Insecure attachment may contribute to a child's aggressive behavior

Putting "ed" at the end of the word "play" to put the action in the past tense is an example of ______

a. syntax c. top-down processing b. semantics d. bottom-up processing

An infant who learns that smiling at his or her parents brings positive attention, and therefore begins to smile more often, is demonstrating what type of learning?

a) classical conditioning b) modeling c) operant conditioning d) habituation