When 3-year-old marcus first tries riding a tricycle, he pedals it slowly and awkwardly, and he has trouble steering it where he wants it to go. over time he becomes increasingly proficient, and eventually he can ride a tricycle with little conscious effort. marcus's progress illustrates the role of in development

5elections for representatives to the u.s. house of representatives are held every two years. elections take place in november, and there is usually one republican candidate and one democratic candidate on the ballot. how are candidates chosen to appear on the ballot?

Atreatment for stuttering in which the person is asked to speak in a singsong fashion, usually with the aid of a metronome is

Awaiver of the requirement for documentation of informed consent may be granted when: the investigator has no convenient place to store signed consent forms separate from the research datathe only record linking the subject and the research is the consent document and the principal risk is a breach of confidentiality.potential subjects might find some of the research questions embarrassing, personal, or intrusivethe subjects are literate in their own language; however, they do not read, write, or speak english