Which of the following best describes a microgenetic study?

A microgenetic study is characterized by its focus on observing rapid changes in development as they occur over a short period of time. This method is used to capture the fine details of the learning process or the emergence of a particular skill by closely tracking participants during moments of significant change. Researchers typically conduct frequent observations and gather data at multiple points to provide a rich, temporal context for understanding how developmental transformations unfold.

This approach contrasts markedly with long-term observational studies, which typically look at changes over extended periods, as well as one-time assessments that do not provide ongoing insights into the process of development. Additionally, while a comparative analysis across different cohorts may provide valuable insights into developmental trends, it does not focus on the immediate, dynamic changes observed in an individual or a small group, which is the hallmark of microgenetic studies. Thus, the correct answer highlights the unique emphasis on the observation of rapid developmental changes as they occur in real-time.