A researcher was interested in finding out whether children's ...

[biggirl4568]

A researcher was interested in finding out whether children's ability to exhibit self-control when offered unhealthy food changed with age. He asked parents of three-year-old, six-year-old,
 
  and nine-year-old children to bring their children into the laboratory, where
  they were allowed to eat as much candy, cookies, and cake as they wanted. The
  researcher then compared the amount of food eaten by children of the three different ages.
  This is an example of:

Question 2

To study change over time, researchers use which three basic research designs?
 
  observation, experiments, survey
  cross-sectional, longitudinal, cross-sequential
  biological, social, cognitive
  significance, odds ratio, factor analysis

[karmakat49]

Answer to Question 1

a naturalistic observation.
cross-sectional research.
longitudinal research.
cross-sequential research.

Answer to Question 2

cross-sectional, longitudinal, cross-sequential

[biggirl4568]

Excellent

[FergA]

Thanks for the timely response, appreciate it