Instructional design models have been criticized for being too inflexible and taking too long to follow to be useful in today's fast-paced environment. As a result, some have rejected instructional design. This article offers an alternative view of instructional design as flexible and able to be accomplished in much shorter time periods than…

Unexpected interruptions introduced during the execution phase of simple Tower of London problems incurred a time cost when the interrupted goal was retrieved, and this cost was exacerbated the longer the goal was suspended. Furthermore, time taken to retrieve goals was greater following a more complex interruption, indicating the processing…