Figure 7.

Excess of bidirectional connections and connected triplet motifs is highly correlated with biconditional discrimination task performance across networks. (A–D) Each data point represents results for a single network. 4 instantiations of each of 25 configurations with each plasticity mechanism: LTPi alone, red circles; LTPi with triplet-STDP, blue crosses; triplet-STDP alone, green plus signs; no functional plasticity, black dots. All networks incorporate homeostasis and structural plasticity. Networks with high stimulus selectivity (averaged over cell responses) produce (A) excess bidirectional connections and (B) excess connected triplets. The average reward per trial, is highly correlated with numbers of (C) bidirectional connections and (D) connected triplets (see Table 5). Networks trained for 2000 trials of the biconditional discrimination task.