Making sense of delusions.

True delusions have been conventionally regarded as primary or psychologically irreducible (Jaspers 1913/1959) and thus only explicable in organic terms. While Jaspers acknowledged the existence of secondary delusions, which may be understood in the light of related affect, other experiences, or hallucinations, these were of lesser theoretical importance than true delusions, in which he found a change in "the totality of understandable connections." Anglo-American psychiatry, in espousing Jaspers and rejecting psychoanalysis, has in consequence concentrated on the form and not the sense of delusions.