Examples of – are when researchers study a single case extensively in order to extract as much data as possible. Then – are similar in that they treat each individual as a separate experiment, but instead of a single case, they use a few participants. And last, – recruit many participants and are concerned with the data of the sample as a whole.

single-N, small-N, large-N

Explanation:

These are the words that best fill in the blanks. These are all different types of research design.

Small-N designs focus on relatively few subjects, and studies them in-depth. In this type of research, each participant is in a separate experiment, and researchers observe how the subject responds in different conditions.

Large-N designs are designs in which participants are grouped, and the data of individual participants is not as important as the data of the group, which is analyzed using statistics. Some examples of this are correlational studies and randomized control trials.