In experiments in which participants manually tracked a complex pattern that consisted of two segments that were random patterns on every trial and one segment that was the same every trial, the results showed that the participants improved

Explanation:

The complex pattern in an experiment were manually tracked by the participants. The pattern includes two segments where on every trail there are random patterns whereas the other segment has the same pattern on every trial. The reports of results by the participants showed that the participants improved more on repeated segments when compared to two random segments. The participants were also not aware the one segment was same on each trial.

answer; the president uses mass media to gain support for policies;