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Motivation along with other facets of human behavior are difficult to develop adequate models or theories for. Often times, these behaviors can very profoundly amongst individuals of different cultures or locales. Additionally, regarding motivation are difficult to standardize for the general person. In many cases, a person's motivation could be inherent to a number of factors that have led to their current position in life. Without being able to formulate a model that is omniscient and considers all the multitude of factors that are involved, social scientists cannot choose one theory as the correct one. In reality, the theories that are present are just the "best guesses' that have been formulated so far. Furthermore, these theories are subject to constant change and are just as dynamic as the people the hope to describe. Another major reason why it is difficult for social scientists to assign one theory as being the best one is because demographics and attitudes of the populace are constantly changing. Theories that were applicable for the hetero-normative family 50 years ago, do very little to inform of us nontraditional same sex or single parent households of today. Overall, while individuals may express their opinion regarding one theory being the best, this can often be detrimental when it comes time for analysis. Usually, it has been found that it is better to observe real situations and mold theories to them, rather than mold real human behaviors to preset theories that exist. Ultimately, it is clear that the vast number of varying theories are necessary as they are each correct in their own way, describing some individual some where very accurately, but not the sum of all individuals on the planet.
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