“…The activities that are degraded by verbalization include insight problem solving, but not noninsight problem solving (Schooler & Melcher, 1994;Schooler, Ohlsson, & Brooks, 1993). Davies (1995), discussing an experiment on software design, and Lloyd, Lawson, and Scott (1995), discussing an experiment designing a bicycle rack, present evidence that verbal protocol experiments distort normal design behavior. Visser (1992), in her discussion of the applicability of protocol analysis methodology to design, notes that Ericsson and Simon (1980) remark that "producing verbal reports of information directly available in propositional [i.e.…”