Fig. 2.
SmI distribution from the population of neurons and quantification of the putative MAX responses. A: SmI distribution contains 54 values [22 in caudal mesopallium (CM) and 32 in caudo-medial nidopallium (NCM)] from 39 cells in 17 birds. The histogram is truncated at SmI = 3 for comparison with a similar distribution in Lampl et al. (2004). Inset: chart showing all the 54 SmIs, partitioned into those <1 (blue) and those >1 (red). B: measured responses RA+B plotted against RA+B predicted by the linear sum (+), arithmetic average (▼) and the MAX models (●) for the nine SmI values closest to zero in A. The dashed line represents the diagonal (also in the inset). Inset: normalized squared error SE between the predicted response and the measured response for the MAX model plotted against SE for the arithmetic average model (the error for the linear sum model was 10 times greater that that for the average model and is not shown).