Research Methods Midterm
Terms in this set (48)
the intervention in a study (independent variable)
Alternate forms reliability
Administer one version of the test followed by the second version and assess the consistency between the 2 forms.
Group membership, describe the attributes of the participants (pws and those who don't stutter).
an independent variable, can only be categorized or named (learning disabled). There is no ranking. These are shown using bar graphs.
cause and effect relationship
The degree to which a relationship exists between test scores and some criterion measure administered at the same time. Established test and a new test.
The degree to which the tool yields data that are consistent with what we know about the theoretical construct being measured. (if the scores are consistent with what you expect)
subjective, degree to which the tool assesses the content domain.
can be measured along some continuum that reflects a rank order of the values. These are numeric (5mg). These are shown as data points.
The group that does not receive treatment and is then used as a benchmark to measure how the other tested subjects do.
Attempts to determine if a relationship exists between 2 variables of interest. Positive means both go in the same direction, negative means they go in opposite direction. Want the r value to be close to 1
concurrent and predictive
the effect, the consequence. The skill or behavior you are measuring.
implies non-experimental. not cause-effect.
differential selection of subjects
Differences that exit between groups prior to the study.
direction of relationship
positive or negative correlation.
the only type of research that can establish cause and effect. They need to be randomized and have an active independent variable.
the degree to which the results of the study will generalize to other populations and settings.
the degree to which the items appear to measure what the test is intended to measure.
the extent to which the results represent the population and can be applied outside of intervention to persons of that population.
Events occurring between pre and post measures that are not part of the experimental treatment (ex. evacuation, disaster, happens in one group and not the other)
the tentative prediction of the research findings, an educated guess.
Directional - A will be better than B
Non-directional - A will not be the same as B
Null - they are equal
the cause, the antecedent, the change agent
Changes in the calibration of a measuring instrument or changes in the observers or scorers used. Also, if you use a test/tool that is not reliable (stable: get the same score). Between pre- and post- test.
the degree to which the design ensures that the treatment was responsible for the change in the DV
Institutional Review Board, review research in advance to ensure ethical considerations are met
Controls for known sources. Matching is more common for our field. make sure that each group has participants that are relatively the same
Changes within participants not controlled by the researcher. Can be recovering from something (stroke) not just age.
the group of individuals that the study is targeting
the degree to which scores generated from the tool can be used to predict some future behavior.
survey, a tool used to collect data in descriptive-survey research.
controls for known and unknown sources of variation. When all participates are randomly assigned to groups. It prevents population bias.
Movement of post-test scores toward the mean by participants whose original scores were atypically high or low.
do the participants represent the population
the group of participants within the study
single subject design
one or a small number of participants. the participant is both the treatment and control group. they get baseline, treatment and then see if baseline returns back to normal or not.
strength of relationship
how closely the data points converge around the diagonal line
A questionnaire or interview designed to investigate the opinions, behaviors, or characteristics of a particular group.
administer the test and wait for a period of between 1 week and 1 month. See if the performance is the same.
waiting list control group
The control group doesn't get the treatment immediately, they recieve the intervention after the study is complete. More ethical then not recieving therapy.
When participants are not randomly assigned to groups but the treatments are randomly assigned.
2 independent variables
More than 2 independent variables
a study in which there are two or more independent variables, or factors. Determines if there is an interaction
Direct observation of how participants develop over time.
Rather than directly observing all participants of interest over time, observe different participant age groups and generalize about the changes that would occur with the participants. Much quicker but less powerful.
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