In two experiments, we examined whether word age-of-acquisition (AoA) is a reliable predictor of processing times in semantic tasks. In the first task, participants were asked to say the first associate that came to mind when they saw a stimulus word; the second task involved a semantic categorisation between words with a definable meaning and first names. In both tasks, there were significantl...

We examined the effect of mimicry on how 16-month-old infants learn by observation a novel tool use action, which consisted of using a rake to retrieve a toy. Across four conditions, we manipulated whether during an initial play phase, an adult mimicked the infant's play or not (testing the effect of mimicry), the infant played with the adult or played alone (controlling the effect of interacti...

The perception of social information is crucial for the survival of most animal species. Two recent studies demonstrate the joint contribution of innate mechanisms and perceptual experience to two aspects of social perception--faces and biological motion. Together, they highlight how important it is to consider faces and biological motion as different visual properties used by a broader social ...

After relatively rapid population growth in the later sixteenth century and slower growth in the first four decades of the seventeenth century, the midseventeenth century nationally saw growth change to stagnation and even loss. Falling fertility, changes in nuptiality or worsening mortality, or a combination of all these, could have caused this phenomenon. The aim of this article is to examine...

Recent evidence suggests that 3-year-olds can take other people's visual perspectives not only when they perceive different things (Level 1) but even when they see the same thing differently (Level 2). One hypothesis is that 3-year-olds are good perspective takers but cannot confront different perspectives on the same object (Perner, Stummer, Sprung, & Doherty, 2002). In 2 studies using color f...

This paper draws on evidence from a local Sure Start evaluation of low participation rates among ethnic minority families. It reflects national concerns regarding the low use of children's services among ethnic minority families. The evaluation aimed to improve understanding of the factors that affect families' participation in Sure Start services. A sample of 34 ethnic minority parents, six Su...

A recent meeting to evaluate the state of the art of protein structure prediction saw progress on all fronts; for prediction methods based on comparative modeling or fold recognition, the progress was incremental, but in the case of ab initio structure prediction, some surprising successes were reported.

BEHAVIOR IS THE RESULT OF the interaction between genes and the environment. In earlier chapters we saw how genes influence behavior. We now examine how the environment influences behavior. In humans the most important mechanisms by which the environment alters behavior are learning and memory. Learning is the process by which we acquire knowledge about the world, while memory is the process by...

Subjects saw kinetic depth displays whose shape (sphere or cylinder) was defined by luminous dots distributed randomly on the surface or in the volume of the object. Subjects rated perceived 3-D depth, rigidity, and coherence. Despite individual differences, all 3 ratings increased with the number of dots. Dots in the volume yielded ratings equal to or greater than surface dots. Each rating var...

Historians of chemistry usually associate the eighteenth century with the Chemical Revolution, but it could just as readily be called 'the century of gases' (or 'airs', as they were called in the eighteenth century). In the early part of the century, the British pneumatic chemists struggled to replace the traditional notion 'Air', understood as an inert chemical element, with the concept of 'ai...