We report on a novel method of identifying brain regions activated by periodic experimental design in functional magnetic resonance imaging data. This involves fitting a mixture distribution with twoâ€¦ (More)

OBJECTIVE
To test whether people who report being sensitive to mobile phone signals have more symptoms when exposed to a pulsing mobile signal than when exposed to a sham signal or a non-pulsingâ€¦ (More)

A likelihood ratio test to determine whether data arises from a single or a mixture of two normal distributions is investigated by Monte Carlo methods. The results show that the proposed samplingâ€¦ (More)

The British journal of psychiatry : the journalâ€¦

1975

Multivariate analyses are an aid to, not a substitute for critical thinking in the area of data analysis. Meaningful results can only be produced by these methods if careful consideration is given toâ€¦ (More)

Finite mixture densities can be used to model data from populations known or suspected to contain a number of separate subpopulations. Most commonly used are mixture densities with Gaussianâ€¦ (More)

When using latent class analysis to explore multivariate categorical data an important question is -- how many classes are appropriate for this data? An obvious candidate to answer the question isâ€¦ (More)