Tommy depends on his parents to pay his college tuition and in return he helps out on weekends at the family business. The word the text uses to capture the sense of give-and-take between Tommy and his parents is:

In a correlated groups design, groups are formed with ________

A) extreme caution B) random assignment C) equal variance D) nonrandom assignment

Much research has been dedicated to improving the reliability of eyewitness testimony. One finding reveals that when constructing a lineup,

a. increasing similarity between "fillers" and a suspect leads to an increased level of erroneous identification of innocent people b. increasing similarity between "fillers" and a suspect leads to an increased level of missed identification of some guilty suspects. c. increasing the number of fillers from 5 to 7 actually decreases the rate of false positive identifications. d. decreasing the number of fillers from 6 to 3 actually increases the rate of false positive identifications.