Aspects of unconscious processes in a group of seriously disturbed psychiat
ric patients are examined in an effort to predict near-lethal suicide attem
pts and explore psychoanalytic formulations of suicide. The Rorschach Inkbl
ot Test, the most widely used projective measure in suicide research (Bonga
r 1991), was chosen for its potential to shed light on specific unconscious
processes. Psychic states commonly associated with suicide were measured b
y psychoanalytic Rorschach analog scales and then subjected to a progressio
n of statistical analyses in order to predict future occurrence and lethali
ty of suicide attempts. On the basis of a priori hypotheses, the authors de
veloped a suicide index comprising four psychoanalytic Rorschach signs that
predicted, with considerable accuracy which patients would later make near
-lethal suicide attempts. The best predictors were unconscious processes in
dicative of penetrating affective overstimulation, disturbance in the capac
ity to maintain adequate ego boundaries, and depressive affective states ch
aracterized by a morbid preoccupation with death and inner decay. These fin
dings provide empirical support for several well-known formulations of the
unconscious motivations for suicide.