Question

Manipulation of one or more variables, random assignment to either a control group or treatment group, and observation of the outcome is:

a) Experimental research
b) Cross-sectional studies
c) Longitudinal studies
d) Exploratory research

Answer 1

Experimental research involves manipulating variables, randomly assigning participants to control or treatment groups, and observing the outcome to test causal relationships between variables.

Step-by-step explanation:

In experimental research, one or more variables are manipulated, participants are randomly assigned to either a control group or a treatment group, and the outcome is observed. This type of research design allows researchers to test causal relationships between variables.

For example, a study investigating whether taking aspirin reduces the risk of a heart attack may randomly assign participants to either a group that takes aspirin or a group that takes a placebo. The researchers would then observe and compare the number of heart attacks in each group.

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