Maura lives in an institution for retarded citizens. She has been ...

[michelleunicorn]

Maura lives in an institution for retarded citizens. She has been taught how to brush her teeth after a meal, but does so at a very low frequency. A researcher wants to discover how to increase the frequency of Maura's tooth brushing. She gives Maura a star on a chart that is prominently displayed in the bathroom every time she brushes her teeth after a meal. Maura's frequency of tooth brushing increases under these conditions. Then the experimenter stops giving Maura a star for brushing her teeth and records a drop in the frequency of tooth brushing. Finally, the researcher reinstates the star reward condition and records a rise in the frequency of tooth brushing. This study uses the _____ design.
 
  a. case study c. survey
  b. experimental d. ABAB

Question 2

In order to estimate the average (mean) weight of all professional football players, an investigator determines the weight of the Dallas Cowboy players. All professional football players constitute a _________.
 
  a. population c. sample
  b. parameter d. statistic

[akemokai]

Answer to Question 1

D
A is the baseline or no-star condition; B is the condition in which tooth brushing is rewarded with a star on the chart.

Answer to Question 2

A

[michelleunicorn]

Excellent

[rachel]

Gracias!