Recording all instances of an event for a particular time period (such as how many times an older brother strikes his younger brother) without the subjects' awareness is an example of:

The answer is "naturalistic observation."

Naturalistic observation is an examination strategy ordinarily utilized by therapists and other social researchers. This procedure includes watching subjects in their regular habitat. This sort of research is frequently used in circumstances where leading lab inquire about is unreasonable, taken a toll restrictive or would unduly influence the subject's conduct.  

Naturalistic observation varies from organized perception in that it includes taking a gander at a conduct as it happens in its regular setting without any endeavors at mediation with respect to the analyst.

"harry t. moore (1905-1951) – civil rights activist, leader, and the first martyr of the civil rights movement. fannie lou hamer (1917–1977) – leader in the american civil rights movement; co-founder of the national women's political caucus and freedom democratic party. james farmer (1920–1999) – congress of racial equality."

the old way of life was represented by superstition, an angry god, and absolute submission to authority. the thinkers of the age of reason ushered in a new way of thinking. this new way championed the accomplishments of humankind. individuals did not have to accept despair. science and reason could bring happiness and progress. kings did not rule by divine right. they had an obligation to their subjects. europeans pondered the implications for nearly a century. americans put them into practice first.