Abstract: The subjects were 74 normal old people (40 males, 34 females) in theage range of 55-79 years. The subjects had to pass all the tests that includedvisual evoked potential (VEP), Wechsler Adult Intelligence Scale-Revised inChina (WAIS-RC), Clinical Memory Scale (CMS), the degree of encephala-trophy in CT,the degree of cerebral arteriosclerosis(D. O. C. A. )and bloodpressure. All the results recorded from the subjects were registered into thecomputer, the computer was used to make the analysis of variance, the multi-ple gradual regression and etc. The results showed that: Intelligence and memory were closely interrelatedwith VEP, D. O. C. A and blood pressure while there was little interrelationwith encephalatrophy. The formula to calculate the IQ and MQ in the olderpeople were also studied.

Key words: visual evoked potential(VEP), intelligence, memory, cerebral arteriosclerosis, multiple gradual regression