Observational techniques are a way of studying things without changing them or interfering in any way. It is like watching and taking notes. Scientists use observational techniques to study nature, like the ways animals behave in their natural environments, or the changes in the weather. Observational techniques can also be used in psychology to understand people's behavior. For example, a scientist might watch how children in a classroom interact with each other and keep track of the number of times each child talks.