Exam 2: Research Methods in Psychology

Why is it essential that the experimental and control groups be treated identically in every respect but one?

In an experiment,a researcher manipulates one variable to see how it affects a second variable.The second variable,which is observed for any possible effects,is called the __________.

A sample that does not truly represent the population in question is known as a _____________ sample.

In an experiment to test the effects of anxiety on performance,the dependent variable is the __________.

In a controlled experiment,the group subjected to a change in the independent variable is called the __________ group.

Experimenter bias can best be controlled using ________.

Observing behaviour as it happens in real-life natural settings without imposing laboratory controls is known as the __________.

A researcher tests the hypothesis that students who study in the room where they take their tests will perform better on the tests than students who study in other rooms.She requires one group to study in the classroom where the exam is given and another group to study in the library.All students take the test in the classroom,and their test performance is compared.In this example,test performance is:

In an experiment,the group of subjects to which the experimental group is compared is called the:

A correlation tells us:

Positive correlation shows:

In an experiment,a researcher manipulates one variable to see how it affects a second variable.The manipulated variable is called the __________.

A psychologist,studying pilot trainees,picks a select group of trainees who are hopefully representative of all other trainees.The group of trainees being studied by this psychologist is collectively known to researchers as a __________.

In psychological studies,randomization is used to ensure that:

Mr.Marshall hired June to collect data from a group of subjects.Neither June nor the subjects were aware of the independent variable that Mr.Marshall had manipulated.This is an example of _______.

A subset of cases selected from a larger population is a __________.

A researcher,based on her review of relevant scientific studies,believes that there is a relationship between the frequency of a baby's crying and whether it was nursed at set intervals or on a demand schedule.If this belief were tested by experimentally manipulating feeding schedules,the feeding schedule would be called the:

A researcher tests the hypothesis that students who study in the room where they take their tests will perform better on the tests than students who study in other rooms.She requires one group to study in the classroom where the exam is given and another group to study in the library.All students take the test in the classroom,and their test performance is compared.In this example,where students study is the:

To determine if sugar-rich diets affect hyperactivity in kids,a researcher prepared two daily menus that children would receive for a 30-day period.A high-sugar diet was given to the boys,while the girls had a menu that seemed identical but was not a high-sugar diet.At the end of 30 days,the boys and girls were evaluated to determine their levels of hyperactivity.In the study,the high-sugar diet is the _______.

Which of the following is a strength of experiments?