Posters: Psychometrics

Quantifying rater drift on the HAM-D in a sample of standardized rater training events: Implications for the reliability, sample size, and ongoing training strategy.

Global inter-rater reliability, scale validity, and local perception: PANSS ratings and reactions from 4 countries.

Are Intra Class Correlations (ICCs) Enough to Assess Rater Reliability? No!

Effect of language-specific training on rater performance in assessment of PANSS items and sub scales.

Rescaling the Positive and Negative Syndrome Scale (PANSS): Effects on percent change from baseline.

Use of Item Response Analysis to identify an Integrated Negative Symptom Factor of the Positive and Negative Syndrome Scale (PANSS) in Schizophrenia.

Psychopathological characteristics of First Episode, Chronic Inpatients and Ambulatory patients with schizophrenia: A Non-parametric Item Response Analysis.

Validation and normalization of the Russian version of the Positive and Negative Syndrome Scale (PANSS-Ru) in schizophrenia: Preliminary Findings.

A Rasch model analysis to assess cross-cultural differences in Negative Symptoms in Schizophrenia.

Using generalizability theory to estimate the effect of raters, subjects and timepoints on the reliability of symptom ratings on the Positive and Negative Syndrome Scale (PANSS).

Assessing the sources of unreliability (rater, subject, time-point) of placebo responders using items of the Positive and Negative syndrome Scale (PANSS).

PANSS item reliability: Can standardized rater training improve negative subscale item reliability.

Quantifying rater drift in an international sample of investigators participating in standardized rater training events: Is PANSS reliability maintained?

A pattern recognition matrix for placebo response in schizophrenia.

Inter-rater reliability in the assessment of paediatric schizophrenia using the PANSS: Training results from a Russian cohort.

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