If the correlation between the physical weight and reading ability of children is +0.85, this would indicate that
better reading ability is associated with greater physical weight among children.
Which of the following correlation coefficients expresses the weakest degree of relationship between two variables?
To determine whether the strength of people's self-esteem is related to their income levels, researchers would most likely make use of
To represent graphically the correlation between two variables, researchers often construct a
In a test of the effects of sleep deprivation on problem-solving skills, research participants are allowed to sleep either 4 or 8 hours on each of three consecutive nights. This research is an example of
Research participants who carefully observe and report their immediate thoughts and feelings in response to different musical sounds are using the method known as
Commonly used in drug-evaluation studies, ________ ensures that research participants' belief in a drug's healing powers will not bias the results
the double-blind procedure
In a psychological experiment, the experimental factor that is manipulated by the investigator is called the ________ variable.
Dr. Frye conducts research investigations on memory, with the intent of contributing to what is known about human memory processes.
Surveys indicate that people are much less likely to support "welfare" than "aid to the needy." These somewhat paradoxical survey results best illustrate the importance of
To compare the pace of life in different countries, investigators measured the speed with which postal clerks completed a simple request. Which research method did this illustrate?
Research participants are randomly assigned to different groups in an experiment in order to
reduce the likelihood of any preexisting differences between groups of participants.
The explanatory power of a scientific theory is most closely linked to its capacity to generate testable