Bebe observes a child’s behavior after he has watched 15 minutes of violent cartoons. she codes the child’s behavior every 30 seconds according to whether he hits, kicks, pushes, or bites another child. this observational technique can best be described as observation.

systematic          

Explanation:

Systematic observation: The systematic observation is used either to disprove or support a hypothesis and is a form of calculated observation. An observation should be repeatable and bias-free to be systematic. In systematic observation, a hypothesis is being made by the researcher and then it is being tested through experimental methods.

Advantage:

1. It forms the basis of scientific inquiry.

2. Mode of getting or acquiring wisdom about the environment.

In the question above, the observational technique used by Bebe can best be described as a systematic observation.