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Signal Detection Theory (SDT)

Signal Detection Theory (SDT). Powerful tool to distinguish facts from bias in decision making. Task : Detect something. e.g., WMD. Signal Detection Theory (SDT). Signal = WMD …. Are they there?. Or not?. Evidence?. -vs- Bias?. Many ap plications of SDT:

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Signal Detection Theory (SDT)

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  1. Signal Detection Theory (SDT) Powerful tool to distinguish factsfrom bias in decision making Task: Detect something e.g., WMD

  2. Signal Detection Theory (SDT) Signal = WMD … Are they there? Or not? Evidence? -vs- Bias?

  3. Many applications of SDT: Can use when you are trying to detect something. Perceptual tasks (e.g., detecting a light or sound) 2. Social Psych (e.g., detecting a type of person) 3. Real world phenomena (e.g.,WMD..)

  4. Our Decisions are affected by: Signal strength & quality Our biases

  5. Watch out for Noise! Sometime stuff looks like a signal But it’s not. e.g., sometimes trailers for monitoring weather can be mistaken for trailers used to produce WMD

  6. Is the signal (WMD)present? Correct Response

  7. Is the signal (WMD)present? Incorrect Response

  8. 4 Types of Responses • Correct: • Hits • Correct Rejection • Incorrect: • False Alarm • Miss

  9. (Pre-) 9/11 *

  10. Post-9/11 *

  11. Try the SDT demo… http://stori.uww.edu/psych305/SDT.swf Many thanks to David Delgado from UWW-LTC for his help w/ constructing the critical dynamic features

  12. D2L + DIY = ? Combining e-resources a) Limitless possibilities in e-teaching b) Effective e-teaching c) Maximize student learning d) Complexity in e-teaching e) Confusion in e-teaching **f) All of the above

  13. Future directions to keep in mind…. • Maximize effective teaching • Maximize ease of use • Import from specialized applications

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