TOOLS AND TECHNIQUES OF ASSESSMENT OF LEARNING Characteristics of Good measuring Instrument : Essential Qualities: Like a good tool or a machine, a good measuring instrument must meet certain minimum requirements before it is deemed to be reliable. What are the essential characteristics and requirements of a good measuring instrument? These are planning, validity, reliability, objectivity, discriminating power, adequacy, practicality, comparability and utility. All of these qualities are criteria that must be given serious thought when a teacher selects a measuring instrument. Any good measuring too should possess certain characteristics. So, evaluation technique is judged for its adequacy efficiency and consistency as measuring device on the basis of commonly accepted qualities. These are Validity, Reliability, Objectivity and Usability or Practicability. 1. VALIDITY: ...
