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Taking A Look At Original Signal Detection Theory

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Original Signal Detection Theory was developed for psychological tasks, disassociated from the justice system. The task involved individuals to wear headphones in a soundproof room that were instructed to individuals to identify whether the noise heard through there headphones was a signal, (beeping noise), or a white noise plus a fine noise. In other words, the objective for each participant in each test trial to say whether the test trial presented was a noise or a signal. Aside from participant studies, the Signal Detection Theory has been found useful for decision-making and legal procedures. Consider juror members, their whole purpose is to decide whether a defendant is guilty or innocent of the crime charged by the prosecutor. Just like …show more content…

When conducting basic data, if the participant responds and states that its a signal, and in fact it is, then we would call that a “hit”. If the participant responds to a “signal”, and states that it is a “noise”, we would call this a “miss”. In addition, if the participant responds to a signal with “noise”, this is called a false alarm. Lastly, if the participant responds to a noise with “just a noise”, this is called “correct rejection”. For Eyewitness Identification, the labels will be altered as Correct Identification and False Identification for “Present” and “Absent” suspects, but the answers “Hit, False Alarm, Miss, and Correct Refection, remain the same. For Present Lineup person that are a “Hit” are called a Correct Identifications. For Present Lineup person that are not identified are called a “miss”. Absent Lineup that was Identified as Present is referred to as a False Alarm, in other words as a False Identification. As an Absent Lineup Member who is identified as Absent is referred to as a Correct Refection. As stated in the Introduction, the way the decision-making in Jury is made is presented the same way within their graphs. For the a defendant that truly guilty, and the juror rules a guilty verdict, this called a correct conviction (other words, a “hit”, like a signal-detection procedure). For a defendant that is

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