334 Chapter
10
Motivation and Emotion
been attacked by a vicious pit bull, the amygdala processes that information and
leads us to react with fear when we see a pit bull later—an example of a classically
conditioned fear response (Miller et al., 2005; Berntson et al., 2007; Kensinger, 2007;
LaBar, 2007).
Because neural pathways connect the amygdala, the visual cortex, and the
hippocampus (which plays an important role in the consolidation of memories),
some scientists speculate that emotion-related stimuli can be processed and
responded to almost instantaneously (see Figure 3). This immediate response
occurs so rapidly that higher-order, more rational thinking, which takes more time,
seems not to be involved initially. In a slower but more thoughtful response to
emotion-evoking stimuli, emotion-related sensory information is fi rst evaluated
and then sent on to the amygdala. It appears that the quicker system offers an
immediate response to emotion-evoking stimuli, whereas the slower system helps
confi rm a threat and prepare a more thoughtful response (Dolan, 2002).
MAKING SENSE OF THE MULTIPLE
PERSPECTIVES ON EMOTION
As new approaches to emotion continue to develop, it is reasonable to ask why
so many theories of emotion exist and, perhaps more important, which one pro-
vides the most complete explanation. Actually, we have only scratched the surface.
There are almost as many explanatory theories of emotion as there are individual
emotions (e.g., Manstead, Frijda, & Fischer, 2003; Frijda, 2005; Prinz, 2007; Herz-
berg, 2009).
Why are theories of emotion so plentiful? For one thing, emotions are not a
simple phenomenon but are intertwined closely with motivation, cognition, neuro-
science, and a host of related branches of psychology. For example, evidence from
brain imaging studies shows that even when people come to supposedly rational,
nonemotional decisions—such as making moral, philosophical judgments—emotions
come into play (Greene et al., 2001).
In short, emotions are such complex phenomena, encompassing both biological
and cognitive aspects, that no single theory has been able to explain fully all the
facets of emotional experience. Furthermore, contradictory evidence of one sort or
another challenges each approach, and therefore no theory has proved invariably
accurate in its predictions.
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