Answer: Experimenter bias.
Explanation: Experimenter bias is the condition which describes a person as a part of experiment who is influencing the outcome of the experiment so that the desired or preferred results can be obtained.Experimenter bias is also known as research biasing.
The example mentioned in the question where Brian is conducting the study with sharing his views with the participants that he expects girls should perform better than boys in the experiment is example of experimenter bias.
The actual experiment should have been conducted without any thought sharing or acknowledgement which would have produced unbiased outcomes.But according to Brain's study, the expectations are conveyed ,therefore it will influence the result of the experiment as it becomes biased.
How the present constitution can be change or amend in different ways?
The Constitution provides that an amendment may be proposed either by the Congress with a two-thirds majority vote in both the House of Representatives and the Senate or by a constitutional convention called for by two-thirds of the State legislatures.
<span>In a centrally planned economy, the government owns and operates production facilities and manages the flow of supply and demand rather than allowing interactions between businesses and consumers to determine supply and demand.
In a pure market economy the government has no role. Instead, the market makes all allocation decisions.
In a market economy, the government does not oversee the day to day micro transactions. Instead, it oversees the economy, making sure that it steps in to stabilize the market if it is going through a recession. The government is also allowed to step in and prevent trade or business with any country that it feels is a threat.
In a mixed economy, the government can create a central plan that guides the economy. The government is also allowed to own important industries, such as aerospace or banking. In some mixed economies the government handles social programs like welfare or retirement.</span>