2025教育研究法課程Chp9 Quiz

What type of study is a correlational study?

• A causal-comparative study compares preexisting groups.

• An experimental study involves manipulating variables.

• A correlational study examines the relationships among variables.

• A prediction study identifies variables that predict another variable at a later point in time.

What is the primary purpose of correlational research?

• To examine the relationship between variables.

• To predict future outcomes based on current factors.

• To compare existing groups.

• To manipulate variables.

What is a scatterplot?

• A bar graph displays the frequency of different categories of a variable.

• A line graph displays the change of a variable over time.

• A scatterplot displays the relationship between two variables.

• A histogram displays the distribution of a continuous variable.

What does positive correlation mean?

• Linear correlation refers to two variables change at a constant rate.

• Nonlinear correlation refers to two variables that do not change at a constant rate.

• Positive correlation refers to two variables that change in the same direction.

• Negative correlation refers to two variables that change inversely.

What is a prediction study?

• A relationship study examines the relationships between variables.

• A causal-comparative study compares preexisting groups.

• An experimental study manipulates variables to observe their effects.

• A prediction study uses predictor variables to forecast outcomes.

How are predictor and criterion variables related in a prediction study?

• The criterion variable is measured at an earlier point in time and used to predict the predictor variable.

• Both variables are measured simultaneously.

• Neither variable is measured; the study focuses on relationships only.

• The predictor variable is measured at an earlier point in time and used to predict the criterion variable.

What is a correlation coefficient?

• A correlation coefficient reflects how strong and in what direction two variables are related.

• A scatterplot is a graph that shows the relationship between two variables.

• A hypothesis is a statement that predicts a relationship between variable.

• A regression equation is a mathematical formula used to predict a variable's value.

How are correlation coefficients interpreted?

• +1.00 indicates a strong positive correlation, while -1.00 indicates a weak negative correlation.

• 0 indicates no correlation, regardless of variables.

• +1.00 indicates a weak positive correlation, while -1.00 indicates a strong negative correlation.

• +1.00 indicates a perfect positive correlation, while -1.00 indicates a perfect negative correlation.

What is the advantage of using multiple regression in correlational research?

• Multiple regression is used only in experimental designs.

• Multiple regression only examines relationships between two variables.

• Multiple regression does not control for extraneous variables.

• Multiple regression analyzes relationships between several variables at once.

What is an intervening variable?

• A criterion variable is the variable being predicted.

• An intervening variable mediates the relationship between two other variables.

• An extraneous variable is a variable that is not the focus of the study but could still influence results.

• A predictor variable is a variable used to predict another variable.