Professor adams is interested in comparing the attitude today’s 70-year-old adults have toward using computers with the attitude that 70-year-old adults had 10 years ago. assuming that she has computer attitude measures from a group of 70-year-old adults taken this year and computer attitude measures from a group of 70-year-old adults made 10 years ago, which type of research design does professor adams have?

time-lag

Explanation:

In time-lag research design, the researcher collect several information from subjects with similar attributes , but within different period of time.  We can say that professor Adams did this from this part of the excerpt  :

. . .group of 70-year-old adults taken this year and computer attitude measures from a group of 70-year-old adults made 10 years ago, . . .

In most cases, time-lag research design is conducted in order to study the development of people with a certain characteristics, or to find out the behavioral change within people form different generations.

answer; procedural justice;