Story, Dale                                                                                                                                                        7/13/15
POLS  3310

MEASUREMENT

• What is measurement?
• Numerals vs. numbers
• Measure the indicators not the concepts
  • Atomic Clock
    • Old atomic clock is only accurate to a few tens of quadrillionths of a second.
    • What is the "true concept" of a second? 9,192,631,770 Hz, a natural resonance frequency of cesium, which defines the length of the second in our modern world.
• Precision
• Levels
• Nominal
• Ordinal
• Interval
• Ratio
• Error
• Validity
• Systematic error
• Content/“Face”
• Criterion/Predicted
• Reliability
• Random (human) error
• Can we repeat the measure and find a similar result (measure twice, cut once)?
• Counting Votes
• Test-retest
• Parallel-forms
• Split-half