SIZE CONSTANCY - A TENDENCY TO CHANGE VIEWING DISTANCES. AN IMAGE DOUBLES IN SIZE WHENEVER ITS DISTANCE IS HALVED. The brain compensates for this. A test - look at your hands, placed at arms length, draw one hand closer to you by bending your elbow - the hands continue to look the same size, even though the furthest away hand is half the linear size. Now let the nearer hand overlap the other and you will see the difference in size - the hand nearest to you covers the other hand........ even though you know they haven't change size, just their position. (This was first identified by DESCARTES)
SIZE CONSTANCY - A TENDENCY TO CHANGE VIEWING DISTANCES.
AN IMAGE DOUBLES IN SIZE WHENEVER ITS DISTANCE IS HALVED. The brain compensates for this.
A test - look at your hands, placed at arms length, draw one hand closer to you by bending your elbow - the hands continue to look the same size, even though the furthest away hand is half the linear size. Now let the nearer hand overlap the other and you will see the difference in size - the hand nearest to you covers the other hand........ even though you know they haven't change size, just their position. (This was first identified by DESCARTES)
http://www.users.totalise.co.uk/~kbroom/Lectures/3gs.htm
Which has a lot of interesting stuff about visual perception. Maybe it's because I'm a Londoner - that I moved to Nice.
