AP PSYCHOLOGY

Detailed explanation-1: -Experimental research, often called true experimentation, uses the scientific method to establish the cause-effect relationship among a group of variables that make up a study.

Detailed explanation-2: -Four major design types with relevance to user research are experimental, quasi-experimental, correlational and single subject. These research designs proceed from a level of high validity and generalizability to ones with lower validity and generalizability.

Detailed explanation-3: -In the experimental method of research, the independent variable is manipulated to observe and measure its effect on the dependent variable. Experimental Method: Experimental research is research conducted with a scientific approach using two sets of variables.

Detailed explanation-4: -A moderator variable changes how much the independent variable influences on the dependent variable, moderating the strength of the relationship between the two variables.