The content you've requested is available without charge only to active Sigma Xi members and
If you are an active member or an individual subscriber, please log in now in order to access this article.
If you are not a member or individual subscriber, you can:
What is an emotion? More than 90 definitions have been offered over the past century, and there are almost as many theories of emotion—not to mention a complex array of overlapping words in our languages to describe them. Plutchik offers an integrative theory based on evolutionary principles. Emotions are adaptive—in fact, they have a complexity born of a long evolutionary history—and although we conceive of emotions as feeling states, Robert Plutchik says the feeling state is part of a process involving both cognition and behavior and containing several feedback loops.
Connect With Us:
An early peek at each new issue, with descriptions of feature articles, columns, and more. Every other issue contains links to everything in the latest issue's table of contents.News of book reviews published in American Scientist and around the web, as well as other noteworthy happenings in the world of science books.
To sign up for automatic emails of the American Scientist Update and Scientists' Nightstand issues, create an online profile, then sign up in the My AmSci area.
JSTOR, the online academic archive, contains complete back issues of American Scientist from 1913 (known then as the Sigma Xi Quarterly) through 2005.
The table of contents for each issue is freely available to all users; those with institutional access can read each complete issue.
View the full collection here.
Receive notification when new content is posted from the entire website, or choose from the customized feeds available.