RM Exam 2 questions with verified
answers
Chapter 6: Research Strategies and Validity - correct answer ✔✔Things to consider when you are
deciding on the
research design to employ:
Research questions or goals
Group versus individual
Same individuals (within) versus different individuals
(between)
The number of variables to be included
What would you like to be able to say at the end of the
research project?
A between-subjects design has a separate group for each treatment condition. The between-subjects
design is also called the independent measures design.
A within-subjects design compares two or more sets of scores from the same individuals. a;also called
repeated measures.
Descriptive research strategy - correct answer ✔✔examine and describe a variable within a
specific group.
Correlational research strategy - correct answer ✔✔examine and describe relationship
between two variables within a specific group; no causal
inferences.
Non-Experimental research strategy - correct answer ✔✔examine and describe relationship
, between two variables between two groups or for one
group at two different time periods; no causal
inferences.
Quasi-experimental research strategy - correct answer ✔✔Attempt to examine and describe the cause-
and-effect
relationship between or among variables
Manipulation of an independent variable (treatment)
No random assignment
Two nonequivalent-group designs
Internal validity - correct answer ✔✔Internal Validity: the extent to which extraneous variables
have been controlled by the researcher, so that any observed
effect (in dependent or outcome variable) can be attributed
solely to the treatment variable.
Raise doubts or questions about the interpretation of the
results.
A research study with strong internal validity produces a
single, unambiguous explanation for the relationship between
two variables.
Threat to internal validity is any factor that allows or offers
an alternative explanation for the results.
Threats to internal validity - correct answer ✔✔History: experimental treatments extend over time,
providing for other events to occur besides the
experimental treatment.
Maturation: physical or psychological changes in the
research participants are likely to occur.
Threats to Internal Validity
answers
Chapter 6: Research Strategies and Validity - correct answer ✔✔Things to consider when you are
deciding on the
research design to employ:
Research questions or goals
Group versus individual
Same individuals (within) versus different individuals
(between)
The number of variables to be included
What would you like to be able to say at the end of the
research project?
A between-subjects design has a separate group for each treatment condition. The between-subjects
design is also called the independent measures design.
A within-subjects design compares two or more sets of scores from the same individuals. a;also called
repeated measures.
Descriptive research strategy - correct answer ✔✔examine and describe a variable within a
specific group.
Correlational research strategy - correct answer ✔✔examine and describe relationship
between two variables within a specific group; no causal
inferences.
Non-Experimental research strategy - correct answer ✔✔examine and describe relationship
, between two variables between two groups or for one
group at two different time periods; no causal
inferences.
Quasi-experimental research strategy - correct answer ✔✔Attempt to examine and describe the cause-
and-effect
relationship between or among variables
Manipulation of an independent variable (treatment)
No random assignment
Two nonequivalent-group designs
Internal validity - correct answer ✔✔Internal Validity: the extent to which extraneous variables
have been controlled by the researcher, so that any observed
effect (in dependent or outcome variable) can be attributed
solely to the treatment variable.
Raise doubts or questions about the interpretation of the
results.
A research study with strong internal validity produces a
single, unambiguous explanation for the relationship between
two variables.
Threat to internal validity is any factor that allows or offers
an alternative explanation for the results.
Threats to internal validity - correct answer ✔✔History: experimental treatments extend over time,
providing for other events to occur besides the
experimental treatment.
Maturation: physical or psychological changes in the
research participants are likely to occur.
Threats to Internal Validity
