mixedmedia

I just read about this a few weeks ago in my psychology class!

The three temperaments are 'easy,' 'difficult,' & 'slow to warm up.' And they came from a classic study called the 'New York Longitudinal Study" (NYLS).

I don't really see much information on the web regarding this study, except for some books.

Our textbook also mentions another set of classifications called 'The Big Five' or OCEAN for:

Openness
Conscientiousness
Extroversion
Agreeableness
Neuroticism

Here's the wiki page on them:
Big Five personality traits - Wikipedia, the free encyclopedia

and there is a test here:
The Personality Project

and here is another one (300 questions - big):
IPIP NEO-PI, Introductory Information

I'm glad you got some answers you can work with.

__________________
Most people go through life dreading they'll have a traumatic experience. Freaks were born with their trauma. They've already passed their test in life. They're aristocrats. - Diane Arbus
PESSIMISM, n. A philosophy forced upon the convictions of the observer by the disheartening prevalence of the optimist with his scarecrow hope and his unsightly smile. - Ambrose Bierce