A revived interest has developed in the field of depressions of which there seem to be several subtypes or categories. The diagnosis is being made more frequently or the syndrome is replacing, with the so-called borderline cases, the histrionic neuroses. A plethora of rating scales have been devised in relation to studies of drug-effects and studies on classification have begun to appear. The University of Sydney symposium is therefore topical. In addition its contributors have produced considerable original work and the discussion has been carefully edited to make, as symposia go, unusual sense.
Dr. Kiloh in an attempt at differentiation of depressive syndromes first reviews the literature which seems to indicate that two discernible types exist: endogenous and reactive. Using a 35 trait list analyzed as to presence or absence in 92 cases, two factors were obtained corresponding to the traditional dichotomous classification.