But a large amount of crystals or definite types of crystals can indicate kidney stones are at hand or that there is a dilemma with how the body is metabolizing food. Symptoms of Crystals in Urine When crystals are found in the urine it is an indication or a symptom that something is wrong in the urinary system.
Shelton (1999) further clarifies human subjects research: âA key aspect of research is that there be a systematic design in advance, generally utilizing a scientific approach or protocol, for the definite purpose of contributing to generalizable knowledge.
Although most psychological research involves human subjects, some psychologists study animal subjects instead of or in addition to humans. 1  Research with animal subjects has helped psychologists do the following: 2  Learn facts about animal species. 3  Find ways to solve human problems.