gida drawings analysis collage network 
coding scheme 
related work design studies classifications graphic systems current stage discussion acknowledgment thanks
Related Work - Design Studies.
Think-aloud Protocol Analysis
(Eastman 1968, Akin 1978)
(Chan 1990, Cross, Christiaans et al. 1996)
Reflection-in-Action Observations
(Schon 1988, Schon & Wiggins 1992)
(Goldschmidt 1989, 1991)
Retrospective Reports
(Galle & Kovacs 1992, Suwa & Tversky 1996)
Speculative Thought Experiments
(Porter 1988)