ABSTRACT
Humans spend a great deal of time deciding on which plan to execute and even when to develop a new plan. Plans are a routine human activity. A plan can be defined as a structured event series that generally contains one or more goals. Plans range from the short term and motoric (such as planning a sequence of key presses) (Pascual-Leone et al., 1993) to the long-term and cognitive (such as deciding on the steps required for air-traffic controllers to land a specific airplane) (Suchman, 1987). How plans are decided on has been the focus of study in artificial intelligence (AI) (Allen, Kautz, Pelavin, & Tenenberg, 1991; Hammond, 1994), cognitive science (Friedman & Scholnick, 1997; Hoc, 1988), and neuropsychology (Owen, 1997).
