To determine the extent of space error movement error and error in perception of length of a line. The instrument consists of a stand with a wooden block. The wooden block on the front has a thick straight line with a fixed arrow and two movable arrow pointers of the same length. The arrows are made in such a way that they act as open ended or closed embedded arrows. On the rear side of the block a wooden scale is embedded. A certain length of the line equal to the fixed line with the help of pointer. The error in perception is measured with the help of scale at the rear.

BhatiaBattery of Performance Intelligence Test.Norms available for 11 to 16 years. Bhatia's Battery of Performance Tests of Intelligence, is one of the popular tests of intelligence in India. Despite some of its limitations, such as that it has norms only between 69 to 131 IQ points.It includes cards with different patterns and the children are required to draw these patterns without lifting the pencil.This battery includes 10 designs from the original 17 designs from the Koh's test. The time for first five designs is 2 minutes and for the remaining five the time is 3 minutes.

This is an improved form of maze learning in whicherror committed can be objectively known. The apparatus has a wooden box. The top of the box has rows and columns of nail heads fixed. The nails are connected to a stylus, a speaker and a bulb. The subject is asked to trace the right path while moving the stylus through the nail heads. If going a wrong path the bulb will glow and a beep will be heard.

The division of attention board consists of a wooden boardwith a circular and triangular groove with a metallic contactpoint on each. The board is wired inside so that any passage of electric current on it from a battery can berecorded on an impulse counter. The board is connectedas its terminal to a battery. The other terminal of the battery is connected to a metallic stylus through an impulse counter impulse counter. Whenever the stylus passes through the metallic contact point the counter would record once.

The apparatus demonstrates the phenomenon of Habit Interference with the underlying fact that time taken to accomplish a practiced task is less than time taken to accomplish a new task. The apparatus consists of a tray with many numbered boxes and number indicating cards according to the number of boxes. Work to be done is to make the subject place the numbered cards in the same numbered box. Different situations can be created like the number of the boxes is in serial order or the number of the boxes can be jumbled. Or the subject is made to use right hand first and then left hand. Time taken in different situations is recorded.

There are two Bars One of these showing the Inspection Bar (I-Bar) having the fixed width the other one is known as Test Bar (T Bar) Mounted on a plate whose width may be increased or decreased through this nob 5 Test Bar available in Instrument.

The instrument consists of a rotating cylinder. Over the drum is a metallic screen concealing the drum from outside. The middle of screen has a window opening which allows view of small portion of drum. A list of syllables is pasted on the rotating drum. When drum is rotated, the window allows a convenient vision of one syllable at a time.

To determine the extent of space error movement error and error in perception of length of a line. The instrument consists of a stand with a wooden block. The wooden block on the front has a thick straight line with a fixed arrow and two movable arrow pointers of the same length. The arrows are made in such a way that they act as open ended or closed embedded arrows. On the rear side of the block a wooden scale is embedded. A certain length of the line equal to the fixed line with the help of pointer. The error in perception is measured with the help of scale at the rear.

BhatiaBattery of Performance Intelligence Test.Norms available for 11 to 16 years. Bhatia's Battery of Performance Tests of Intelligence, is one of the popular tests of intelligence in India. Despite some of its limitations, such as that it has norms only between 69 to 131 IQ points.It includes cards with different patterns and the children are required to draw these patterns without lifting the pencil.This battery includes 10 designs from the original 17 designs from the Koh's test. The time for first five designs is 2 minutes and for the remaining five the time is 3 minutes.

This is an improved form of maze learning in whicherror committed can be objectively known. The apparatus has a wooden box. The top of the box has rows and columns of nail heads fixed. The nails are connected to a stylus, a speaker and a bulb. The subject is asked to trace the right path while moving the stylus through the nail heads. If going a wrong path the bulb will glow and a beep will be heard.

The division of attention board consists of a wooden boardwith a circular and triangular groove with a metallic contactpoint on each. The board is wired inside so that any passage of electric current on it from a battery can berecorded on an impulse counter. The board is connectedas its terminal to a battery. The other terminal of the battery is connected to a metallic stylus through an impulse counter impulse counter. Whenever the stylus passes through the metallic contact point the counter would record once.

The apparatus demonstrates the phenomenon of Habit Interference with the underlying fact that time taken to accomplish a practiced task is less than time taken to accomplish a new task. The apparatus consists of a tray with many numbered boxes and number indicating cards according to the number of boxes. Work to be done is to make the subject place the numbered cards in the same numbered box. Different situations can be created like the number of the boxes is in serial order or the number of the boxes can be jumbled. Or the subject is made to use right hand first and then left hand. Time taken in different situations is recorded.

There are two Bars One of these showing the Inspection Bar (I-Bar) having the fixed width the other one is known as Test Bar (T Bar) Mounted on a plate whose width may be increased or decreased through this nob 5 Test Bar available in Instrument.

The instrument consists of a rotating cylinder. Over the drum is a metallic screen concealing the drum from outside. The middle of screen has a window opening which allows view of small portion of drum. A list of syllables is pasted on the rotating drum. When drum is rotated, the window allows a convenient vision of one syllable at a time.