Psychology

Product Details:

A division of attention apparatus to show that if a job is done one at a time efficiency is more and if more than one jobs are performed simultaneously efficiency is reduced. The apparatus has three vertical rods erected straight on a wooden base and there are black and white discs placed in the central rod. The individual is asked to put black discs in the left rod and white discs in the right rod with left hand. Time taken is recorded. Now if the same individual is asked to repeat the same exercise with left hand and do some writing with the right hand, it is noticed that the efficiency is remarkably reduced.

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Colour preference on the basis of paired comparison method. The sample colour is visually matched in the comparator instrument against graded coloured glass filters test discs. A wide selection of discs is available. 

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This instrument is a square box made up to wood. In the back ground of this is an electric bulb and in the front part there  is an aperture type empty space, through which opaque glass slides fixed with different stimulant colours in part in the middle, is shown. Bulb inside the instrument is switched on when the stimulant colour is presented. Instrument is covered by a grey colour curtain.

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The division of attention board consists of a wooden board with 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 be recorded on an impulse counter. The board is connected as 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.

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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.

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This is simple instrument to check similar sensation at varying lengths. It is essentially a caliper, the jaws of which has two pointed extensions. When the caliper is closed and the extended jaws are touched firmly on forearm of a person who has been asked to close eyes, it gives feeling of a single point touch. Even when the jaws are slightly opened the feeling remains the same. Only at a significant distance does the subject realizes the touch as two point.

Product Details:

This is also called Reaction Time Apparatus. It consists of two parts : 1. Reaction time 2. Chronoscope, The reaction time apparatus is a wooden board with screen in the middle. On one side of the screen (subject's side) there are four different colored lights and a press key. The key is connected to the lights. If the key is pressed while the light is on, the circuit will break and the light will go off. The other side (experimenter side) has key which serves to switch on the lights on the subject side. Along with this a buzzer is also fixed on the experimenter side. The experimenter can switch on or switch off the lights or ring the buzzer. Chronoscope is an electrically operated timing instrument which measures very short intervals of time. Whenever the experimenter switches on the lights or the buzzer, the chronoscope starts working and when the subject responds, the chronoscope stops. The reading of the chronoscope gives the reaction time.

Product Details:

This consists of a circular metallic disc graduated into different degrees and operated by a motor in a concealed box-like arrangement. The speed of the motor is adjustable. Colour discs of red, green, Blue and yellow. The discs are cut in such a way along the sector that they can all be slipped into each other.

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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.

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An instrument to determine optimal distance and time interval for occurrence of Phi Phenomenon Apparatus. It consists of a wooden box having arrangement of a pair of lights in shape of dots and arrows. The distance between a pair of light can be adjusted and recorded with the help of two knobs that slide over a scale. The flickering of the light can be varied with the help of an arrangement provided on front panel. There is a window at the rear to observe the lights. When a subject is made to observe two lights at a particular frequency, the distance is so varied that at a particular distance the two lights appear a continuous light. The experiment is repeated at different frequencies and with different shape of light.

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The three needle apparatus has been widely used in studies of Depth Perception Apparatus. This consists of an elongated box which conceals inside three vertical rods or pins. These pins can be seen by a subject through a small window and the inside of the box is illuminated. Two of these rods are fixed and the one in the middle is movable,resting on a pulley bottom wheeled on a rod running completely across the length of the box. A meter -scale is fixed to the groove like opening on the top so that the exact position of the movable rod can be read.

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To study the nature as well as progress in learning throughmaze. The apparatus consists of a wooden block and hasgrooved tracks. There are three tracks out of which only one leads to the aim. Time taken in first attempt to reach the aim is more but once practised, and if repeated again time taken to reach the target is much less.

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This is an improved form of maze learning in which error 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.

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This device examines the steadiness of the hand and the fingers. There is a box, on one side of which there are some holes arranged systematically so that they proceed from the widest to the smallest. The subject takes an instrument called the stylus into his hand and inserts it completely and draws it out of these holes successively and Impulse counter available.

Product Details:

For comparative study of right hand and left hand finger dexterity of a person. It consists of a wooden box containing 100 holes. There are pins kept separately to be placed in these holes. While keeping the apparatus on the right side of the subject, he/she is asked to insert pins in the holes with right hand. Time taken and errors committed are noted. Same procedure is repeated with left hand keeping the instrument to the left hand side of the subject.

Product Details:

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.

Product Details:

Weight Discrimination Box if a blindfolded subject is given two similar shaped weights and asked to compare, he/she can differentiate better if the difference is more. However if the difference between the weights is gradually reduced at one point the subject fails to differentiate between two weights. It consists of a box with a no. of cylinders having different weights in ascending.