An inferential test used to evaluate the differences between two means is the

"Joe the blacksmith" was an analog of

(a) Stalin (b) Bonnie (c) Clyde (d) Clinton (e) Bush

Six-month-old infants habituated to several random arrays of 8 dots continue to be bored by seeing arrays with 8 dots in a different arrangement, but show greater interest when shown an array with at least 16 dots. This suggests infants can distinguish sets of items that differ in a 1:2 ratio. This capability is called

a. a habituation system. b. a spatial navigation system. c. a numerical estimation system. d. an object tracking system.