Chapter 7 Measuring Instruments

ALL VARIABLES ARE NOT MEASURED THE SAME  Nominal Variables  Ordinal Variables  Interval Variables  Ratio Variables

QUESTIONS TO ASK BEFORE MEASURING A VARIABLE  Why Do We Want to Make the Measurement?  What Do We Want to Measure?  Who Will Make the Measurement?  What Format Do We Require?  Where Will the Measurement Be Made?  When Will the Measurement Be Made?

TYPES OF MEASURING INSTRUMENTS  Journals or Diaries  Logs  Inventories  Checklists  Summative Instruments

STANDARDIZED MEASURING INSTRUMENTS  Locating Standardized Measuring Instruments –Publishers –Professional Books and Journals