#redirect [[Problem solving#Common barriers to problem solving]]
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</ref>German, T. P., & Defeyter, M. A. (2000). Immunity to functional fixedness in young children. ''Psychonomic Bulletin & Review'', ''7''(4), 707-712. Retrieved from http://search.ebscohost.com.ezproxy.biola.edu/login.aspx?direct=true&db=psyh&AN=2001-14334-015&login.asp&site=ehost-live</ref>
</ref>Kershaw, T. C., & Ohlsson, S. (2004). Multiple causes of difficulty in insight: The case of the nine-dot problem. Journal of Experimental Psychology: Learning, Memory, and Cognition, 30(1), 3-13. doi: 10.1037/0278-7393.30.1.3</ref>
</ref>Nickerson, R. S. (1998). Confirmation bias: A ubiquitous phenomenon in many guises. ''Review of General Psychology'', ''2''(2), 175-220. doi:
10.1037/1089-2680.2.2.175</ref>
</ref>Ollinger, M., Jones, G., & Knoblich, G. (2008). Investigating the effect of mental set on insight problem soving. ''Experimental Psychology'', ''55''(4), 269-282. doi: 10.1027/1618-3169.55.4.269</ref>
</ref>Wiley, J. (1998). Expertise as mental set: The effects of ___domain knowledge in creative problem solving. ''Memory & Cognition'', ''24''(4), 716-730. Retrieved from http://search.ebscohost.com.ezproxy.biola.edu/login.aspx?direct=true&db=psyh&AN=1998-10386-011&login.asp&site=ehost-live</ref>
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