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. Author manuscript; available in PMC: 2011 Jun 21.
Published in final edited form as: Neuropsychologia. 2010 Dec 21;49(6):1622–1631. doi: 10.1016/j.neuropsychologia.2010.12.023

Figure 2. Distribution of errors relative to target feature values.

Figure 2

(a) Frequency of response as a function of the deviation between reported and target feature values in the low-load (1 object) condition: for color (top), orientation (right), and conjunction of both features (heat map). Colored lines indicate the response probabilities predicted by a mixture model combining a gaussian distribution centered on the target value and a uniform distribution spread equally across the response space.

(b) Error distributions plotted as in (a) for the high-load (6 object) condition.

(c) Predicted distributions of color and orientation responses under conditions of full correlation (top) and full independence (bottom) between feature dimensions. Compare with the observed distribution of errors shown in (b).

(d) Proportion of trials on which both responses are centered on target values (TT); both are uniformly distributed (UU); the orientation response is centered on the target and the color response is uniform (TU); and vice versa (UT). Estimates obtained by fitting a mixture model to observed responses are shown along with predictions under full correlation and full independence models.