Point Biserial Correlation is a statistical method used to measure the strength and direction of the relationship between one continuous variable and one binary variable. The binary variable typically has two categories, such as "yes/no" or "male/female," while the continuous variable can take on a range of values, like test scores or height. This correlation coefficient ranges from -1 to 1, where values close to 1 indicate a strong positive relationship, values close to -1 indicate a strong negative relationship, and values around 0 suggest no relationship. It is particularly useful in fields like psychology and social sciences for analyzing survey data.