Question

Pedro took a timed vocabulary test multiple times over the course of a month. Each time, he got faster at completing the test. Which memory improvement technique did Pedro use to achieve this progress

Answer 1

Pedro who took a timed vocabulary test multiple times over the course of a month and as a result each time, he got faster at completing the test means that he used the recall/retrieval memory.

Recall because Pedro retrieved the information  from memories and recognition, because the presentation of a familiar outside stimulus provided a cue that the information has been seen before.

Answer 2

The process used is the recall/retrieval memory

It refers to the mental process of retrieving information from the past and it involves both storage and encoding of data.