Answer to Question 1
By assigning participants to groups on the basis of the flip of a coin, numbers drawn from a hat, or a table of random numbers, the chance is increased that characteristics other than the independent variable will be equally distributed across treatment groups.
Answer to Question 2
The rate and expression of childhood symptoms and disorders often vary in relation to demographic and situational factors, such as socioeconomic status (SES) (e.g., the social, economic, and physical environment in which the child lives as reflected in measures such as family income, education, or occupation); parents' marital status; and the child's age, gender, and cultural background, to name but a few. Consequently, these variables must be assessed and controlled in most studies.
Client on IV patient-controlled analgesia (PCA).
The world has been horrified recently at a U.S. Congress so polarized and paralyzed that it cannot p
Figure 7.1 shows the rapid decline in the trust of Americans in government since the 1960s. This de
Overview of a computer-controlled high-pressure common rail V-8 diesel engine.
Recent research suggests that zinc lozenges and nasal gels may help reduce the severity
Research Methods