Perceptual learning, improvement in perceptual skill with practice, can improve both accuracy and consistency of perceptual reports. Regression statistics can quantify ongoing calibration of perceptible scalar properties (i.e., improvements in accuracy and consistency) because, ideally, actual and perceived values are linearly related. Changes in variance accounted for (r2) track changes in con...

BACKGROUND The Good Food Junction Grocery Store was opened in a former food desert in the inner city of Saskatoon, Canada. OBJECTIVE The purpose of this research was to examine, using grocery store sales data, healthy and less healthful food purchasing over a one-year period beginning eight months after opening by shoppers' neighborhood of residence. DESIGN A multilevel cross sectional desi...

This paper discusses a decentralized multi-robot coordination strategy which aims to control and guide a team of robotic agents safely through a hostile area. The ”hostility” of the environment is due to the presence of enemy forces, seeking to intercept the robotic team. In order to avoid detection and ensure global team safety, the robotic agents must carefully plan their trajectory towards a...

BACKGROUND In many Western countries, an increasing number of children with separated parents have joint physical custody, that is, live equally much in their parent's respective homes. In Sweden, joint physical custody is particularly common and concerns between 30% and 40% of the children with separated parents. It has been hypothesised that the frequent moves and lack of stability in parenti...

When walking to intercept a moving target, people take an interception path that appears to anticipate the target's trajectory. According to the constant bearing strategy, the observer holds the bearing direction of the target constant based on current visual information, consistent with on-line control. Alternatively, the interception path might be based on an internal model of the target's mo...

OBJECTIVE To assess community awareness of childhood immunizations and intent to immunize children after a social marketing immunization campaign. METHODS We used 2 interviewer-assisted street-intercept surveys to evaluate awareness of childhood immunizations and intent to immunize low-income children. The "Take Control! Immunize" social marketing campaign was developed using a community-base...

BACKGROUND Body mass index (BMI) rebound refers to the beginning of the second rise in BMI during childhood. Accurate estimation of an individual's timing of BMI rebound is important because it is associated with health outcomes in later life. METHODS We estimated BMI trajectories for 6545 children from the Avon Longitudinal Study of Parents and Children. We used a novel Bayesian two-phase pi...

Governments routinely intercept messages as part of counterterrorism efforts. We consider the problem of identifying and associating messages between members of a threat group when the content is apparently innocuous and senders and/or receivers are not identifiable as particular people. We show that clusters of related messages can be identified when they use words in correlated ways (which al...