040604coop_decis

040604coop_decis - Research Methods & Experimental...

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Research Methods & Experimental Design 16.422 Human Supervisory Control April 2004
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Research Methods ± Qualitative vs. quantitative ± Understanding the relationship between objectives (research question) and variables is critical ± Information Data ± Information=data + analysis ± Planning in advance is a must ± To include how data will be analyzed
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Qualitative Research Methods ± ± Case studies ± Focus groups ± Observations ± Usability testing ± Can be quantitative ± Interviews ± Questionnaires
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Quantitative Research Methods ± Natural phenomenon ± Mathematical modeling ± Experiments ± Optimization ± Game theory ± Surveys ± Bottom line – statistics are a must
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Project Assignment ± Design and conduct an experiment in which you explore some measure of human performance through testing, analyze the results, and discuss the broader implications. ± Design an actual display that uses automation for decision support… While formal experimental testing is not required, a small group of users should be used to identify problems with the design to include functionality evaluation as well as recommendation for future improvements and systems integration.
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The Experimental Design Process Research Question (Hypothesis) Design Experiment Collect Data Analyze Data Draw Conclusions
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Experimental Design ± Design of Experiments (DOE) defined: ± A theory concerning the minimum number of experiments necessary to develop an empiricalmodel of a research question and a methodology for setting up the necessary experiments. ± A parsimony model ± Human subject vs. object experimentation ± Other DOE Constraints ± Time ± Money
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Experimental Design Basics ± Two kinds of data gathering methodologies ± Observation ± Can’t prove cause & effect but can establish associations. ± Hawthorne effect, social facilitation ± Experimental ± ± Variables of interest – factors vs. treatments ± Independent variable ± Treatment – manipulations of variables of interest ± Treatment vs. control group ± Dependent variable is what you are measuring
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More Basics ± Confounds ± Randomization Concerns ± Randomization prevents experimental bias ± Assignment by experimenter
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040604coop_decis - Research Methods & Experimental...

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