Answer: <em>Visual aids </em>are most effective when information is kept to a minimum.
Explanation: Visual aids are basically any visual objects that can complement some given or delivered information. Also, visual aids can also be used in learning, i.e. information transfer to students. According to psychologists, visual representations, i.e images are those information that the human brain first registers and creates an impression based on them, after that based on written information, sound, etc. Visual aids contribute to the students' retention of the displayed information, much easier than the written information.