Sexual Dimorphism Behavior

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Observational Study on Sexual Dimorphism

The objective of this observational study was to observe and determine if sexual dimorphism existed between males and females in book carrying behavior and to compare the relative frequencies of the different carrying methods, if any existed. There are two basic types of carrying methods that can be subdivided into five different categories. In type one, books are held in a manner that partially covers the front of the body, whether using one hand or two hands. In type two, books are held at the side of the body using only one hand; therefore, leaving the front of the body uncovered. The five different categories are variations of each type. The hypothesis was that females were more likely to show type one carrying behavior whereas males were more likely to show type two carrying behavior. The purpose of this observation was to establish the validity of this hypothesis and to determine which type of carrying behavior was most typical of males and which of females.

I stationed myself at the corner of x Memorial Library at eleven in the morning on Monday, January 26, 2004. I took notice of people passing by who were carrying books without bags, briefcases, or backpacks. I recorded the subject’s sex and estimated the number of books he or she was carrying. I classified the subject’s carrying method whether type one or two and then further classified the carrying method into the different categories. I took notice of the size, number, and the weight of the books that the subject was carrying. I repeated this procedure for thirty individuals of each sex for a total of sixty observations.

My findings clearly illustrated that sexual dimorphism in carrying behavior existed between males and females. The book carrying behavior typical of males was type two. In fact, all the male subjects in my observation demonstrated type two carrying method. Contrastingly, females mostly demonstrated type one, but not all....
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