. American-psychiatric-association, Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition Washington DC; 1994. 2. World Health Organization. The ICD10 classification of mental and behavioral disorders: diagnostic criteria for research, Geneva: WHO, 1993.

M. Leboyer, Searching for Alternative Phenotypes in Psychiatric Genetics, Methods Mol Med, vol.77, pp.145-61, 2003.
DOI : 10.1385/1-59259-348-8:145

T. Ribot, La psychologie des sentiments. Paris: Felix Alcan

L. Chapman, J. Chapman, and M. Raulin, Scales for physical and social anhedonia., Journal of Abnormal Psychology, vol.85, issue.4, pp.374-82, 1976.
DOI : 10.1037/0021-843X.85.4.374

G. Loas, D. Fremaux, C. Gayant, and P. Boyer, Physical anhedonia and depression: distinct concepts ? Study of the construct validity of these dimensions in a group of 224 normal subjects, Encephale, vol.22, issue.3, pp.175-184, 1996.

G. Loas and P. Boyer, Anhedonia in endogenomorphic depression, Psychiatry Research, vol.60, issue.1, pp.57-65, 1996.
DOI : 10.1016/0165-1781(95)02748-3

L. Chapman and J. Chapman, The Search for Symptoms Predictive of Schizophrenia, Schizophrenia Bulletin, vol.13, issue.3, pp.497-503, 1987.
DOI : 10.1093/schbul/13.3.497

J. Katsanis, W. Iacono, M. Beiser, and L. Lacey, Clinical correlates of anhedonia and perceptual aberration in first-episode patients with schizophrenia and affective disorder., Journal of Abnormal Psychology, vol.101, issue.1, pp.184-91, 1992.
DOI : 10.1037/0021-843X.101.1.184

H. Berenbaum and J. Mcgrew, Familial resemblance of schizotypic traits, Psychological Medicine, vol.6, issue.02, pp.327-360, 1993.
DOI : 10.1037/0021-843X.100.2.115

H. Berenbaum, T. Oltmanns, and I. Gottesman, Hedonic capacity in schizophrenics and their twins, Psychological Medicine, vol.44, issue.02, pp.367-74, 1990.
DOI : 10.1037/h0041029

F. Schurhoff, A. Szoke, F. Bellivier, C. Turcas, M. Villemur et al., Anhedonia in schizophrenia: a distinct familial subtype? Schizophr Res 14. Association. AP. Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, pp.59-66, 1994.

J. Friedman, Diagnostic interview for genetic studies. Rationale, unique features, and training. NIMH Genetics Initiative, Arch Gen Psychiatry, vol.51, issue.11, pp.849-59, 1994.

S. Montgomery, M. Asberg, P. Bech, O. Rafaelsen, P. Kramp et al., A new depression scale designed to be sensitive to change The mania rating scale: scale construction and inter-observer agreement, 18. Maxwell ME. Family Interview for Genetic Studies. Clinical Neurogenetics Branch, Intramural Research Program, NIMH. 1992. 19. Loas G. Adaptation and French validation of physical anhedonia scale, pp.382-9430, 1978.

G. Loas, French translation of the Social and Physical Anhedonia Scale of Chapman

G. Loas and P. Boyer, Evaluation of anhedonia in psychopathology: second study of the validation of the French version of the Chapman and Chapman physical anhedonia scale. Study of 356 persons, Encephale. Ann Med Psychol, vol.21152, issue.64, pp.484-21256, 1994.

F. Assouly-besse, S. Dollfus, and M. Petit, French translation of the Chapman Social and Physical Anhedonia Questionnaire: validation of the French translation in controls and schizophrenic patients, Encephale, vol.21, issue.4, pp.273-84, 1995.

R. Fischer, B. Oliver, L. Chapman, W. Edell, J. Chapman et al., Physical anhedonia, perceptual aberration, and psychosis proneness Detection of anhedonia in the normal subject. Determination of the validity of the Chapman and Chapman (1978) revised Physical Anhedonia Scale Herbener ES, Harrow M. The course of anhedonia during 10 years of schizophrenic illness, Schizophr Bull. Encephale. J Abnorm Psychol, vol.622111, issue.2542, pp.639-53301, 1925.

T. Meyer, M. Hautzinger, D. Hay, N. Martin, D. Foley et al., Two-year stability of Psychosis Proneness Scales and their relations to personality disorder traits Phenotypic and genetic analyses of a short measure of psychosis-proneness in a large-scale Australian twin study The structure of schizotypy: a pilot multitrait twin study Psychometric detection of schizotypy: perceptual aberration and physical anhedonia in relatives of schizophrenics, J Pers Assess. Twin Res. Psychiatry Res. J Abnorm Psychol, vol.73436100, issue.2914, pp.472-8830, 1991.

H. Maes, M. Neale, K. Kendler, J. Hewitt, J. Silberg et al., Assortative mating for major psychiatric diagnoses in two population-based samples, Psychological Medicine, vol.28, issue.6, pp.1389-401, 1998.
DOI : 10.1017/S0033291798007326

C. Mathews, V. Reus, G. Loas, P. Dhee-perot, C. Chaperot et al., Assortative mating in the affective disorders: a systematic review and meta-analysis Anhedonia, alexithymia and locus of control in unipolar major depressive disorders, Compr Psychiatry. Psychopathology, vol.4231, issue.334, pp.257-62206, 1998.

A. Rossi and E. Daneluzzo, Schizotypal dimensions in normals and schizophrenic patients: a comparison with other clinical samples, Schizophrenia Research, vol.54, issue.1-2, pp.67-75, 2002.
DOI : 10.1016/S0920-9964(01)00353-X

J. Heron, I. Jones, J. Williams, M. Owen, N. Craddock et al., Self-reported schizotypy and bipolar disorder: demonstration of a lack of specificity of the Kings Schizotypy Questionnaire, Schizophrenia Research, vol.65, issue.2-3, pp.1-6, 2003.
DOI : 10.1016/S0920-9964(03)00004-5

A. Raine, E. Peters, S. Joseph, and P. Garety, The SPQ: a scale for the assessment of schizotypal personality based on DSM-III-R criteria Measurement of delusional ideation in the normal population: introducing the PDI (Peters et al. Delusions Inventory), Schizophr Bull. Schizophr Bull, vol.1725, issue.373, pp.555-64553, 1991.

F. Schurhoff, A. Szoke, A. Meary, F. Bellivier, F. Rouillon et al., Familial Aggregation of Delusional Proneness in Schizophrenia and Bipolar Pedigrees, American Journal of Psychiatry, vol.160, issue.7, pp.1313-1322, 2003.
DOI : 10.1176/appi.ajp.160.7.1313