Abstract: The key properties of the microgenetic method are dense observation and intensive trial-by-trial analysis in the whole process of cognitive change. This approach can yield detailed data about path, rate, breadth, source and variability of change, which is helpful for understanding cognitive developmental change mechanisms. Here some issues, such as the concept, design, rationality and shortcomings about the micorgenetic method are reviewed.

Key words: the micorgenetic method, cognitive change, dense observation, intensive trial-by-trial analysis.