§ Binet
was the father of Intelligence test –German psychologist
§ Wilhelm
stern, was the first man to formulate the concept of IQ in 1912.
§ Today
IQ is the generally accepted means of expressing intelligence
§ IQ
represents the ratio of mental age to chronological age or the rate of mental
development compared to age
§ It
varies from child to child in the same age group
§ Example:
a child of 8 whose M.A is 10has an IQ of 125.
§ IQ
=MA/CA*100
§ M.A
= Mental Age
§ C.A
= Chronological Age
§ Individual
have been classified into different categories according to the IQ possessed by
them
IQ
distribution
0-20 Idiots
20-50 Imbeciles Retatded (1%
50-70 Morons
70-80 Border Line (5%)
80-90 Backward (14%)
90-110 Average (60%)
110-120 Superior (14%)
120-140 Very superior (5%)
140
> Genius
(1%)
Types of IQ test
Classification based on method of testing
§
Individual test –Only one
individual at the same time
Ex: Stanford –Binet Test, Wechsler Adult Intelligence
scale, Bhatia Battery of Performance
§
Group test – a group of
Individual is tested at the same time
Ex:
A nonverbal group test of intelligence for secondary school by sukumaran Nair
Classification based on Medium of testing
§
Verbal Test- they make use of
language
Ex: Stanford- Binet Test, Army Alpha test – lews
Termin
§
Non- verbal Test – they make use
of some activity or performance
Ex:
The ravan’s Progressive Matrices – John .C. Ravan-1936
Verbal Test
§ A
test which requires the use of verbal ability- Ability to read, write and
understand words- of the subject is called Verbal test.
§ It
requires language ability
Merits
§ Administration
and scoring easy
§ less
time consuming
§ Less
expensive
§ Prepared
easily
Demerits
§ Proficiency
of language may influence test scores
§ Need
Language ability
§ Not
suitable for young children.
Non- Verbal Test
§ These
test involve activities and not need language ability
§ Items
of nonverbal tests are in the form of symbols, diagrams, perceptual designs or
even concrete objects.
Performance Test
§ A
performance test is one which the subject has to perform certain standardized
tasks or manipulate some concrete materials without use of language.
Merit
§ Most
useful for deaf, dumb, illiterate
§ Not
need Language ability
Demerit
§ Costly
§ Standardization
of performance test is difficult
§ Time
consuming
***************
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