Psychology Glossary. Correlation Coefficient. This is a measure of the direction (positive or negative) and extent (range of a correlation coefficient is from -1 to +1) of the relationship between two sets of scores. Scores with a positive correlation coefficient go up and down together (as with smoking and cancer).
Den (room) A den is a small room in a house where people can pursue activities in private. In the United States, the type of rooms described by the term den varies considerably by region. It is used to describe many different kinds of bonus rooms, including studies, family rooms, home offices, libraries, home cinemas, or even spare bedrooms. In some places, particularly in parts of the British Isles, a small den may be known as a snug.
In a fractional exponent, the numerator is the power to which the number should be taken and the denominator is the root which should be taken. For example, 125 means take 125 to the fourth power and take the cube root of the result or take the cube root of 125 and then take the result to the fourth power.. Order does not matter when evaluating exponents--it is usually easier to take the root first, and then take the power.