Exam 2: Scientific Methods in Psychology

People give one answer to a survey question when they are told the survey was sponsored by the Republican Party and a different answer when they are told it was sponsored by the Democratic Party.One possible reason for the difference is

A correlation coefficient of -.7 represents a stronger relationship between variables than a correlation coefficient of +.5.

What does an Institutional Review Board do?

Researchers report that people who smile frequently are more likely than other people to have many friends.Which of the following conclusions can we draw,if any?

The mean is especially useful if the scores approximate the normal distribution.

The results of a survey are likely to be misleading if

In a double-blind study,

"Falsifiability" is considered a desirable characteristic for a scientific theory because a falsifiable theory

What can we conclude if the correlation between variable A and variable B is zero?

According to one study,the more hours students spend watching television,the lower their grades in school.This relationship is an example of

Replicable results are those that anyone can obtain,at least approximately,by following the same procedures.

Case histories are a type of naturalistic observation that focus on a single individual.

Juanita has a headache one evening so she takes the experimental drug Zenax to eliminate her headache.She goes to sleep and finds her headache gone the next day.Do these results show that Zenax was effective?

A psychologist conducts an experiment and reports that p < .05.What is the relationship between the value of p and the statistical significance of the results?

In a normal distribution,most scores cluster around the

Researchers have found that people who report having trouble sleeping are more likely than others to become depressed.Which of the following conclusions,if any,follows from these data?

It has been reported that people who trust other people are generally happier than people who do not trust others.This conclusion is probably based on the results of a

Investigators are most likely to use the case history method when they study

A correlation coefficient is a mathematical value that ranges between

If each subject in an experiment has an equal chance of being in the experimental group,then the experiment has