Acute angles and long lines are more complex than obtuse angels and sh
ort lines. This source of complexity is called metrical information, f
or which a measure was proposed by Leeuwenberg (1982). According to th
is measure, the metrical information of a static pattern is specified
as the sum of the mechanical impulses necessary to move an object acco
rding to this pattern. The perceptual relevance of this metrical load
was tested in an experiment in which judged complexities were gathered
for a number of simple line patterns.