Types of Variables
This variable is the one that researchers manipulate to observe its effect.
What is the independent variable.
This type of research focuses on numerical data and statistical analysis to test hypotheses.
What is quantitative research.
This sampling method gives every member of the population an equal chance of being selected.
What is random sampling.
A research design where participants are randomly assigned to different groups to test an intervention.
What is a randomized controlled trial (RCT).
This variable is measured to determine the effect of the independent variable.
What is the dependent variable.
This type of research explores concepts, experiences, or phenomena through interviews and open-ended questions.
What is qualitative research.
This sampling method divides the population into subgroups and samples each subgroup.
What is stratified sampling.
This type of research design involves measuring variables without manipulating them to assess relationships.
Correlational design.
A variable that could influence the relationship between the independent and dependent variables but is not the focus of the study.
What are confounding variables.
Research that seeks to understand "how" or "why" something happens, often using smaller sample sizes and rich data.
What is qualitative research.
Participants in this sampling method are selected based on availability.
What is convenience sampling.
A research design that compares different groups at one point in time.
What is a cross-sectional study.
This type of variable consists of categories or labels without a specific order or ranking.
What is a nominal variable.
This research method involves structured data collection and is used to measure variables and their relationships.
What is quantitative research.
This sampling method is based on referrals from initial participants to recruit more subjects.
What is snowball sampling.
This design involves collecting data from the same participants at multiple time points.
What is a longitudinal study.
A variable with a meaningful order and equal intervals between values, but no true zero point.
What is an interval variable.
In this type of research, the findings are often presented in the form of themes or narratives rather than numbers.
Qualitative Research.
In a quantitative study, this is an important factor to ensure groups are treated fairly and results are reliable, especially when assigning participants to different treatments.
Random sampling.
These are three key questions you should ask when appraising a quantitative study to ensure it is of high quality.
What are: Is the study design appropriate? Was the study ethical? Are the results consistent with the tests performed.