J. Addington

Publications487
h-index85
Citations24,042
Highly Influential Citations1,368
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A depression rating scale for schizophrenics
Scales for assessing depression are well developed for non-psychotic populations but have been criticized for being inappropriate for psychotic populations. As a result we have developed a new rating… Expand
  • 989
  • 128
Assessing depression in schizophrenia: the Calgary Depression Scale.
Since existing depression scales were designed for assessment of depression in non-psychotic populations, such scales have items which do not distinguish depressed from non-depressed psychotic… Expand
  • 780
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Prediction of psychosis in youth at high clinical risk: a multisite longitudinal study in North America.
CONTEXT Early detection and prospective evaluation of individuals who will develop schizophrenia or other psychotic disorders are critical to efforts to isolate mechanisms underlying psychosis onset… Expand
  • 1,143
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Reliability and validity of a depression rating scale for schizophrenics
The Calgary Depression Scale (CDS) is a nine item structured interview scale, in which each item has a four point measure, each point anchored by descriptors. The scale has been specifically… Expand
  • 562
  • 47
The psychosis high-risk state: a comprehensive state-of-the-art review.
CONTEXT During the past 2 decades, a major transition in the clinical characterization of psychotic disorders has occurred. The construct of a clinical high-risk (HR) state for psychosis has evolved… Expand
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Facial affect recognition and information processing in schizophrenia and bipolar disorder
This study assessed facial affect recognition and visual attention in a sample of 40 individuals with schizophrenia, at hospitalization and 3 months later during an out-patient phase of relative… Expand
  • 446
  • 37
Randomized, double-blind trial of olanzapine versus placebo in patients prodromally symptomatic for psychosis.
OBJECTIVE This study assessed the efficacy of olanzapine in delaying or preventing conversion to psychosis and reducing symptoms in people with prodromal symptoms of schizophrenia. METHOD This… Expand
  • 503
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Validity of the prodromal risk syndrome for first psychosis: findings from the North American Prodrome Longitudinal Study.
Treatment and prevention studies over the past decade have enrolled patients believed to be at risk for future psychosis. These patients were considered at risk for psychosis by virtue of meeting… Expand
  • 362
  • 22
Facial affect recognition: A mediator between cognitive and social functioning in psychosis?
BACKGROUND Facial affect recognition has been implicated in the relationship between cognition and social functioning. This 1-year longitudinal study tested the hypothesis that facial affect… Expand
  • 319
  • 19
Medication adherence of individuals with a first episode of psychosis
Objective:  To determine rates of adherence to antipsychotic medication in first episode patients and the correlates of adherence in this group.
  • 387
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