The Texas legislature is responsible for its own redistricting as well as for that of the Texas congressional delegation

Which of the following best describes the nature of the second transformation of terrorist groups within the past two decades?

a. from groups operating under government control to radical groups operating independently of government control b. from groups trained primarily in the Middle East to groups trained primarily in Europe and America c. from highly centralized groups under the direction of a single leader to independent agents linked by the Internet d. from groups operating under government control to independent agents linked by the Internet

Age could affect reaction time, as well as nicotine. How could the researcher have controlled for this potential extraneous variable?

a) by randomly selecting participants from the population b) by counterbalancing the order of stimulus presentation across participants c) by matching each participant in the experimental group with a participant of the same age in the control group d) by using a different dependent variable