Testing Instruments are used to test Intelligence Quotient or personality tests to evaluate past-acquired competencies or future success in education or employment. A close examination and study of human cognition based on biological and anthropological evidence such as plasticity of brain we may have to include more universal set of competencies than ordinarily been considered such as verbal, mathematical and logical competencies. This paper attempts to address issues relating to definition of intelligence, its components and application of study for educational testing and selection process.