Research Methods I
What are measures of central tendency?
Mean, median, and mode
The two variables that go into formulating your research question
dependent and independent variables
A formal statement about the predicted outcome of a study
Is a hypothesis
The reduction or elimination of the effects of extraneous variables is done by using what?
Randomization and Control groups
Type of research design that involves manipulation or control of one or more factors
Experimental research
Comparing critical values of a sample to a population, defining target population by specifying criteria, and determining sample size are all?
The three steps included in sampling
What is a convergent mixed methods design (sometimes referred to as a concurrent design)
The qualitative and quantitative data are collected and analyzed during a similar timeframe.
Something that assumes that there will be NO SIGNIFICANT differences between groups or relationships among variables
Is a null hypothesis (H0)
In observational studies it is important to ensure the observations are made in the same manner. This is:
Inter-rater reliability
The non-experimental research design that involves surveys, polls, case studies, etc.
Descriptive studies
What is it when items are listed in order on a survey instrument?
An ordinal level of measurement
Using previously conducted and published research to answer a clinical question (is part of)
evidence based practice
When using physiologic measures what needs to be appraised?
Accuracy, Precision, Sensitivity, Sources of Error
What is the use of existing data collected or created for some other purpose called?
Secondary data sources
Research that involves measuring several variables and assessing the relationships among them.
Correlational research design
What type of research method uses statistics to analyze the data?
Quantitative research
What type of research question might be used in correlational research?
What is the relationship between________________?
What is an exploratory sequential mixed methods design?
Exploratory sequential mixed methods design occurs when the qualitative data collection and analysis builds or develops a quantitative instrument or quantitative intervention
What is the type of sampling where the population is first divided into different subgroups or strata and a separate random sample is selected from each stratum.
Stratified Random Sampling
What statistical test is used to determine the strength of the relationship among multiple variables and which variables have the strongest predictive power
Regression
What is the assignment of participants to different conditions according to a random procedure, such as flipping a coin, rolling a die or using a random number generator?
Random sampling or random assignment
PICOT stands for
Population, intervention, comparison, outcome and time
Something that explains the intent of the study through the use of descriptive, differences, and relational terms or questions
A statement of the purpose of the research study
Researchers must control these to ensure internal validity: they can contaminate the study findings
Confounding variables.
What type of research collects data from a representative sample at only one point in time?
Cross-sectional research design