Chapter 2 Quiz

Which type of sample includes all the different types of people that are members of a group?

• Stratified sample
• Representative sample
• Random sample
• Convenience sample

What type of sample consists of a large number of people that is not typical of the members of a group?

• Stratified sample
• Representative sample
• Random sample
• Convenience sample

What type of sample consists of deliberately selected members of various types of subgroups?

• Stratified sample
• Representative sample
• Random sample
• Convenience sample

Which type of study focuses in depth on a small number of subjects?

• Case study
• Correlational study
• Survey
• Experimental study

Which type of study looks at the same group of people over a period of time?

• Cross-sectional study
• Correlational study
• Longitudinal study
• Experimental study

What is an independent variable in a psychological study?

• The variable that is observed
• The variable that is controlled
• The variable that is manipulated
• The variable that is measured

How do people unconsciously make their expectations known to others through their behavior?

• Through written messages
• Through body language and nonverbal cues
• Through verbal communication
• Through direct confrontation

What is the difference between a single-blind experiment and a double-blind experiment?

• In a single-blind experiment, both the participants and the researchers are unaware of the treatment, while in a double-blind experiment, only the participants are unaware
• In a single-blind experiment, only the participants are unaware of the treatment, while in a double-blind experiment, both the participants and the researchers are unaware
• In a single-blind experiment, the participants are aware of the treatment, while in a double-blind experiment, they are unaware
• There is no difference between a single-blind and a double-blind experiment

What is a placebo?

• A treatment that is intentionally given to a participant to produce a specific effect
• A control group in an experiment
• A psychological technique used to manipulate participants' behavior
• A substance that has no therapeutic effect, given to a participant in a clinical trial

Why does a placebo affect a participant's behavior?

• Because participants believe they are receiving a beneficial treatment and their expectations influence their behavior
• Because placebos are designed to alter participants' brain chemistry
• Because participants are aware that they are receiving a placebo and act accordingly
• Because placebos contain active ingredients that produce a physiological response