1. The paradigms of the overlapping of the affective and schizophrenic spectra: schizo-affective conditions Andreas Marneros; 2. The overlapping of the spectra: overlapping genes and genetic models John R. Kelsoe; 3. The continuum of psychosis and its genetic basis T. J. Crow; 4. Functional psychoses - molecular-genetic evidence for a continuum Hans H. Stassen, Christian Scharfetter and Jules Angst; 5. State- and trait-related deficits in sustained attention in bipolar disorder: are there any overlaps with schizophrenia? Luke Clark; 6. The concept of schizoaffective disorder - utility versus validity and reliability: a transcultural perspective Ahmed Okasha; 7. Phenomenological approaches to the schizoaffective spectrum William Coryell; 8. Clinical course of schizoaffective disorders M. Reinares, E. Vieta, A. Benabarre and A. Marneros; 9. Depressive syndromes in schizophrenia Wolfgang Gaebel, Ellen Bittner and Wolfgang Wölwer; 10. The overlapping of the spectra - brief and acute psychoses Frank Pillmann and Andreas Marneros; 11. Overlapping of the spectra: physical comorbidity between schizophrenia and affective disorders William S. Stone, Andrea H. Roe and Ming T. Tsuang; 12. The overlapping of the spectra: suicide Simavi Vahip; 13. Biological treatment of schizoaffective disorders Christopher Baethge; 14. Psychological therapies and shizoaffective disorders Jan Scott; 15. Epilogue: the interface of affective and schizophrenic disorders: a cross between two spectra? Hagop S. Akiskal.