Level of detail especially important in lab settings

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Level of detail especially important in lab settings Have to ensure sessions are carried out consistently Documents design choices Setting Level of immersion Sampling strategy 99
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Capture Methods: Present Observer present Jottings => field notes Image recording (still photography) Audio recording Video recording 100
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Capture Methods: Not Present Instrumented software / logging behavior High quality capture Varied granularity: what utility? Diary studies Capture in moment Critical incident triggers User initiated recording (audio/video) Self-report problems Experience Sampling Method 101
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Issues with Recording Intrusive Increase observer effects (blinking red light syndrome) Robust data, able to recreate actual occurrences verbatim Reduce observer bias , allow others to “code” the data Increased marketability of results - help others to “see” Difficult preparation for analysis (esp. transcription) NEVER rely solely on recording for capturing your data! 102
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Ethics with Recording Public vs. private interactions – know the law! Dilemmas of Internet study Institutional Review Board approval of protocol Informed consent Ability to withdraw at any time Ability to stop recording at any time Ability to destroy recording Confidentiality of any captured data Judging – what if you don’t like what you see? Deception – when, if ever, is it valid? Intrusive / unobtrusive – when, if ever, is it okay to interject? 103
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Observation (DWR) Strengths Data gathered may be highly reliable. Can see exactly what is being done. Relatively inexpensive (compared with other fact-finding techniques). Can do work measurements (if needed). Weaknesses People may perform differently when being observed. Work may vary in difficulty and volume. Some activities may take place at odd times. The tasks being observed are subject to various types of interruptions.
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  • Fall '08
  • Koru,G
  • Project Management, Requirements analysis, John Walker, requirements gathering

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