Final answer:
The statistical measure indicating the extent of changes in one factor accompanied by changes in another in survey research is known as the Correlation Coefficient.
Step-by-step explanation:
A statistical measure often used in survey research that indicates the extent to which changes in one factor are accompanied by changes in another is called a Correlation Coefficient. This means that when two variables are correlated, as one variable changes, the other does as well. The correlation coefficient is a number that ranges from -1 to +1, indicating both the strength and the direction of the relationship between two variables, and is usually represented by the letter r. An example of this could be a study on how the amount of hours spent studying (independent variable) influences test scores (dependent variable). The correlation coefficient would tell us whether there's a relationship between study time and test scores, and how strong that relationship is.