**Figure
S15: Definition of latency and parameter dependency
**

**A**.
We followed the definition of latency used in Thorpe et al., 1996. At each
time point, we computed a one-way ANOVA on the IFP signals across object
categories. For the example electrode shown in the top part (same electrode
shown in Figure 1**F**),
we show the point-by-point *p *values
in the bottom figure (in log scale). An electrode was defined as “selective” if
there was a period of *sel**n**cons** *= 25 consecutive time points (bin size = 2 ms) with *p*<0.01.
The response latency was defined as the first time point where *lat**n**cons** *10 consecutive points yielded *p*<0.01.
The latency for this electrode is indicated by an arrow and the shaded area
shows the interval of consecutive points where *p*<0.01.
The y-axis was cut at *log(**p)=-6 *for graphic purposes; the log(p) values between ~200 and ~300
ms were below -6. The distribution of latency values for all the selective
electrodes is shown in Figure 3**A **in
the main text. **B, C**.
Dependence of the mean latency on *lat**n**cons**, **lat**n**cons** *and *p *value
threshold. The horizontal dashed line shows the mean value reported in
the text (the mean of the distribution in Figure 3**A **which corresponds to the parameters indicated by the arrow
in the fifth subplot). The color corresponds to the *p *value thresholds (red: 0.05, green: 0.01, blue: 0.005,
black: 0.001). The error bars correspond to one SEM of the corresponding
distribution across electrodes.

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