In trying to understand the recent rise in its importance, one must ask, What is new about the
negative symptom construct? The term itself is certainly not a new one. It played an …

We present results from three studies on the development and validation of the Multiple
Ability Self-Report Questionnaire (MASQ), a self-report measure comprising items from five …

Affective deficits and social deficits have played an important role in theory and research on
schizophrenia, and it has generally been assumed that these are two different types of …

Formal thought disorder (FTD), defined as abnormal speech, has been associated with
schizophrenia and likened to fluent aphasia. Whether FTD differentiates subtypes of …

Schizophrenia and affective disorder are separately classified. Schizoaffective disorder has
been considered a variant of these, or representing several diseases. Some hypothesize a …

Despite strong evidence for the role of genetics in schizophrenia, the nature of the
underlying mechanisms remains elusive. Knowledge is limited regardless of recent …

We examined the relationship of trait personality dimensions (negative affectivity and
positive affectivity) on self-report of cognitive functioning. Ninety-six subjects who were …

The relation between anhedonia and affective flattening was studied in 61 normal subjects
and 61 major depressives. Affective flattening and anhedonia were defined by the following …

Background: Emotional blunting is a major clinical feature of behavioral variant
frontotemporal dementia (bvFTD). Assessing the change in emotional blunting may facilitate …

The commonly used rating scales for negative symptoms in schizophrenia have shown good
reliability, but disagreement persists regarding both the content definition and the validity of …