Your psychology professor asks you to help him with his study of aggressive children. Your job is to go to a playground and record the frequency of aggressive acts among a sample of first graders. Your measurement technique is called:.

Naturalistic observation

Explanation:

Naturalistic observation -

It is the method of observation in the research field , where the method used is observing the object of study in their particular natural environment , is referred to as naturalistic observation.  

This helps to get a pure and proper source of knowledge for the research work , and helps to understand the subject is the best possible way.  

Hence , from the given scenario of the question ,

The correct term is Naturalistic observation .

acts of terrorism occur globally. the united nations global counter-terrorism strategy was created in order to build adequate systems of support and solidarity with victims of terrorism. here´s a summary of the proposed key themes: the importance of giving victims a face and a voice; protecting their dignity; giving victims legal status and defending their legal rights; providing victims with medical, psycho-social and financial support; building solidarity with victims; improving media coverage of victims; and focusing on the link between victims and counter-terrorism efforts more generally.

the answer to your question is,

old stone age.

-mabel < 3