Kelley S. Parsons

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OBJECTIVE Our objective is to provide thumb reach envelopes to help guide the placement of controls on handheld devices and to provide useful methods to gather and analyze thumb reach data. BACKGROUND With the proliferation of handheld, interactive devices, such as cameras, mobile phones, game systems, and remote controls, human factors professionals(More)
OBJECTIVE We examined the effects of knowledge of results (KR) on vigilance accuracy and report the first use of positive and negative predictive power (PPP and NPP) to assess vigilance training effectiveness. BACKGROUND Training individuals to detect infrequent signals among a plethora of nonsignals is critical to success in many failure-intolerant(More)
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