Exam 2: Methods in Psychology

Psychologists usually select participants for study based on:

A researcher wants to assess the effects of varying amounts of alcohol on ratings of perception of friendliness.Three groups of people are given either one,two,or three beers to drink.Three more groups of people are given either one,two,or three non-alcoholic beers to drink.Then,all participants are shown a series of pictures of people's faces and are asked to rank the perceived friendliness of each face on a scale from 1 to 10.In this experiment,the independent variable is:

The statement "Class absences are associated with lower grades" is an example of a(n):

Professor Kim creates a frequency distribution of exam scores from her class of 300 students.Possible scores on the exam ranged from zero to 100.What should be displayed on the vertical axis?

Which method does NOT use random assignment to assign participants to groups?

Anna's research yielded results that are consistent with a hypothesis derived from a behavioural theory of substance abuse.Which conclusion is CORRECT regarding the theory?

_____ use specific rules and techniques to observe and understand natural phenomena.

A p-value is a(n):

When aspects of a setting cause participants to behave the way they think an observer wants them to behave,the problem of _____ is present.

Doubting one's own conclusions is:

It is possible for a measure to be reliable but not valid.

An archaeologist discovers new evidence suggesting humans inhabited a particular area long before it was originally believed.If the archaeologist is critically thinking,she should first:

People typically search for evidence that confirms their existing beliefs.

Wally wants to see if room temperature affects happiness.He invites participants to the laboratory,where half are seated for 20 minutes in a booth held at a constant 19 degrees,and the other half are seated in an identical booth for 20 minutes at a constant 29 degrees.Wally then asks members of each group to rate their level of happiness.What is the independent variable in this experiment?

Which statement is TRUE if scores on an examination are negatively skewed?

Life expectancy,in which the majority of people live to old age but some people die young,is BEST described by a:

In an experiment,participants are placed in either an experimental group or a control group based on the flip of a coin.This method illustrates:

Informed consent:

When every member of a population has an equal chance of being included in a sample,the sample is said to be _____ the population.

Which descriptive statistic is a measure of variability?