. EVIDENCE-BASED GUIDELINES
Education researchers have identified some potential
problems in the use of animations and movies in teaching,
and have suggested guidelines for their use in multimedia
learning. [9,10]. Usually, Physclips is consistent
with these. For example, one study recommends minimising
the use of text in combination with moving visual
material [9]: the narration reduces this problem.
Some of these guidelines would be regarded by experienced
teachers as common sense. For instance, one recommended
tactic is called segmentation [10], i.e. breaking
the material up into digestible sections. Another tactic
is signaling, i.e. drawing attention to important information.
We do this in several different ways in Physclips,
such as highlighting with colour, or by temporarily reducing
other, competing information to grey or pale colours.
Another recommendation is spatial contiguity, locating
labels close to the objects labeled, rather than using a
legend. We give examples of these evidence-based guidelines
on the site [11].