1. Human Factors Research Methodologies Chap 2

2. Human Factors Research Methodologies  An Overview    Choosing A Research Setting    Selecting Variables    Choosing Subjects    Collecting the Data  Analyzing the Data  Criterion Measures in Research  

3. An Overview  Descriptive Studies Certain attributesCertain attributes Basic data: design decisions be based uponBasic data: design decisions be based upon Assess the magnitude and scope of a problemAssess the magnitude and scope of a problem  Experimental Research test the effects of some variable on behavior test the effects of some variable on behavior  Evaluation Research Comparison with its goalsComparison with its goals Intended consequences & unintended outcome Intended consequences & unintended outcome Often include benefit-cost analysisOften include benefit-cost analysis

4. Choosing A Research Setting Field vs. Laboratory Field vs. Laboratory  Descriptive Studies  Experimental Research Simulation: physical simulation Simulation: physical simulation computer simulation computer simulation  Evaluation Research Representative: ultimately be used Representative: ultimately be used

5. Selecting Variables  Descriptive Studies Criterion variablesCriterion variables  Physical characteristics  Performance data  Subjective data  Physiological indices Stratification (Predictor) variables: sampleStratification (Predictor) variables: sample  Experimental Research  Evaluation Research (cont.)

6. Selecting Variables  Experimental Research Independent variablesIndependent variables  Task-related variables equipment v. & procedural v. equipment v. & procedural v.  Environmental variables  Subject-related variables Dependent variablesDependent variables performance data, subjective data, performance data, subjective data, physiological indices physiological indices  Evaluation Research Goal & Objective of the System → Criterion v. Goal & Objective of the System → Criterion v.

7. Choosing Subjects  Representative: relevant aspect  Sample Size

8. Collecting the Data  Descriptive Studies  Experimental Research  Evaluation Research

9. Analyzing the Data  Descriptive Studies  Experimental Research  Evaluation Research

10. Criterion Measures in Research  System-Descriptive Criteria  Engineering aspects  Task Performance Criteria  Quantity of output  Quality of output  Performance time (cont.) (cont.)

11. Criterion Measures in Research  Human Criteria  Performance measures frequency, intensity, latency, duration measures frequency, intensity, latency, duration measures reliability reliability  Physiological indices  Subjective responses  Terminal vs. Intermediate Criteria Intermediate: diagnosing and explaining Intermediate: diagnosing and explaining performance inadequacies performance inadequacies