Psych Chapter 2

In a ____ sample, subgroups in the population are represented proportionately in the sample.

• random

• stratified

• representative

• nonrepresentative

A psychologist studies the same group of people at regular intervals over a period of years in a

• survey

• cross-sectional study

• case study

• longitudinal study

Using a _____, a psychologist obtains information by asking many individuals a fixed set of questions.

• survey

• cross-sectional study

• case study

• longitudinal study

Participants in an experiment who are not exposed to the independent variable are part of the

• sample

• population

• experimental group

• control group

In an experiment, a hypothesis is an educated guess about the relationship between two

• variables

• samples

• populations

• control groups

In an experiment, a researcher's _____ may produce nonrepresentative results.

• expectations

• behavioral cues

• techniques

• all of the above

The best way for an experimenter to eliminate any possibilities that she might unconsciously find what she expects to find is by using

• a single-blind experiment

• a double-blind experiment

• a placebo experiment

• a self-fulfilling prophecy

Before conducting an experiment on people, psychologists today are required to submit their plan

• to a psychology journal

• to a federal judge

• to a Human Subjects Committee

• to the participants

The results of the Milgram experiment implied that individuals could easily inflict pain on others if such orders were issued by a

• trusted friend

• volunteer researcher

• respected authority

• none of the above

A ______ is some form of treatment that resembles medical therapy but has no medical effects.

• placebo

• tranquilizer

• dependent variable

• control