Although humans are the only species to possess language-driven abstract mathematical
capacities, we share with many other animals a nonverbal capacity for estimating quantities …

Symmetry is an important and prominent feature of the visual world. It has been studied as a
basis for image segmentation and perceptual organization, but it also plays a role in higher …

Humans share with many animals a number sense, the ability to estimate rapidly the
approximate number of items in a scene. Recent work has shown that like many other …

Despite the rapid growth of research on the crossmodal correspondence between visually
presented shapes and basic tastes (eg, sweet, sour, bitter, and salty), most studies that have …

When asked to estimate the number of items in a visual array, educated adults and children
are more precise and rapid if the items are clustered into small subgroups rather than …

Subjective similarity holds a prominent place in many psychological theories, influencing
diverse cognitive processes ranging from attention and categorization to memory and …

This review of symmetry perception has six parts. Psychophysical studies have investigated
symmetry perception for over 100 years (part 1). Neuroscientific studies on symmetry …

In four experiments we investigated the Solitaire illusion. In this illusion, most observers see
as more numerous a set of dots that forms a single central group, compared to dots on the …

Several non-numerical factors influence the numerical estimation of visual arrays, including
the spacing of items and whether they are arranged randomly or symmetrically. Here we …

Perceptual adaptation has been widely used to infer the existence of numerosity detectors,
enabling animals to quickly estimate the number of objects in a scene. Here, we …