Research Methods and Correlation Concepts

An inactive substance or condition that is given to the control group in place of the treatment, used to control for the effects of mere participation in an experiment.

• Placebo

• Antidote

• Vaccine

• Therapeutic agent

This is a double-blind procedure.

• Double-Blind Procedure in Anxiety Medication Study

• Single-Blind Procedure in Pain Management Study

• Open-Label Procedure in Depression Treatment

• Randomized Control Trial in Sleep Disorder Research

A relationship between two variables in which they move in opposite directions (as one increases, the other decreases).

• Positive Correlation

• Negative Correlation

• No Correlation

• Direct Correlation

In an experiment, the outcome that is measured.

• Independent Variable (IV)

• Control Variable (CV)

• Dependent Variable (DV)

• Extraneous Variable (EV)

A method of selecting a sample from a population in which every member has an equal chance of being chosen, ensuring the sample represents the population.

• Random Sampling

• Systematic Sampling

• Convenience Sampling

• Stratified Sampling

The extent to which a test or experiment measures or predicts what it is supposed to measure or predict.

• Reliability

• Validity

• Reproducibility

• Accuracy

-0.78 is the strongest correlation coefficient.

• Strongest Correlation Coefficient

• Weakest Correlation Coefficient

• No Correlation Coefficient

• Moderate Correlation Coefficient

A research method in which an investigator manipulates one or more factors to observe the effect on a behavior or mental process.

• Experimental Research

• Descriptive Research

• Correlational Research

• Qualitative Research

The dependent variable is the height of the roses at the end of the month.

• Dependent Variable in Fertilizer Study

• Independent Variable in Fertilizer Study

• Control Variable in Fertilizer Study

• Constant Variable in Fertilizer Study

The quality of a hypothesis that makes it possible to design a study that could prove it wrong.

• Falsifiable

• Verifiable

• Ambiguous

• Indeterminate