A true experiment involves the identification and control of variables. What is an example of a scientific investigation that might not involve a true experiment

Explanation:

Since the definition of true experiment has been provided in the question, let's proceed to define some other parameters.

Scientific investigation that might not involve a true experiment is called non-experimental research while the one that involves a true experiment is called experimental research.

Non-experimental researches are usually descriptive in nature. An example of a non-experimental research is the observation and recording of the number and the beak type of birds that visits a park. As seen, this experiment does not have it's variables set out for identification or even control.