Abstract
Intelligence is defined by many people in different ways. Wechsler defines intelligence as the aggregate or global capacity of the individual to act purpose fully, to think rationally and to deal effectively with his environment. Intelligence can be measured by using verbal and/or performance scales. Performance scale is one in which language is used only in the instructions, or not at all when directions are given in pantomime. The main characteristics of the performance test is that a response to, or a solution of, the task does not require the use of language. These tests have proved most valuable when used with persons handicapped by language disabilities, such as the deaf, the foreign language speakers, the illiterate, and those who have speech or reading disabilities.
References
Freeman-Theory and practice of psychological testing.
Cronbach-Psychological testing.
Nunnally—Tests and Measurements.
Anne Anastasi-Psychological Testing-1976.
Guilford—Psychometric methods-1956.
Dunn-Exceptional Children in the schools-1964.
Dunn-Exceptional Children in the schools-1973.
Joseph D. Matarazzo-Wechsler's measurement and appraisal of Adult Intelligence.
Frank Coalman, Jerry E. Waters, Clifford I. Whipple-Psychometric Appraisal of Deaf Children using the Columbia Mental Maturity Scale-JSHD-1962, Vol. 27, p. 275.
Stanley Berlinsky—Measurement of the Intelligence and Personality of the Deaf-A Review of Literature, JSHD, Vol. 17, 1952, p. 39.
B.M. Abrol, Y.S. Vagrecha and K. Saxena-Assessment of intelligence in the patient population having impairment of hearing-Indian J. of M.R.-1973, Vol. 6, p. 75.
Henry E. Garrett-Statistics in Psychology and Education, 1966.