Müller-Lyer Illusion Task
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A Müller-Lyer Illusion Task is an optical illusion judgement task that requires a judgement of which, if any, of two or more lines is longer.
- Example(s):
- “
Which of the two following lines with stylized arrowheads at their end is longer?">----< <----> >----<----> .
- “
- See: Optical Illusion, Human Judgement Task.
References
2014
- (Wikipedia, 2014) ⇒ http://en.wikipedia.org/wiki/Müller-Lyer_illusion Retrieved:2014-1-7.
- The Müller-Lyer illusion is an optical illusion consisting of a stylized arrow. When viewers are asked to place a mark on the figure at the midpoint, they invariably place it more towards the "tail" end. It was devised by Franz Carl Müller-Lyer (1857–1916), a German sociologist, in 1889. [1] [2] [3]
A variation of the same illusion (and the most common form in which it is seen today, see figure) consists of a set of arrow-like figures. Straight line segments of equal length comprise the "shafts" of the arrows, while shorter line segments (called the fins) protrude from the ends of the shaft. The fins can point inwards to form an arrow "head" or outwards to form an arrow "tail". The line segment forming the shaft of the arrow with two tails is perceived to be longer than that forming the shaft of the arrow with two heads.
- The Müller-Lyer illusion is an optical illusion consisting of a stylized arrow. When viewers are asked to place a mark on the figure at the midpoint, they invariably place it more towards the "tail" end. It was devised by Franz Carl Müller-Lyer (1857–1916), a German sociologist, in 1889. [1] [2] [3]