Algorithmic indexes.

<p><i>Horizontal</i>: number of moves. <i>Vertical</i>: execution time (normalized). <i>A</i>: unbounded memory, U(N). <i>B</i>: bounded memory, B(N), I(task) (grey zone) and I(N), i.e., average of I(task), <i>C</i>: detail: all indicators together, N< = 4. According to Shallice (1982), with 4 moves or more, the supervisory attentional system is engaged.</p>