A researcher obtains chemistry achievement test scores from a group of high school students who have had laboratory experience and a group who have not. She recognizes the need to control for the variable intelligence in his study. Identify the type of control technique illustrated by the following procedures. The researcher selects a student from the lab condition who has the same IQ score as a non-lab student and continues this process to identify as many pairs as possible.
a. match
b. use analysis of covariance
c. use a homogeneous group
d. add intelligence as an additional independent variable
Ques. 2In a study of aggression, the instrument used may not really measure aggression but rather assertiveness. If so, this would most likely affect the ____validity of the study.
a. internal c. external
b. construct d. statistical conclusion validity.
Ques. 3A researcher obtains chemistry achievement test scores from a group of high school students who have had laboratory experience and a group who have not. She recognizes the need to control for the variable intelligence in his study. Identify the type of control technique illustrated by the following procedures. The researcher uses only those students with IQs of 100-105.
a. match
b. use analysis of covariance
c. use a homogeneous group
d. add intelligence as an additional independent variable
Ques. 4An experiment conducted in a highly controlled lab setting is more likely to have problems with ____ than is an experiment conducted in a classroom setting.
a. external validity c. statistical conclusion validity
b. internal validity d. internal consistency
Ques. 5Regression toward the mean will probably occur in a matched sample when
a. the groups are from different populations.
b. the groups are randomly assigned from the same population.
c. the sample is heterogeneous on the dependent variable.
d. the sample is homogeneous on the dependent variable.
e. the sample is heterogeneous on the independent variable.
Ques. 6Identify the threats to internal validity illustrated in the example below. The students who scored extremely high on a test would score lower if given the test again.
a. Instrumentation
b. Experimental mortality
c. Selection-maturation interaction
d. Statistical regression
e. Diffusion
Ques. 7To achieve partial control in ex post facto research, the researcher can
a. conduct a pilot study to determine a common cause.
b. match subjects on as many extraneous variables as possible.
c. randomly assign subjects to experimental and control groups.
d. b and c
Ques. 8Identify the threats to internal validity illustrated in the example below. Some students left the experimental program because of a conflict with sports.
a. Instrumentation
b. Experimental mortality
c. Selection-maturation interaction
d. Statistical regression
e. Diffusion
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