Dr. park identified 20 restrictive eaters (people who constantly monitor and limit their caloric intake) and 20 matched control participants. she then manipulated whether each group of participants had or had not just consumed a high calorie milkshake prior to taking part in a "taste test" of chocolate chip cookies. she found that whereas the control participants ate fewer cookies than usual after having just consumed the shake, the restrictive eaters actually ate more. dr. park’s study is:

a person-by-treatment quasi-experiment  

Explanation:

Quasi-experimental design: In a psychological experiment, the quasi-experimental design is designed to select groups on which a variable is being tested, in the absence of random selection.

Example: In a quasi-experimental design, a researcher while experimenting divides the population based on age, similar age group participants would be placed in the same group.

Person-by-treatment: The person-by-treatment design is one of the common types of quasi-experimental design. In person-by-treatment, a researcher tries to measure at least one of the independent variables, and side-by-side manipulate the other independent variable.

answer; reactive is your answer; good luck

the federal government of the united states was established by the constitution. us is a presidential republic. the president is head of state, head of government and of a two party legislative and electoral system. the supreme court balances the powers of the federal and the state government. yhe executive branch is headed by the oresident. there are two chambers of congress, the senate and the house of representatives. judicial power is exercised by the judicial branch (or judiciary), comprised of the supreme court and lower federal courts. the judiciary's function is to interpret the   constitution as well as the federal laws and regulations.