Positive connectivity decreased with Aori (p < 0.005 in each of the five sites, t-test on the logistic regression coefficient) whereas negative connectivity did not decrease (Fig.

7 G): The slope in the logistic model of connectivity with respect to Aori was significantly higher for positive than for negative interactions (p < 0.04 in each of the five sites, two-sample t-test of the difference of the logistic regression coefficient).

Positive connectivity decayed with distance (p < 10—6 in each of the five sites for positive interactions, t-test on the logistic regression coefficient in normalized data) (Fig.

Our main analyses regarded participant’s choice behavior, but a detailed analysis of response times and a logistic regression of choices were also performed (see 81 Text; 81 Fig).

A logistic regression of participant’s choices furthermore showed that costs and magnitudes both influenced choices (81B Fig.

B, Mean (i SEM) parameter estimates from a logistic regression analysis of each participant’s choice pattern.

B, To illustrate that the percentage of choices explained by a model depends on the offered choice stimuli (see Results), we repeated the model fitting and logistic regression analysis on the highlighted subset of trials which was defined as choices in which (a) both options were in the lower cost range, with at least one option with cost <02, and the difference to the second option not higher than 0.3, or (b) both options were in the higher range of cost levels (both costs>0.4).