• The Concept of Control
  • What is an Extraneous Variable?
  • Control Conditions in mycin: A Case Study
• Four Spurious Effects
  • Ceiling and Floor Effects
  • How to Detect Ceiling and Floor Effects
  • Bounding Performance
  • Regression Effects
  • Order Effects
• Sampling Bias
• The Dependent Variable
• Pilot Experiments
• Guidelines for Experiment Design
• Tips for Designing Factorial Experiments
• The Purposes of Experiments
• Ecological Validity: Making Experiments Relevant
• Conclusion