Low response rate schools in surveys of adolescent risk taking behaviours: possible biases, possible solutions

Low response rate schools in surveys of adolescent risk taking behaviours: possible biases, possible solutions.

STUDY OBJECTIVE To examine the potential biases introduced when students in low response rate schools are dropped from classroom based surveys of adolescent risk taking behaviour. DESIGN Self administered confidential surveys were conducted in classrooms, with follow up visits to each school to survey students absent during the initial survey administration. Data on students in schools that a...

Visual perspective taking and laterality decisions: Problems and possible solutions

Perspective taking plays an important role in different areas of psychological and neuroscientific research. Visual perspective taking is an especially prominent approach generally using one of two experimental tasks: in the own-body-transformation task observers are asked to judge the laterality of a salient feature of a human figure (e.g., is the glove on the left or right hand?) from the fig...

Possible biases induced by MCMC convergence diagnosticsbyMary

Possible biases induced by MCMC convergence diagnostics

Convergence diagnostics are widely used to determine how many initial “burn-in” iterations should be discarded from the output of a Markov chain Monte Carlo (MCMC) sampler in the hope that the remaining samples are representative of the target distribution of interest. This paper demonstrates that some ways of applying convergence diagnostics may actually introduce bias into estimation based on...

Possible Behaviours for the Mitchell Ordering

We use a mixture of forcing and inner models techniques to get some results on the possible behaviours of the Mitchell ordering at a measurable .