Lesson Quiz 2-1: Psychological Research Methods and Statistics

Psychologists use the scientific method when gathering and analyzing information in a systematic way.

• True

• False

Psychologists regularly develop theories based on case studies.

• True

• False

A cross-sectional study is a type of quantitative study.

• True

• False

One difference between an interview and a questionnaire is that the psychologist conducting an interview can clarify or rephrase a question.

• True

• False

Researchers use experiments when they have more than two variables to consider.

• True

• False

Lisa draws 10 names out of bowl containing the names of all the students at her school to determine which students she will interview for a study on the school’s computer usage. This is an example of a:

• stratified sample

• random sample

• case study

• cross-sectional study

Which of the following is most likely to have a negative correlation?

• a person’s ability as a driver and number of accidents

• the price of a television and the size of the television’s screen

• hours spent practicing the viola and chances of getting into the orchestra

• the age of a child and the child’s reading ability

A research study examined the intellectual growth of 20 premature children over a period of 18 years. This is best described as an example of:

• a longitudinal study.

• a cross-sectional study.

• a case study.

• naturalistic observation.

In a study, what is a relatively small group out of the total population called?

• case study

• variable

• control group

• sample

What do the APA’s ethical principles say about the use of deception in research?

• Deception may never be used.

• Participants must be fully informed about any deception before the research begins.

• Deception should be used only if no better alternative is available.

• As long as no participants are harmed, deception can be used whenever the researcher wishes.