A psychologist uses chimpanzees to test the notion that more crowded living conditions trigger aggressive behavior. Chimps are place, according to an impartial assignment rule, in cages with either one, several, or many other chimps. Subsequently, during a standard observation period, each chimp is assigned a score on the basis of its aggressive behavior toward a chimplike stuffed doll. What type of research is this

Experimental research

Explanation:

Experimental research: In psychology, the term "experimental research" is determined as a research that is focused on "scientific research design". Therefore. an experimental research consists of a specific hypothesis, independent variable, and a dependent variable. One of the significant factor is experimental research is that it can be done only in controlled environment.

In the question above, the type of research is experimental research.

answer; primary source information;

i honestly have no idea