1. Kring AM, Germans MK, Anhedonia In: Encyclopedia of Psychology. Kazdin AE, editor. New York: Oxford University Press; 2000. pp. 174–175.
2. Earnst KS, Kring AM. Construct validity of negative symptoms: an empirical and conceptual review. Clin Psychol Rev. 1997;17:167–190. [PubMed]
3. Kraepelin E. In: Dementia Praecox and Paraphrenia. Bradley RM, translator. Huntington, NY: Robert E Krieger Publishing Co; ; 1971.
4. Bleuler E. In: Dementia Praecox or the Group of Schizophrenias. Zinkin J, translator. New York: International Universities Press; 1950. 
5. Rado S. Psychoanalysis of Behavior: The Collected Papers of Sandor Rado. Vol 2. New York: Grune and Stratton; 1962.
6. Meehl PE. Schizotaxia, schizotypy, schizophrenia. Am Psychol. 1962;17:827–838.
7. Andreasen NC. Negative symptoms in schizophrenia: definition and reliability. Arch Gen Psychiatry. 1982;39:784–788. [PubMed] 8. Chapman LJ, Chapman JP, Raulin ML. Scales for physical and social anhedonia. J Abnorm Psychol. 1976;85:374–382. [PubMed] 9. Kirkpatrick B, Buchanan RW, McKenney P, Alphs LD, Carpenter WR. The Schedule for the Deficit Syndrome: an instrument for research in schizophrenia. Psychiatry Res. 1989;30:119–123. [PubMed] 10. Kay S, Fiszbein A, Opler L. The Positive and Negative Syndrome Scale (PANSS) for schizophrenia. Schizophr Bull. 1987;13:261–276. [PubMed] 11. Abrams R, Taylor MA. A rating scale for emotional blunting. Am J Psychiatry. 1978;135:226–229. [PubMed] 12. Silvia PJ. What is interesting? exploring the appraisal structure of interest. Emotion. 2005;5:89–102. [PubMed] 13. Blanchard JJ, Mueser KT, Bellack AS. Anhedonia, positive and negative affect, and social functioning in schizophrenia. Schizophr Bull. 1998;24:413–424. [PubMed] 14. Blanchard JJ, Horan WP, Brown SA. Diagnostic differences in social anhedonia: a longitudinal study of schizophrenia and major depressive disorder. J Abnorm Psychol. 2001;110:363–371. [PubMed] 15. Horan WP, Blanchard JJ. Emotional responses to psychosocial stress in schizophrenia: the role of individual differences in affective traits and coping. Schizophr Res. 2003;60:271–283. [PubMed] 16. Andreasen NC, Flaum M. Schizophrenia: the characteristic symptoms. Schizophr Bull. 1982;17:27–49. [PubMed] 17. Lewine RRJ. A discriminant validity study of negative symptoms with a special focus on depression and antipsychotic medication. Am J Psychiatry. 1990;147:1463–1466. [PubMed]
18. Schuldberg D, Quinlan DM, Morgenstern H, Glazer W. Positive and negative symptoms in chronic psychiatric outpatients: reliability, stability, and factor structure. Psychol Assess. 1990;2:262–268.
19. Mueser KT, Sayers SL, Schooler NR, Mance RM, Haas GL. A multisite investigation of the reliability of the scale for the assessment of negative symptoms. Am J Psychiatry. 1994;151:1453–1462. [PubMed] 20. Norman RMG, Malla AK, Cortese L, Diaz F. A study of the interrelationship between and comparative interrater reliability of the SAPS, SANS, and PANSS. Schizophr Res. 1996;19:73–85. [PubMed] 21. Peralta V, Cuesta MJ. Dimensional structure of psychotic symptoms: an item-level analysis of SAPS and SANS symptoms in psychotic disorders. Schizophr Res. 1999;38:13–26. [PubMed] 22. Addington J, Addington D. Positive and negative symptoms of schizophrenia: their course and relationship over time. Schizophr Res. 1991;5:51–59. [PubMed] 23. Mueser KT, Douglas MS, Bellack AS, Morrison RL. Assessment of enduring deficit and negative symptom subtypes in schizophrenia. Schizophr Bull. 1991;17:565–582. [PubMed] 24. Arndt S, Andreasen NC, Flaum M, Miller D. A longitudinal study of symptom dimensions in schizophrenia: prediction and patterns of change. Arch Gen Psychiatry. 1995;52:352–360. [PubMed] 25. Gur RE, Cowell P, Turetsky BI, et al. A follow-up magnetic resonance imaging study of schizophrenia: relationship of neuroanatomical changes to clinical and neurobehavioral measures. Arch Gen Psychiatry. 1998;55:145–152. [PubMed] 26. Rey ER, Bailer J, Bräuer W, Händel M. Stability trends and longitudinal correlations of negative and positive syndromes within a three-year follow-up of initially hospitalized schizophrenics. Acta Psychiatr Scand. 1994;90:405–412. [PubMed] 27. Andreasen NC, Arndt S, Alliger R, Miller D. Symptoms of schizophrenia: methods, meanings, and mechanisms. Arch Gen Psychiatry. 1995;52:341–351. [PubMed] 28. Gur RE, Mozley PD, Resnick SM, Levick S. Relations among clinical scales in schizophrenia. Am J Psychiatry. 1991;48:472–478. [PubMed] 29. Fenton WS, McGlashan TH. Natural history of schizophrenia subtypes: II. positive and negative symptoms and long-term course. Arch Gen Psychiatry. 1991;48:978–986. [PubMed] 30. Gelber EI, Kohler CG, Bilker WB, et al. Symptom and demographic profiles in first-episode schizophrenia. Schizophr Res. 2004;67:185–194. [PubMed] 31. Fenton WS, McGlashan TH. Antecedents, symptoms progression, and long-term outcome of the deficit syndrome in schizophrenia. Am J Psychiatry. 1994;151:351–356. [PubMed] 32. Möller H, Bottlender R, Groß A, et al. The Kraepelinian dichotomy: preliminary results of a 15-year follow-up study on functional psychoses: focus on negative symptoms. Schizophr Res. 2002;56:87–94. [PubMed] 33. Andreasen NC, Olsen SA. Negative v positive schizophrenia: definition and validation. Arch Gen Psychiatry. 1982;39:789–794. [PubMed]
34. Siris SG. Managing depression in schizophrenia. Psychiatr Ann. 2005;35:60–69.
35. Häfner J, Löffler W, Maurer K, Hambrecht M, an der Heiden W. Depression, negative symptoms, social stagnation and social decline in the early course of schizophrenia. Acta Psychiatr Scand. 1999;100:105–118. [PubMed] 36. Kelley ME, van Kammen DP, Allen DN. Empirical validation of primary negative symptoms: independence from effects of medication and psychosis. Am J Psychiatry. 1999;156:406–411. [PubMed] 37. Kitamura T, Suga R. Depressive and negative symptoms in major psychiatric disorders. Compr Psychiatry. 1991;32:88–94. [PubMed] 38. Sax KW, Strakowski SM, Keck PEJ, Upadhyaya VH. Relationships among negative, positive, and depressive symptoms in schizophrenia and psychotic depression. Br J Psychiatry. 1996;168:68–71. [PubMed] 39. Whiteford HA, Riney SJ, Csernansky JG. Distinguishing depressive and negative symptoms in chronic schizophrenia. Psychopathology. 1987;20:234–236. [PubMed] 40. Brébion G, Amador X, Smith M, Malaspina D, Sharif Z, Gorman JM. Depression, psychomotor retardation, negative symptoms, and memory in schizophrenia. Neuropsychiatry Neuropsychol Behav Neurol. 2000;13:177–183. [PubMed] 41. Kulhara P, Avasthi A. Influence of depressive symptoms and premorbid adjustment on factor structure of phenomenology of schizophrenia: a study from India. Eur Psychiatry. 2003;18:226–232. [PubMed] 42. Kulhara P, Avasthi A, Chadda R, Chandiramani K. Negative and depressive symptoms in schizophrenia. Br J Psychiatry. 1989;154:207–211. [PubMed] 43. Goldman RS, Tandon R, Liberzon I, Greden JF. Measurement of depression and negative symptoms in schizophrenia. Psychopathology. 1992;25:49–56. [PubMed] 44. Müller M, Szegedi A, Wetzel H, Benkert O. Depressive factors and their relationships with other symptom domains in schizophrenia, schizoaffective disorder, and psychotic depression. Schizophr Bull. 2001;27:19–28. [PubMed]
45. Blanchard JJ, Cohen AS. The structure of negative symptoms in schizophrenia: implications for assessment. Schizophr Bull. In press.
46. Keefe RS, Harvey PD, Lenzenweger MF, Davidson M. Empirical assessment of the factorial structure of clinical symptoms in schizophrenia: negative symptoms. Psychiatry Res. 1992;44:153–165. [PubMed]
47. Sayers SL, Curran PJ, Mueser KT. Factor structure and construct validity of the scale for the assessment of negative symptoms. Psychol Assess. 1996;8:269–280.
48. Cronbach LJ, Meehl PE. Construct validity in psychological tests. Psychol Bull. 1955;52:281–302. [PubMed]
49. Davidson RJ, Scherer KR, Goldsmith HH, editors. Handbook of Affective Sciences. London: Oxford University Press; 2003.
50. Ochsner KN. Current directions in social cognitive neuroscience. Curr Opin Neurobiol. 2004;14:254–258. [PubMed] 51. Ho B, Nopoulos P, Flaum M, Arndt S, Andreasen NC. Two-year outcome in first-episode schizophrenia: predictive value of symptoms for quality of life. Am J Psychiatry. 1998;155:1196–1201. [PubMed] 52. Mueser KT, Bellack AS, Morrison RL, Wixted JT. Social competence in schizophrenia: premorbid adjustment, social skill, and domains of functioning. J Psychiatr Res. 1990;24:51–63. [PubMed] 53. Bellack AS, Morrison RL, Wixted JT, Mueser KT. An analysis of social competence in schizophrenia. Br J Psychiatry. 1990;156:809–818. [PubMed] 54. Green MF, Kern RS, Braff DL, Mintz J. Neurocognitive deficits and functional outcome in schizophrenia: are we measuring the “right stuff”? Schizophr Bull. 2000;26:119–136. [PubMed] 55. Hammer MA, Katsanis J, Iacono WG. The relationship between negative symptoms and neuropsychological performance. Bio Psychiatry. 1995;37:828–830. [PubMed] 56. Sanfilipo M, Lafargue T, Rusinek H, et al. Cognitive performance in schizophrenia: relationship to regional brain volumes and psychiatric symptoms. Psychiatry Res: Neuroimaging. 2002;116:1–23. [PubMed] 57. Eikmeier G, Lodemann E, Olbrich HM, Pach J. Altered fronto-central PINV topography and the primary negative syndrome in schizophrenia. Schizophr Res. 1993;8:251–256. [PubMed] 58. Zemishlany Z, Alexander GE, Prohovnik I, Goldman RG. Cortical blood flow and negative symptoms of schizophrenia. Neuropsychobiology. 1996;33:127–131. [PubMed] 59. Sanfilipo M, Lafargue T, Rusinek H, et al. Volumetric measure of the frontal and temporal lobe regions in schizophrenia: relationship to negative symptoms. Arch Gen Psychiatry. 2000;57:471–480. [PubMed] 60. Wolkin A, Choi SJ, Szilagyi S, Sanfilipo M, Rotrosen JP, Lim KO. Inferior frontal white matter anisotropy and negative symptoms of schizophrenia: a diffusion tensor imaging study. Am J Psychiatry. 2003;160:572–574. [PubMed] 61. Dollfus S, Petit M. Negative symptoms in schizophrenia: their evolution during an acute phase. Schizophr Res. 1995;17:187–194. [PubMed] 62. Eckert SL, Diamond PM, Miller AL, Velligan DI. A comparison of instrument sensitivity to negative symptom change. Psychiatry Res. 1996;63:67–75. [PubMed] 63. Silver H, Aharon N, Kaplan A. Add-on fluvoxamine improves primary negative symptoms: evidence for specificity from response analysis of individual symptoms. Schizophr Bull. 2003;29:541–546. [PubMed]
64. Eckblad ML, Chapman LJ, Chapman JP, Mishlove M. Unpublished test, University of Wisconsin, Madison; 1982. The Revised Social Anhedonia Scale.
65. Chapman LJ, Chapman JP. University of Wisconsin, Madison; 1978. The Revised Physical Anhedonia Scale, Unpublished test.
66. Herbener ES, Harrow M. The course of anhedonia during 10 years of schizophrenic illness. J Abnorm Psychol. 2002;111:237–248. [PubMed]
67. Horan WP, Green MF, Kring AM, Nuechterlein KH. Does anhedonia in schizophrenia reflect faulty memory for subjectively experienced emotions? J Abnorm Psychol. In press.
68. Berlin I, Givry-Steiner L, Lecrubier Y, Puech AJ. Measures of anhedonia and hedonic responses to sucrose in depressive and schizophrenic patients in comparison with healthy subjects. Eur Psychiatry. 1998;13:303–309. [PubMed] 69. Fawcett J, Clark DC, Scheftner WA, Gibbons RD. Assessing anhedonia in psychiatric patients: the pleasure scale. Arch Gen Psychiatry. 1983;40:79–84. [PubMed] 70. Loas G, Boyer P, Legrand A. Anhedonia in the deficit syndrome of schizophrenia. Psychopathology. 1999;32:207–219. [PubMed] 71. Snaith RP, Hamilton M, Morley S, Humayan A. A scale for the assessment of the hedonic tone: the Snaith-Hamilton pleasure scale. Br J Psychiatry. 1995;167:99–103. [PubMed] 72. Silver H, Shlomo N. Anhedonia and schizophrenia: how much is in the eye of the beholder? Compr Psychiatry. 2002;43:65–68. [PubMed] 73. Berenbaum H, Oltmanns TF. Emotional experience and expression in schizophrenia and depression. J Abnorm Psychol. 1992;101:37–44. [PubMed] 74. Blanchard JJ, Bellack AS, Mueser KT. Affective and social-behavioral correlates of physical and social anhedonia in schizophrenia. J Abnorm Psychol. 1994;103:719–729. [PubMed] 75. Clementz BA, Grove WM, Katsanis J, Iacono WG. Psychometric detection of schizotypy: perceptual aberration and physical anhedonia in relatives of schizophrenics. J Abnorm Psychol. 1991;100:607–612. [PubMed] 76. Franke P, Maier W, Hardt J, Hain C, Cornblatt BA. Attentional abilities and measures of schizotypy: their variation and covariation in schizophrenic patients, their siblings, and normal control subjects. Psychiatry Res. 1994;54:259–272. [PubMed] 77. Grove WM, Lebow BS, Clementz BA, Cerri A. Familial prevalence and coaggregation of schizotypy indicators: a multitrait family study. J Abnorm Psychol. 1991;100:115–121. [PubMed]
78. Horan WP, Dawson ME, Schell AM, Ventura J, Subotnik KL, Nuechterlein KH. Longitudinal stability and psychophysiological correlates of physical anhedonia in recent-onset schizophrenia. Paper presented at: Annual Meeting of the Society for Research in Psychopathology. St. Louis, Mo: 2004.
79. Katsanis J, Iacono WG, Beiser M. Anhedonia and perceptual aberration in first-episode psychotic patients and their relatives. J Abnorm Psychol. 1990;99:202–206. [PubMed] 80. Laurent A, Biloa-Tang M, Bougerol T, et al. Executive/attentional performance and measures of schizotypy in patients with schizophrenia and in their nonpsychotic first-degree relatives. Schizophr Res. 2000;46:269–283. [PubMed] 81. Schlenker R, Cohen R, Hopmann G. Affective modulation of the startle reflex in schizophrenic patients. Eur Arch Psychiatry Clin Neurosci. 1995;245:309–318. [PubMed] 82. Schürhoff F, Szöke A, Bellivier F, et al. Anhedonia in schizophrenia: a distinct familial subtype? Schizophr Res. 2003;61:59–66. [PubMed] 83. Horan WP, Blanchard JJ. Neurocognitive, social, and emotional dysfunction in deficit syndrome schizophrenia. Schizophr Res. 2003;65:125–137. [PubMed] 84. Kirkpatrick B, Buchanan RW. Anhedonia and the deficit syndrome of schizophrenia. Psychiatry Res. 1990;31:25–30. [PubMed] 85. Loas G, Noisette C, Legrand A, Boyer P. Anhedonia, depression and the deficit syndrome of schizophrenia. Acta Psychiatr Scand. 1996;94:477–479. [PubMed] 86. Schuck JR, Leventhal D, Rothstein H, Irizarry V. Physical anhedonia and schizophrenia. J Abnorm Psychol. 1984;93:342–344. [PubMed] 87. Katsanis J, Iacono WG, Beiser M, Lacey L. Clinical correlates of anhedonia and perceptual aberration in first-episode patients with schizophrenia and affective disorder. J Abnorm Psychol. 1992;101:184–191. [PubMed] 88. Loas G, Salinas E, Guelfi JD, Samuel-Lajeunesse B. Physical anhedonia in major depressive disorder. J Affective Disord. 1992;25:139–146. [PubMed] 89. Blanchard JJ, Horan WP, Brown SA. Diagnostic differences in the temporal stability of social anhedonia: a longitudinal study of schizophrenia and major depressive disorder. J Abnorm Psychol. 2001;110:363–371. [PubMed] 90. Herbener ES, Harrow M, Hill SK. Change in the relationship between anhedonia and functional deficits over a 20-year period in individuals with schizophrenia. Schizophr Res. 2005;75:97–105. [PubMed] 91. Berenbaum H, Fujita F. Schizophrenia and personality: exploring the boundaries and connections between vulnerability and outcome. J Abnorm Psychol. 1994;103:148–158. [PubMed] 92. Horan WP, Subotnik KL, Reise S, Ventura J, Nuechterlein KH. Personality characteristics in recent-onset schizophrenia: longitudinal stability and clinical correlates. Psychol Med. 2005;35:995–1005. [PubMed] 93. Watson D, Clark LA. Negative affectivity: the disposition to experience aversive emotional states. Psychol Bull. 1984;96:465–490. [PubMed] 94. Meehl PE. Primary and secondary hypohedonia. J Abnorm Psychol. 2001;110:188–193. [PubMed] 95. Myin-Germeys I, Delespaul PA, deVries MW. Schizophrenia patients are more emotionally active than is assumed based on their behavior. Schizophr Bull. 2000;26:847–853. [PubMed] 96. Myin-Germeys I, van Os J, Schwartz JE, Stone AA, Delespaul PA. Emotional reactivity to daily life stress in psychosis. Arch Gen Psychiatry. 2001;58:1137–1144. [PubMed] 97. Franke P, Maier W, Hardt J, Hain C. Cognitive functioning and anhedonia in subjects at risk for schizophrenia. Schizophr Res. 1993;10:77–84. [PubMed] 98. Arnfred SM, Chen ACN. Exploration of somatosensory P50 gating in schizophrenia spectrum patients: reduced P50 amplitude correlates to social anhedonia. Psychiatry Res. 2004;125:147–159. [PubMed] 99. Gruzelier J, Davis S. Social and physical anhedonia in relation to cerebral laterality and electrodermal habituation in unmedicated psychotic patients. Psychiatry Res. 1995;56:163–172. [PubMed] 100. Van den Bosch RJ, Rozendaal N, Mol JM. Slow potential correlates of frontal function, psychosis, and negative symptoms. Psychiatry Res. 1988;23:201–208. [PubMed]
101. Horan WP, Green MF, Sergi M, et al. Motivation and social cognition in schizophrenia: differential associations with distinct aspects of community functioning. Paper presented at: International Congress of Schizophrenia Research. Savannah, Ga: 2005.
102. Erlenmeyer-Kimling L, Cornblatt BA, Rock D, Roberts S. The New York high-risk project: anhedonia, attentional deviance, and psychopathology. Schizophr Bull. 1993;19:141–153. [PubMed] 103. Freedman LR, Rock D, Roberts SA, Cornblatt BA, Erlenmeyer-Kimling L. The New York high-risk project: attention, anhedonia and social outcome. Schizophr Res. 1998;30:1–9. [PubMed] 104. Horan WP, Blanchard JJ, Gangestad SW, Kwapil TR. The psychometric detection of schizotypy: do putative schizotypy indicators identify the same latent class? J Abnorm Psychol. 2004;113:339–357. [PubMed] 105. Craver JC, Pogue-Geile MF. Familial liability to schizophrenia: a sibling study of negative symptoms. Schizophr Bull. 1999;25:827–839. [PubMed] 106. Kendler KS, Thacker L, Walsh D. Self-report measures of schizotypy as indices of familial vulnerability to schizophrenia. Schizophr Bull. 1996;22:511–520. [PubMed] 107. Gooding DC, Miller MD, Kwapil TR. Smooth pursuit eye tracking and visual fixation in psychosis-prone individuals. Psychiatry Res. 2000;93:41–54. [PubMed]
108. Horan WP, Brown S, Blanchard JJ. Social anhedonia, schizotypy, and candidate potentiators of clinical outcome. Submitted.
109. Kwapil TR, Crump RA, Pickup DR. Assessment of psychosis proneness in African-American college students. J Clin Psychol. 2002;58:1601–1614. [PubMed] 110. Gooding DC, Kwapil TR, Tallent KA. Wisconsin card sorting test deficits in schizotypic individuals. Schizophr Res. 1999;40:201–209. [PubMed] 111. Kerns JG, Berenbaum H. Aberrant semantic and affective processing in people at risk for psychosis. J Abnorm Psychol. 2000;109:728–732. [PubMed] 112. Luh KE, Gooding DC. Perceptual biases in psychosis-prone individuals. J Abnorm Psychol. 1999;108:283–289. [PubMed] 113. Tallent KA, Gooding DC. Working memory and Wisconsin card sorting test performance in schizotypic individuals: a replication and extension. Psychiatry Res. 1999;89:161–170. [PubMed] 114. Gooding DC. Antisaccade task performance in questionnaire-identified schizotypes. Psychiatry Res. 1999;35:157–166. [PubMed] 115. Simons RF. Physical anhedonia and future psychopathology: an electrocortical continuity? Psychophysiology. 1982;19:433–440. [PubMed]
116. Simons RF, Russo KR. Event-related potentials and continuous performance in subjects with physical anhedonia or perceptual aberrations. J Psychophysiology. 1987;1:401–410.
117. Gooding DC, Tallent KA, Matts CW. Clinical status of at-risk individuals 5 years later: further validation of the psychometric high-risk strategy. J Abnorm Psychol. 1995;114:170–175. [PubMed] 118. Kwapil TR. Social anhedonia as a predictor of the development of schizophrenia-spectrum disorders. J Abnorm Psychol. 1998;107:558–565. [PubMed] 119. Dworkin R. Affective deficits and social deficits in schizophrenia: what's what? Schizophr Bull. 1992;18:59–64. [PubMed]
120. Bradley MM, Lang P. Measuring emotion: behavior, feeling, physiology. In: Lane R, Nadel L, editors. Cognitive Neuroscience of Emotion. New York: Oxford University Press; 2000. pp. 242–276.
121. Kring AM, Earnst KS. Stability of emotional responding in schizophrenia. Behav Ther. 1999;30:373–388.
122. Kring AM, Neale JM. Do schizophrenic patients show a disjunctive relationship among expressive, experiential, and psychophysiological components of emotion? J Abnorm Psychol. 1996;105:249–257. [PubMed] 123. Kring AM, Kerr SL, Smith DA, Neale JM. Flat affect in schizophrenia does not reflect diminished subjective experience of emotion. J Abnorm Psychol. 1993;102:507–517. [PubMed] 124. Salem JE, Kring AM. Flat affect and social skills in schizophrenia: evidence for their independence. Psychiatry Res. 1999;87:159–167. [PubMed] 125. Aghevli M, Blanchard JJ, Horan WP. The expression and experience of emotion during social interactions in schizophrenia. Psychiatry Res. 2003;119:261–270. [PubMed] 126. Volz M, Hamm AO, Kirsch P, Rey E. Temporal course of emotional startle modulation in schizophrenia patients. Int J Psychophysiol. 2003;49:123–137. [PubMed] 127. Curtis CE, Lebow B, Lake DS, Katsanis J, Iacono WG. Acoustic startle reflex in schizophrenia patients and their first-degree relatives: evidence of normal emotional modulation. Psychophysiology. 1999;36:469–475. [PubMed] 128. Paradiso S, Andreasen NC, Crespo-Facorro B, et al. Emotions in unmedicated patients with schizophrenia during evaluation with positron emission tomography. Am J Psychiatry. 2003;160:1775–1783. [PubMed]
129. Kring AM, Germans MK. Subjective experience of emotion in schizophrenia. In: Jenkins JH, Barrett RJ, editors. Culture, Subjectivity, and Schizophrenia. New York: Russell Sage Foundation; 2003. pp. 329–348.
130. Kring AM, Feldman-Barrett L, Gard D. On the broad applicability of the affective circumplex: representations of affective knowledge in schizophrenia. Psychol Sci. 2003;14:207–214. [PubMed] 131. Earnst KS, Kring AM, Kadar MA, Salem JE, Shepard D, Loosen PT. Facial expression in schizophrenia. Bio Psychiatry. 1996;40:556–558. [PubMed] 132. Kring AM, Kerr SL, Earnst KS. Schizophrenic patients show facial reactions to emotional facial expressions. Psychophysiology. 1999;36:186–192. [PubMed] 133. Mattes RM, Schneider F, Heimann H, Birbaumer N. Reduced emotional response of schizophrenic patients in remission during social interaction. Schizophr Res. 1995;17:249–255. [PubMed]
134. Lewine RRJ. Anhedonia and the amotivational state of schizophrenia. In: Andreasen NC, Tsuang MT, editors. Negative versus Positive Schizophrenia. Berlin: Springer-Verlag; 1991. pp. 79–85.
135. Aleman A, Hijman R, de Haan EHF, Kahn RS. Memory impairment in schizophrenia: a meta-analysis. Am J Psychiatry. 1999;156:1358–1366. [PubMed] 136. Heinrichs RW, Zakzanis KK. Neurocognitive deficit in schizophrenia: a quantitative review of the evidence. Neuropsychol. 1998;12:426–445. [PubMed] 137. Depue RA, Iacono WG. Neurobehavioral aspects of affective disorders. Ann Rev Psychol. 1989;40:457–492. [PubMed]
138. Gray JA. The Psychology of Fear and Stress. Cambridge, UK: Cambridge University Press; 1987.
139. Klein D. Depression and anhedonia. In: Clark DC, Fawcett J, editors. Anhedonia and affect deficit states. New York: PMA Publishing; 1984.
140. Berridge KC, Robinson TE. What is the role of dopamine in reward: hedonic impact, reward learning, or incentive salience? Brain Res Rev. 1998;28:309–369. [PubMed] 141. Berridge KC, Robinson TE. Parsing reward. Trends Neurosci. 2003;26:507–513. [PubMed] 142. Knutson B, Fong GW, Adams CM, Varner JL, Hommer D. Dissociation of reward anticipation and outcome with event-related fMRI. Neuroreport. 2001;12:3683–3687. [PubMed] 143. O'Doherty J, Kringelbach ML, Rolls ET, Hornak J, Andrews C. Abstract reward and punishment representations in the human orbitofrontal cortex. Nat Neurosci. 2001;4:95–102. [PubMed]
144. Germans MK, Kring AM. Hedonic deficit in anhedonia: support for the role of approach motivation. Pers Individ Dif. 2000;28:659–672.
145. Kring AM. Emotion in schizophrenia: old mystery, new understanding. Psychol Sci. 1999;8:160–163.
146. Gard DE, Germans-Gard M, Kring AM, John OP. Anticipatory and consummatory components of the experience of pleasure: a scale development study. Submitted.
147. Gard DE, Germans-Gard MK, Horan WP, Kring AM, John OP, Green MF. San Francisco, Calif: 2003. Anticipatory and consummatory pleasure in schizophrenia: a scale development. Paper presented at: Annual Meeting of the Society for Research in Psychopathology.
148. Delespaul AEG. Assessing Schizophrenia in Daily Life. Maastricht, The Netherlands: Universitaire Pers Maastricht; 1995.
149. Berenbaum H. Varieties of joy-related pleasurable activities and feelings. Cogn Emotion. 2002;16:473–494.
150. Crespo-Facorro B, Paradiso S, Andreasen NC, et al. Neural mechanisms of anhedonia in schizophrenia: a PET study of response to unpleasant and pleasant odors. JAMA. 2001;286:427–435. [PubMed] 151. Moberg PJ, Arnold SE, Doty RL, et al. Impairment of odor hedonics in men with schizophrenia. Am J Psychiatry. 2003;160:1784–1789. [PubMed] 152. Watson D, Clark LA, Tellegen A. Development and validation of brief measures of positive and negative affect: The PANAS scales. J Pers Soc Psychol. 1988;54:1063–1070. [PubMed] 153. Blanchard JJ, Horan WP, Collins LM. Examining the latent structure of negative symptoms: is there a distinct subtype of negative symptom schizophrenia? Schizophr Res. 2005;7:151–165. [PubMed]