001-MI-(1 Set includes 1 Mullerlyer illusion board with a set of stands and administrator manual)
Muller Lyre Illusion Board (with stand) (Performance)
This instrument is generally used to study the phenomenon of optical illusion. This is a board having a fixed line with an arrowhead and feather head for a specific length and a movable feather head. The length of the line with the feather heads can be varied sliding front and back. A metric scale is provided to measure the extent of estimation.