Primates perceive their world through a multitude of ways. One way in which primates perceive their surroundings is via the colors that they can see (Surridge, Osorio, & Mundy, 2003). Color vision is an evolutionary trait that has provided survival benefits to primates through evolutionary time (Regan et al., 2005). However, among certain species of primates, there are drastic variations among members in terms of the colors that they can see, thus suggesting a polymorphic basis. A polymorphic basis is when a characteristic of a species varies among its members genetically (Gomes, Pessoa, Suganuma, Tomaz, & Pessoa, 2002).
New World monkeys, such as spider monkeys, are said to differ in comparison to other primates based the colors they can see due to a sex link theory (Goulart, Bonci, Galvao, Silveira, & Ventura, 2013). However, while New World monkey’s polymorphic basis for color vision is often documented in previous research, questions still arise as two why members of the human species vary among …show more content…
Carr and Durand (1985), hypothesized that children who are unable to communicate often have behavioral problems as a result of lacking functional communication and often the problem behavior functions as a form of nonverbal communication. This hypothesis led to the further theory that both problem behavior and other forms of verbal communication have the same function, thus if appropriate verbal behavior is strengthened, the problem behavior should thus be reduced. The researchers implemented the use of match-to sample paradigm training to teach the children how to functionally communicate, and then assess if there would be a resulting reduction in problem behavior in the four participants with developmental disabilities (Carr and Durand,
New World monkeys, such as spider monkeys, are said to differ in comparison to other primates based the colors they can see due to a sex link theory (Goulart, Bonci, Galvao, Silveira, & Ventura, 2013). However, while New World monkey’s polymorphic basis for color vision is often documented in previous research, questions still arise as two why members of the human species vary among …show more content…
Carr and Durand (1985), hypothesized that children who are unable to communicate often have behavioral problems as a result of lacking functional communication and often the problem behavior functions as a form of nonverbal communication. This hypothesis led to the further theory that both problem behavior and other forms of verbal communication have the same function, thus if appropriate verbal behavior is strengthened, the problem behavior should thus be reduced. The researchers implemented the use of match-to sample paradigm training to teach the children how to functionally communicate, and then assess if there would be a resulting reduction in problem behavior in the four participants with developmental disabilities (Carr and Durand,