Which study aims to analyze the effectiveness of intervention methods in managing aggression among toddlers?

The most suitable choice for analyzing the effectiveness of intervention methods in managing aggression among toddlers is a longitudinal developmental study. This type of study involves observing the same subjects over a period of time to assess changes and developments, which is ideal for understanding how aggression in toddlers evolves and responds to various interventions.

Longitudinal designs allow researchers to track the same children as they grow and undergo different intervention methods, providing insights into both the short-term and long-term effects of specific strategies used for aggression management. This approach can reveal trends and patterns that might not be visible through other study types, making it particularly valuable in developmental research concerning toddlers.

In contrast, a qualitative case study might focus on a single instance or a small group and provide in-depth insights but wouldn’t offer broad assessments of effectiveness across different interventions. A quantitative observational study would involve measuring behavior without manipulating variables, limiting its capacity to assess intervention effectiveness directly. Lastly, a comparative analysis of methods typically contrasts different strategies but may not comprehensively explore their effectiveness over time within a defined developmental context. Thus, the longitudinal developmental study is the most appropriate choice for this research aim.