Logan understands the concepts in his statistics class. However, during tests, he spends the entire time on the most difficult problems and never gets to the problems that he can solve easily. Logan's inability to adapt his strategy to the testing situati

Three-week-old Alex will suck on anything that touches his lips whether it was his hand, his father's back, a cloth diaper, or a toy. This indiscriminate sucking is an example of a

a. simple reflex. c. primary circular reaction. b. circular reaction. d. secondary circular reaction.

Which of the following motor skills is believed to play the greatest role in infant cognitive development?

A) crawling B) reaching C) rolling from back to side D) walking