The average ages at which voluntary skills such as grasping, crawling, and walking occur are known as ______

Techniques to aid retrieval from LTM are known as

(a) eidetics (b) algorithms (c) icons (d) mnemonics (e) feature protectors

For the birth of a first child, the first stage of labor usually lasts

a. 1 to 2 hours. c. 12 to 24 hours. b. 3 to 8 hours. d. 48 hours.