Hills are judged to be steeper with a verbal measure (in degrees) than with a motor
measure. Traditionally, studies of slope estimation have used relatively long distances …

In 4 experiments, the authors varied the extent and nature of participant movement in a
virtual environment to examine the influence of action on estimates of geographical slant …

Perceived slant is grossly overestimated, such that 5° hills look to be about 20°. However,
overestimation is found only in visual and verbal measures of apparent slant; action …

Hills often appear to be steeper than they are. The unusual magnitude of this error has
prompted extensive experimentation. The judgment mode, such as verbal vs. action-based …

In two recent issues of Acta, the widely accepted view of Proffitt (2006), that 'haptic'measures
of perceived geographical slant are generally accurate, and dissociated from explicit …

The geographical slants of hills are known to appear quite exaggerated. Here, we examine
the visual and haptic perception of the geographical slant of surfaces within reach under full …

The overestimation of geographical slant is one of the most sizable visual illusions.
However, in some cases estimates of close-by slopes within the range of the observer's …

We argue that the experimental conditions in the Durgin et al.(2009) study were so different
from those in Bhalla and Proffitt (1999) that the results of the former study cannot be …

People have a variety of sources of information (cues) about surface slant at their disposal.
We used a simple placing task to evaluate the relative importance of three such cues …

When observers face directly toward the incline of a hill, their awareness of the slant of the
hill is greatly overestimated, but motoric estimates are much more accurate. The present …