Introduction: What Varies when Language Varies?

The Optimal Number of Surveys when Detectability Varies

The survey of plant and animal populations is central to undertaking field ecology. However, detection is imperfect, so the absence of a species cannot be determined with certainty. Methods developed to account for imperfect detectability during surveys do not yet account for stochastic variation in detectability over time or space. When each survey entails a fixed cost that is not spent search...

Tests of utility independence when health varies over time.

In the conventional quality adjusted life year (QALY) model, people's preferences are assumed to satisfy utility independence. When health varies over time, utility independence implies that the value attached to a health state is independent of the health state that arise before or after it. Two separate studies were conducted involving a total of 155 respondents. In study one, we conducted fi...

Estimating The Return to Education When It Varies Among Individuals

Signi cance of Interspecies Matches when Evolutionary Rate Varies

We develop techniques to estimate the statistical signii cance of gap-free alignments between two genomic DNA sequences, using human–mouse alignments as an example. The sequences are assumed to be suff ciently similar that some but not all of the neutrally evolving regions (i.e., those under no evolutionary constraint) can be reliably aligned. Our goal is to model the situation in which the neu...

Processing Order in Dual-tasks When the Duration of Motor Responses Varies Processing Order in Dual-tasks When the Duration of Motor Responses Varies

R e S u M e n Bajo el paradigma de periodo refractario psicológico (PRP), recientes estudios han hallado que la duración del procesamiento central influye en el orden en el que dos tareas son procesadas. En el presente trabajo se examinó si la duración de la respuesta también influye en el orden en el que dos tareas se ejecutan. Para este propósito, se utilizó una tarea de discriminación auditi...