic social lives. For such animals, the ability to recognize and respond to the emotional states of others facilitates successful social interactions. For example, dolphins live in dynamic fission/fusion societies, and it seems likely that dolphins are sensitive to the emotional states of other dolphins. In this chapter, we consider the evidence for emotional states and emotional recognition in dolphins from a comparative perspective. This includes a discussion of methodologies used to study emotions in animals as well as a consideration of the overlap between animal personality research and animal emotion research. We conclude that there are many challenges facing those who study animal emotions, but also believe that a better understanding of animal emotions will increase our understanding of animal behavior and our ability to improve the welfare of wild animals in captivity and domestic animals.


Facial Expression Emotional State Emotional Expression Killer Whale Bottlenose Dolphin 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


  1. Arnold MBB (1960) The nature of emotion. Penguin, HarmondsworthGoogle Scholar
  2. Au WWL (1993) The sonar of dolphins. Springer, New YorkGoogle Scholar
  3. Aureli F, Preston SD, de Waal FBM (1999) Heart rate responses to social interactions in free-moving rhesus macaques (Macaca mulatta): a pilot study. J Comp Psychol 113:59–65PubMedGoogle Scholar
  4. Averill J (1980) A constructionist view of emotion. In: Plutchik R, Kellerman H (eds) Emotion: theory, research and experience. Academic, New York, pp 305–339Google Scholar
  5. Bachorowski JA, Owren MJ (2003) The sounds of emotion: the production and perception of affect-related vocal acoustics. In: Ekman P, Campos JJ, Davidson RJ, de Waal FBM (eds) Emotions inside out: 130 years after Darwin’s the expression of the emotions in man and animals. Ann N Y Acad Sci, New YorkGoogle Scholar
  6. Bain A (1859) The emotions and the will. J. W. Parker and Son, LondonGoogle Scholar
  7. Bastian J (1965) Primate signaling systems and human languages. In: Devore I (ed) Primate behavior: field studies of monkeys and apes. Holt, Rinehart, and Winston, New York, pp 585–606Google Scholar
  8. Bearzi G (2007) A mother bottlenose dolphin mourning her dead newborn calf in the Amvrakikos Gulf, Greece. Retrieved from
  9. Bekoff M (2000) Animal emotions: exploring passionate natures. Bioscience 50:862–870Google Scholar
  10. Bekoff M (2007) The emotional lives of animals. New World Library, NovatoGoogle Scholar
  11. Bell C (1840) The hand, its mechanisms and vital endowments, as evincing design: the Bridgewater Treatises on the power, wisdom, and goodness of God as manifested in the Creation, Treatise IV. Harper and Brothers, New YorkGoogle Scholar
  12. Buss D (2009) How can evolutionary psychology successfully explain personality and individual differences? Perspect Psychol Sci 4:359–366Google Scholar
  13. Byerly HC, Richardson JL, Kuczaj SA II (2011) Context of S-Posture display in bottlenose dolphins (in preparation)Google Scholar
  14. Cacioppo JT, Gardner WL (1999) Emotion. Annu Rev Psychol 50:191–214PubMedGoogle Scholar
  15. Caldwell MC, Caldwell DK (1966) Epimeletic (care-giving) behavior in Cetacea. In: Norris KS (ed) Whales, dolphins and porpoises. University of California Press, Berkeley, pp 755–789Google Scholar
  16. Caldwell MC, Caldwell DK (1967) Interspecific transfer of information via pulsed sound in captive odontocete cetaceans. In: Busnel RG (ed) Animal sonar systems: biology and bionics. Laboratoire de Physiologie Acoustique, Jouy-en-Josas, pp 879–936Google Scholar
  17. Caldwell MC, Caldwell DK (1971) Statistical evidence for individual signature whistles in Pacific white sided dolphins, Lagenorhynchus obliquidens. Cetology 3:1–9Google Scholar
  18. Caldwell DK, Caldwell MC (1977) Cetaceans. In: Sebeok T (ed) How animals communicate. Indiana University Press, Bloomington, pp 794–808Google Scholar
  19. Caldwell MC, Haugen RM, Caldwell DK (1962) High-energy sound associated with fright in the dolphin. Science 137:907–908Google Scholar
  20. Cook M, Sayigh LS, Blum JE, Wells RS (2004) Signature-whistle production in undisturbed free-ranging bottlenose dolphins (Tursiops truncatus). Proc Biol Sci 271:1043–1049PubMedGoogle Scholar
  21. Cornelius RR (1996) The science of emotion: research and tradition in the psychology of emotion. Prentice Hall, Saddle RiverGoogle Scholar
  22. Cremer MJ, Hardt FAS, Tonello AJ Jr (2005) Evidence of epimeletic behavior involving a Pontoporia blainvillei calf. Biotemas 19:83–86Google Scholar
  23. Danbury TC, Weeks CA, Chambers JP, Waterman-Pearson AE, Kestin SC (2000) Self-selection of the analgesic drug Carprofen by lame broiler chickens. Vet Rec 146:307–311PubMedGoogle Scholar
  24. Dantzer R, Mormède P (1981) Can physiological criteria be used to assess welfare in pigs? In: Sybesma W (ed) Current topics in veterinary medicine and animal science, vol 11. Kluwer, Boston/Hingham, pp 53–73Google Scholar
  25. Darwin C (1872) The expression of the emotions in man and animals. Murray, LondonGoogle Scholar
  26. Dawkins MS (1977) Do hens suffer in battery cages? Environmental preferences and welfare. Anim Behav 25:1034–1046Google Scholar
  27. Dawkins MS (2000) Animal minds and animal emotions. Am Zool 40:883–888Google Scholar
  28. Dawkins MS (2006) Through animal eyes: what behavior tells us. Appl Anim Behav Sci 100:4–10Google Scholar
  29. Delfour F, Marten K (2006) Lateralized visual behavior in bottlenose dolphins (Tursiops truncatus) performing audio-visual tasks: the right visual field advantage. Behav Processes 71:41–50PubMedGoogle Scholar
  30. Dixon B (2001) Animal emotions. Ethics Environ 6:22–30Google Scholar
  31. Douglas-Hamilton I, Bhalla S, Wittemyer G, Vollrath F (2006) Behavioural reactions of elephants towards a dying and deceased matriarch. Appl Anim Behav Sci 100:87–102Google Scholar
  32. Dudinski KM, Sakai M, Masaki K, Kogi K, Hishii T, Kurimoto M (2003) Behavioural observations of bottlenose dolphins towards two dead conspecifics. Aquat Mamm 29:108–116Google Scholar
  33. Dudzinski KM (1996) Communication and behavior in the Atlantic spotted dolphin (Stenella frontalis): relationships between vocal and behavioral activities. Dissertation, Texas A & M UniversityGoogle Scholar
  34. Dudzinski KM (1998) Contact behavior and signal exchange in Atlantic spotted dolphins (Stenella frontalis). Aquat Mamm 24:129–142Google Scholar
  35. Dudzinski K, Gregg J, Ribic C, Kuczaj S (2009) A comparison of pectoral fin contact between two different wild dolphin populations. Behav Processes 80:182–190PubMedGoogle Scholar
  36. Dutton DM, Clark RA, Dickins DW (1997) Personality in captive chimpanzees: use of a novel rating procedure. Int J Primatol 18:539–552Google Scholar
  37. Fertl D, Schiro A (1994) Carrying of dead calves by free-ranging Texas bottlenose dolphins (Tursiops truncatus). Aquat Mamm 20:53–56Google Scholar
  38. Fraser D (2009) Animal behaviour, animal welfare, and the scientific study of affect. Appl Anim Behav Sci 118:108–117Google Scholar
  39. Frohoff TG (2004) Stress in dolphins. In: Bekoff M (ed) Encyclopedia of animal behaviour. Greenwood Press, Westport, pp 1158–1164Google Scholar
  40. Goodall J (1986) The chimpanzees of Gombe. Harvard University Press, CambridgeGoogle Scholar
  41. Goodall J (1990) Through a window: my thirty years with the chimpanzees of Gombe. Houghton Mifflin, BostonGoogle Scholar
  42. Gosling SD (1998) Personality dimensions in spotted hyenas (Crocuta crocuta). J Comp Psychol 112:107–118PubMedGoogle Scholar
  43. Gosling SD (2001) From mice to men: what can we learn about personality from animal research? Psychol Bull 127:45–86PubMedGoogle Scholar
  44. Harzen S, Santos MED (1992) Three encounters with wild bottlenose dolphins (Tursiops truncatus) carrying dead calves. Aquat Mamm 18:49–55Google Scholar
  45. Hauser MD (1993) Right hemisphere dominance for the production of facial expression in monkeys. Science 261:475–477PubMedGoogle Scholar
  46. Hebb D (1946) Emotion in man and animal: an analysis of the intuitive processes of recognition. Psychol Rev 53:88–106PubMedGoogle Scholar
  47. Helweg DA, Bauer GB, Herman LM (1992) Observations of an S-shaped posture in humpback whales. Aquat Mamm 18:74–78Google Scholar
  48. Herman LM (2010) What laboratory research has told us about dolphin cognition. Int J Comp Psychol 233:310–330Google Scholar
  49. Hernandez EN, Solangi M, Kuczaj SA II (2010) Time and frequency parameters of bottlenose dolphin whistles as predictors of surface behavior in the Mississippi Sound. J Acoust Soc Am 127:3232–3238PubMedGoogle Scholar
  50. Herzing DL (1996) Underwater behavioral observations and associated vocalizations of free-ranging Atlantic spotted dolphins, Stenella frontalis, and bottlenose dolphins, Tursiops truncatus. Aquat Mamm 22:61–79Google Scholar
  51. Herzing DL (2000) Acoustics and social behavior of wild dolphins: implications for a sound society. In: Au WWL, Popper AN, Fay RR (eds) Hearing in whales and dolphins. Springer, New York, pp 225–272Google Scholar
  52. Highfill LE, Kuczaj SA (2007) Do bottlenose dolphins (Tursiops truncatus) have distinct and stable personalities? Aquat Mamm 33:380–389Google Scholar
  53. Highfill L, Hanbury D, Kristiansen R, Kuczaj S, Watson S (2010) Rating versus coding in animal personality research. Zoo Biol 29:509–516PubMedGoogle Scholar
  54. Horback KM, Friedman WR, Johnson CM (2010) The occurrences and context of s-posture display by captive belugas (Delphinapterus leucas). Int J Comp Psychol 23:689–700Google Scholar
  55. Izard CE (1992) Basic emotions, relations among emotions, and emotion-cognition relations. Psychol Rev 99:561–565PubMedGoogle Scholar
  56. James W (1884) What is emotion? Mind 9:188–205Google Scholar
  57. Jerison HJ (1986) The perceptual worlds of dolphins. In: Schusterman RJ, Thomas JA, Wood FG (eds) Dolphin cognition and behavior: a comparative approach. Erlbaum, Hillsdale, pp 141–166Google Scholar
  58. Johnson CM, Norris KC (1994) Social behavior. In: Norris KS, Würsig B, Wells RS, Würsig M (eds) The Hawaiian spinner dolphin. University of California Press, Berkeley, pp 14–30Google Scholar
  59. Kagan J (2007) What is emotion?: history, measures, and meaning. Yale University Press, New HavenGoogle Scholar
  60. Kaplan JD, Connor R (2007) A preliminary examination of sex differences in tactile interactions among juvenile Atlantic spotted dolphins (Stenella frontalis). Mar Mamm Sci 23:943–953Google Scholar
  61. Kilborn SS (1994) Object carrying in a captive beluga whale (Delphinapterus leucas) as possible surrogate behavior. Mar Mamm Sci 10:496–501Google Scholar
  62. Kilian A, von Fersen L, Güntürkün O (2000) Lateralization of visuospatial processing in the bottlenose dolphin (Tursiops truncatus). Behav Brain Res 116:211–215PubMedGoogle Scholar
  63. Kirkden RD, Pajor EA (2006) Using preference, motivation and aversion tests to ask scientific questions about animals’ feelings. Appl Anim Behav Sci 100:29–47Google Scholar
  64. Kuczaj SA, Kirkpatrick VM (1993) Similarities and differences in human and animal language research: toward a comparative psychology of language. In: Roitblat HL, Herman LM, Nachtigall PE (eds) Language and communication: comparative perspectives. Lawrence Erlbaum Associates, Hillsdale, pp 45–64Google Scholar
  65. Kuczaj SA, Makecha R (2008) The role of play in the evolution and ontogeny of contextually flexible communication. In: Griebel U, Oller K (eds) Evolution of communicative flexibility: complexity, creativity, and adaptability in human and animal communication. MIT Press, Cambridge, pp 253–278Google Scholar
  66. Lancaster J (1965) Primate behavior and the emergence of human culture. Holt, Rinehart and Winston, New YorkGoogle Scholar
  67. Larsen RJ, Fredrickson BL (1999) Measurement issues in emotion research. In: Kahneman D, Diener E, Schwarz N (eds) Well-being: the foundations of hedonic psychology. Russell Sage, New York, pp 40–60Google Scholar
  68. LeDoux J (1996) The emotional brain. The mysterious underpinnings of emotional life. Simon and Schuster, New YorkGoogle Scholar
  69. Lilly J (1963) Distress call of the bottlenose dolphin: stimuli and evoked behavioral responses. Science 139:116–118PubMedGoogle Scholar
  70. Lilly J, Miller A (1961) Vocal exchanges between dolphins. Science 134:1873–1876PubMedGoogle Scholar
  71. Lodi L (1992) Epimeletic behavior of free-ranging rough-toothed dolphins, Steno bredanensis, from Brazil. Mar Mamm Sci 8:284–287Google Scholar
  72. Lorenz K (1949) King Solomon’s ring. Methuen, LondonGoogle Scholar
  73. Luria A (1982) Language and cognition. MIT Press, CambridgeGoogle Scholar
  74. Mann J, Barnett H (1999) Lethal tiger shark (Galeocerdo cuvieri) attack on bottlenose dolphin (Tursiops sp.) calf: defense and reactions by the mother. Mar Mamm Sci 15:568–575Google Scholar
  75. Marler P, Evans CS (1997) Communication signals of animals: contributions of emotion and reference. In: Segerstrale U, Molnar P (eds) Nonverbal communication: where nature meets culture. Lawrence Erlbaum Associates, Mahwah, pp 151–170Google Scholar
  76. McCowan B, Reiss D (1995) Maternal aggressive contact vocalizations in captive bottlenose dolphins (Tursiops truncatus): wide-band, low-frequency signals during mother/aunt-infant interactions. Zoo Biol 14:293–309Google Scholar
  77. McCowan B, Reiss D (2001) The fallacy of ‘signature whistles’ in bottlenose dolphins: a comparative perspective of ‘signature information’ in animal vocalizations. Anim Behav 62:1151–1162Google Scholar
  78. Miksis JL, Grund MD, Nowacek DP, Solow AR, Connor RC, Tyack RC (2001) Cardiac responses to acoustic playback experiments in the captive bottlenose dolphin (Tursiops truncatus). J Comp Psychol 115:227–232PubMedGoogle Scholar
  79. Moberg GP, Anderson CO, Underwood TR (1980) Ontogeny of the adrenal and behavioral responses of lambs to emotional stress. J Anim Sci 51:138–142PubMedGoogle Scholar
  80. Mukhametov L, Supin A, Polyakova I (1977) Interhemispheric asymmetry of the electroencephalographic sleep patterns in dolphins. Brain Res 134:581–584PubMedGoogle Scholar
  81. Myers RE (1976) Comparative neurology of vocalization and speech: proof of a dichotomy. Ann N Y Acad Sci 280:745–757PubMedGoogle Scholar
  82. Overstrom NA (1983) Association between burst-pulse sounds and aggressive behaviour in captive Atlantic bottlenosed dolphins (Tursiops truncatus). Zoo Biol 2:93–103Google Scholar
  83. Owren MJ, Bachorowski J (2007) Measuring emotion-related vocal acoustics. In: Coan JA, Allen JJ (eds) Handbook of emotional elicitation and assessment. Oxford University Press, New York, pp 239–266Google Scholar
  84. Palacios DM, Day D (1995) A Risso’s dolphin (Grampus griseus) carrying a dead calf. Mar Mamm Sci 11:593–594Google Scholar
  85. Panksepp J (1998) Affective neuroscience. Oxford University Press, New YorkGoogle Scholar
  86. Panksepp J (2003) At the interface between the affective, behavioral, and cognitive neurosciences: decoding the emotional feelings of the brain. Brain Cogn 52:4–14PubMedGoogle Scholar
  87. Panksepp J (2007) Neurologizing the psychology of affects: how appraisal-based constructivism and basic emotion theory can coexist. Perspect Psychol Sci 2:281–296Google Scholar
  88. Panksepp J, Burgdorf J (2003) “Laughing” rats and the evolutionary antecedents of human joy? Physiol Behav 79:533–547PubMedGoogle Scholar
  89. Parr LA, Gothard KM (2007) Studying emotion in animals. In: Coan JA, Allen JJ (eds) Handbook of emotional elicitation and assessment. Oxford University Press, New York, pp 379–397Google Scholar
  90. Parr LA, Waller BM, Fugate J (2005) Emotional communication in primates: implications for neurobiology. Curr Opin Neurobiol 15:716–720PubMedGoogle Scholar
  91. Paul ES, Harding EJ, Mendl M (2005) Measuring emotional processes in animals: the utility of a cognitive approach. Neurosci Biobehav Rev 29:469–491PubMedGoogle Scholar
  92. Paulos R, Dudzinski K, Kuczaj SA II (2008) The role of touch in select social interactions of Atlantic spotted dolphin (Stenella frontalis) and Indo-Pacific bottlenose dolphin (Tursiops aduncus). J Ethol 26:153–164Google Scholar
  93. Pinel J (2009) Biopsychology, 7th edn. Pearson Educational, BostonGoogle Scholar
  94. Plutchik R (2001) The nature of emotions. Am Scientist 89:344Google Scholar
  95. Preuschoff S, van Hooff JARAM (1997) The social function of “smile” and “laughter”: variations across primate species and societies. In: Segerstrale U, Molnar P (eds) Nonverbal communication: where nature meets culture. Lawrence Erlbaum Associates, Mahwah, pp 171–190Google Scholar
  96. Puppe B, Schön PC, Tuchscherer A, Manteuffel G (2005) Castration-induced vocalization in domestic piglets, Sus scrofa: complex and specific alterations of the vocal quality. Appl Anim Behav Sci 95:67–78Google Scholar
  97. Quaranta A, Siniscalchi M, Vallortigara G (2007) Asymmetric tail-wagging responses by dogs to different emotive stimuli. Curr Biol 20:R199–R201Google Scholar
  98. Reefmann N, Kaszàs FB, Wechsler B, Gygax L (2009) Ear and tail postures as indicators of emotional valence in sheep. Appl Anim Behav Sci 118:199–207Google Scholar
  99. Reeve J (2009) Understanding motivation and emotion. Wiley, HobokenGoogle Scholar
  100. Rehn N, Filatova OA, Durban JW, Foote AD (2010) Cross-cultural and cross-ecotype production of a killer whale “excitement” call suggests universality. Naturwissenschafte. doi: 10.1007/s00114-010-0732-5
  101. Ridgway S, Carder D, Finneran J, Keogh M, Kamolnick T, Todd M, Goldblatt A (2006) Dolphin continuous auditory vigilance for five days. J Exp Biol 209:3621–3628PubMedGoogle Scholar
  102. Ridley M (1998) The origins of virtue: human instincts and the evolution of cooperation. Penguin, New YorkGoogle Scholar
  103. Ritter F (2007) Behavioural responses of rough-toothed dolphins to a dead newborn calf. Mar Mamm Sci 23:429–433Google Scholar
  104. Romanes GJ (1881) Animal intelligence. Kegan Paul, LondonGoogle Scholar
  105. Rowell TE, Hinde RA (1962) Vocal communication by the rhesus monkey (Macaca mulatta). Proc Zool Soc Lond 138:279–294Google Scholar
  106. Ruys KI, Stapel DA (2008) The secret life of emotions. Psychol Sci 19:385–391PubMedGoogle Scholar
  107. Sakai M, Hishii T, Takeda S, Kohshima S (2006) Laterality of flipper rubbing behaviour in wild bottlenose dolphins (Tursiops aduncus): caused by asymmetry of eye use? Behav Brain Res 170:204–210PubMedGoogle Scholar
  108. Samuels A (1996) A systematic approach to measuring the social behavior of bottlenose dolphins. Dissertation, Woods Hole Oceanographic InstitutionGoogle Scholar
  109. Sandem AI, Braastad BO, Bøe KE (2002) Eye white may indicate emotional state on a frustration-contentedness axis in dairy cows. Appl Anim Behav Sci 79:1–10Google Scholar
  110. Siebert ER, Parr LA (2003) A structural and contextual analysis of chimpanzee screams. Ann N Y Acad Sci 1000:104–109PubMedGoogle Scholar
  111. Skinner BF (1938) The behavior of organisms: an experimental analysis. D. Appleton-Century Company, New YorkGoogle Scholar
  112. Smolker R, Mann J, Smuts B (1993) Use of signature whistles during separations and reunions by wild bottlenose dolphin mothers and infants. Behav Ecol Sociobiol 33:393–402Google Scholar
  113. Suomi SJ (1997) Nonverbal communication in nonhuman primates: implications for the emergence of culture. In: Segerstrale U, Molnar P (eds) Nonverbal communication: where nature meets culture. Lawrence Erlbaum Associates, Mahwah, NJ, pp 131–150.Google Scholar
  114. Svartberg K, Forkman B (2002) Personality traits in the domestic dog (Canis familiaris). Appl Anim Behav Sci 79:133–155PubMedGoogle Scholar
  115. Takamatsu H, Noda A, Kurumaji A, Murakami Y, Tatsumi M, Ichise R, Nishimura S (2003) A PET study following treatment with a pharmacological stressor, FG7142, in conscious rhesus monkeys. Brain Res 980:275–280PubMedGoogle Scholar
  116. Talan J (2006) Do animals have feelings? Scientific American Mind 17:26–29Google Scholar
  117. Tamaki N, Tadamichi M, Michihiro T (2006) Does body contact contribute towards repairing relationships?: the association between flipper-rubbing and aggressive behavior in captive bottlenose dolphins. Behav Processes 73:209–215PubMedGoogle Scholar
  118. Thieltges H, Lemasson A, Kuczaj SA II, Böye M, Blois-Heulin C (2011) Visual laterality in dolphins when looking at (un)familiar humans. Anim Cogn 14(2):303–308PubMedGoogle Scholar
  119. Tinbergen N (1951) The study of instinct. Clarendon, OxfordGoogle Scholar
  120. Tolman EC (1932) Purposive behaviors in animals and men. Century, New YorkGoogle Scholar
  121. Tyack P (1986) Whistle repertoires of two bottlenosed dolphins, Tursiops truncatus: mimicry of signature whistles? Behav Ecol Sociobiol 18:251–257Google Scholar
  122. Tyack P (2000) Functional aspects of cetacean communication. In: Mann J, Connor RC, Tyack PL, Whitehead H (eds) Cetacean societies: field studies of dolphins and whales. University of Chicago Press, Chicago, pp 270–307Google Scholar
  123. Vazire S, Gosling SD (2004) Personality and temperament: a comparative perspective. In: Bekoff M (ed) Encyclopedia of animal behavior. Greenwood Publishing Group, Westport, pp 818–822Google Scholar
  124. Warren-Smith AB, Dunn WL (2006) Epimeletic behaviour toward a seriously injured juvenile bottlenose dolphin (Tursiops sp.) in Port Phillip, Victoria, Australia. Aquat Mamm 32:357–362Google Scholar
  125. Washburn MF (1908) The animal mind: a textbook of comparative psychology. MacMillan, New YorkGoogle Scholar
  126. Watson JB (1914) Behavior: an introduction to comparative psychology. Holt, New YorkGoogle Scholar
  127. Wolf M, van Doorn GS, Leimar O, Weissing FJ (2007) Life-history trade-offs favour the evolution of animal personalities. Nature 447:581–584PubMedGoogle Scholar
  128. Würsing B (2000) In a party mood. In: Bekoff M (ed) The smile of a dolphin. Discovery Books, New York, pp 188–191Google Scholar
  129. Young PT (1943) Emotion in man and animal. Wiley, New YorkGoogle Scholar

Copyright information

© Springer Japan 2012

Authors and Affiliations

  • Stan A. KuczajII
    • 1
    Email author
  • Lauren E. Highfill
    • 2
  • Radhika N. Makecha
    • 3
  • Holli C. Byerly
    • 4
  1. 1.Department of PsychologyThe University of Southern MississippiHattiesburgUSA
  2. 2.Eckerd CollegeSt. PetersburgUSA
  3. 3.The College of the BahamasNassauThe Bahamas
  4. 4.Dolphins PlusKey LargoUSA

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