Structuralism brought forth the focusing on mental attributes and linking them through the process of association. Titchener believed that psychology's goal was to "discover the nature of the elementary conscious experiences--to analyze consciousness into its component parts and thus determine its structure." (Schultz, 2004, p117). Much of this was done thought introspection.
Functionalism, on the other hand, began as a result of Titchener's Structural theory and greatly influenced American education. It incorporated basic ideology from William James and Charles Darwin. It's an eclectic viewpoint that focuses on function rather than the structure of the mental process. Harvey A. Car defined psychology as having two major components. He defined "the subject matter of psychology as mental activity--those processes such as memory, perception, feeling, imagination, judgment, and will." (Schultz, 2004, p199) He also stated that the "function of mental activity is to acquire, fixate, retain, organize, and evaluate experiences and to use these experiences to determine one's actions." (Schultz, 2004, p199) He labeled these as adaptive or adjustive behaviors.
Though the two theories are on different ends of the spectrum, they both incorporate introspection, a form of self-evaluation. Titcheners form of introspection relied on observers who were trained to describe elements of their consciousness state. This was scrutinized by the psychological community. It was seen that when one introduces an observing variable, the conscious