In cohort studies, who does or does not receive an intervention is determined by practice
patterns, personal choice, or policy decisions. This raises the possibility that the intervention …

… In 2010, Streiner and Norman 1 reported the discovery of a new disorder, called malignant
hypertrophy of the ego (MHE), which is highly prevalent in some groups, such as politicians, …

Both research and clinical decision making rely on measurement scales. These scales vary
with regard to their psychometric properties, ease of administration, dimensions covered by …

… Of course, much has been written on the topic of research design already (eg Streiner
and Norman 2009) and an extended discussion is beyond the scope of this chapter. We do, …

Cronbach's α is the most widely used index of the reliability of a scale. However, its use and
interpretation can be subject to a number of errors. This article discusses the historical …

This new edition of the book will be produced in two versions. The textbook will include a CD-Rom
with two videotaped lectures by the authors. This book translates biostatistics in the …

Objective Results of reliability and agreement studies are intended to provide information
about the amount of error inherent in any diagnosis, score, or measurement. The level of …

One of the central tenets of classical test theory is that scales should have a high degree of
internal consistency, as evidenced by Cronbach's α, the mean interitem correlation, and a …

OBJECTIVE: The authors assessed lifetime psychopathology in a general population sample
and compared the rates of five psychiatric disorder categories between those who reported …

The objective of this study was to report on the prevalence and correlates of anxiety and
mood problems among 9- to 14- year-old children with Asperger syndrome (AS) and high-…