The major theories of color vision were first proposed _____. ...

[maychende]

The major theories of color vision were first proposed _____.
 
  A) in the 1800s, based on behavioral evidence only
  B) in the 1930s, based on some psychophysical data and lesioning studies
  C) in the 1960s after Hubel and Wiesel's pioneering research
  D) in the 1990s when advanced brain imaging studies were conducted

Question 2

Scientists sometimes conduct research that is designed to find limiting conditions of previous research or to explain conflicting findings in previous research. In general, this approach to doing research
 
  a. limits the amount of knowledge that the research can produce.
  b. will be less informative than developing ideas on the basis of the scientist's well-validated intuition.
  c. contributes to the accumulation of scientific knowledge.
  d. tends to produce difficulties for scientists who wish to replicate the study.

[Christopher]

Answer to Question 1

A

Answer to Question 2

c

[maychende]

Gracias!

[Alyson.hiatt@yahoo.com]

Excellent