Most motivation theorists assume that motivation is involved in the performance of all learned responses; that is, a learned behavior will not occur unless it is energized. The major question among psychologists, in general, is whether motivation is a primary or secondary influence on behavior. That is, are changes in behavior better explained by principles of environmental/ecological influences, perception, memory, cognitive development, emotion, explanatory style, or personality or are concepts unique to motivation more pertinent.
For example, we know that people respond to increasingly complex or novel events (or stimuli) in the environment up to a point and then responses decrease. This inverted-U-shaped curve of behavior is well-known and widely acknowledged (e.g., Yerkes & Dodson, 1908). However, the major issue is one of explaining this phenomenon. Is this a conditioning (is the individual behaving because of past classical or operant conditioning), a motivational process (from an internal state of arousal), or is there some better explanation?
The relationship of motivation and emotion :
Emotion (an indefinite subjective sensation experienced as a state of arousal) is different from motivation in that there is not necessarily a goal orientation affiliated with it. Emotions occur as a result of an interaction between perception of environmental stimuli, neural/hormonal responses to these perceptions (often labeled feelings), and subjective cognitive labeling of these feelings (Kleinginna and Kleinginna, 1981b). Evidence suggests there is a small core of core emotions (perhaps 6 or 8) that are uniquely associated with a specific facial expression (Izard, 1990). This implies that there are a small number of unique biological responses that are genetically hard-wired to specific facial expressions. A further implication is that the process works in reverse: if you want to change your feelings (i.e., your physiological