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. Author manuscript; available in PMC: 2013 May 1.
Published in final edited form as: Cogn Psychol. 2011 Dec 21;64(3):127–160. doi: 10.1016/j.cogpsych.2011.11.001

Figure 2.

Figure 2

Speed–accuracy tradeoff functions for the Fan 1 and Fan 2 conditions in Wickelgren and Corbett (1977). Points denote data, solid lines denote ACT-R model predictions, and dashed lines denote shifted exponential function (SEF) predictions.