Which of the following is not a descriptive statistic?

The difference between a reinforcer and a punisher is that ________

a. reinforcers are primary and punishers are secondary. b. punishers are primary and reinforcers are secondary. c. reinforcers strengthen behavior and punishers weaken behavior. d. reinforcers are positive and punishers are negative.

Suppose Tamika looks up a number in the telephone book. After getting a busy signal, a minute or so later she tries to call again but has already forgotten the number! This example illustrates the limited duration of ________ memory

a) sensory b) short-term c) echoic d) implicit