____ evaluate treatment outcomes for children who are unsystematically assigned to treatment and control conditions

According to the research on sentence generation during writing,

a. the linearization problem is seldom an issue for written language. b. hesitant phases tend to alternate with fluent phases. c. sentence generation is typically an orderly, systematic process. d. sentence generation during writing has almost nothing in common with sentence generation during speaking.

The idea that the eye contains separate receptors for red, green, and blue is known as the ______ theory

a) opponent-process b) additive color mixing c) trichromatic d) reductive color mixing