Validity vs. Reliability
the extent to which an experiment, test, or measure produces the same results on repeated trials.
What is Reliability
Research design in which the relationship among two or more variables is examined, but causality cannot be determined.
What is correlational research?
Sampling technique that gathers samples, and allows everyone within the population an equal chance of being selected.
What is Probability Sampling
Overall strategy underlying the study, created only after a research question has been developed; serves as a visual model, as to how the question will be answered.
What is a research design?
refers to the degree to which a study accurately reflects the content that the researcher is attempting to measure.
What is Validity
Study participants are randomly assigned to a particular treatment and other study participants receive usual care (or a sham procedure)
randomized control trial
Type of research that is less structured, involves interviews, group discussions. Does not focus on statistical methods.
What is qualitative research?
when a measure or test is repeated on the same subject at a future date.
What is test-restest reliability?
Research design that manipulates a variable, but does not involve manipulation.
What is quasi-experimental research?
Subjects are selected because they are easily accessible. Easiest, cheapest, and less time consuming. (ex. classmates, family members, friends, etc.)
What is a convenience sample?
Type of research that uses statistical methods to analyze numerical data.
What is quantitative research?
Positive relationship between scale scroes and a future behavior that is related to the construct assessed by the scale.
What is predictive validity?
Research design in which the primary goal is to describe the variables, not examine relationships.
What is descriptive research?
When the researcher divides the entire population into different subgroups and randomly select the participants from the subgroup. (ex. Researcher chooses to study college students, he/she then divides the pop into 3 groups: athletes, non-traditional, and traditional. The researcher randomly selects the same amount from each group).
What is stratified sampling?
Variable that the researcher manipulates or wants to test.
What is an independent variable?
extent to which 2 or more individuals agree; address the consistency of the implementation of a rating system.
What is interrater reliability?
Detailed investigation of single individual, group or organization.
What is a case study?
A proposed explanation on the relationship of two or more variable, based on limited evidence.
What is an hypothesis?