What type of design collects data on a sample of people of different ages on a single occasion?

Rajan has practiced until he is able to remember the population of every country in the world. This ability will most likely

a. greatly increase Rajan's ability to learn and remember foreign words. b. have little impact on cognitive abilities unrelated with knowledge for populations. c. disrupt his autobiographical memories. d. enhance the size of his sensory register.

Aidan reports that he is well accepted by his peers. Which of the following statements is not true?

a. Aidan is less likely to report feeling depressed. b. Aidan is less likely to be socially anxious. c. Aidan is more likely to commit truancy. d. Aidan is more likely to enjoy school.