By convention, the all-minuses configuration is not considered a run, since it has no bordering pluses.
The 1 values encode the decision 'cooperate' and are referred to as pluses.
As expected, the proportion of successful answers (pluses in the table) is lower when this stricter evaluation criterion is applied.
Pluses and minuses must alternate, since the path will alternate between hemispheres.
To highlight the valence distribution, all components but the pluses and minuses have been removed from the diagram.
When this edge is chosen, both minuses in the pair become pluses.
When any internal edge is chosen, the run r is split into two runs which are separated by two pluses.
Whatever system is put in place will not be perfect and there will always be pluses and minuses.
