Dependence Techniques are types of multivariate analysis techniques that are used when one or more of the variables can be identified as dependent variables and the remaining variables can be identified as independent. Dependency is when one variable is influenced to an extent by another variable. The purpose of depth interviews is to understand the underlying motivations, beliefs, attitudes and feelings on a particular subject. Descriptive Research is a form of conclusive research that aims to describe a product or market or identify associations among variables. Desk Research is the systematic examination of all available secondary data in the context of a particular marketing research problem.
Deviation is the difference between the mean and an observed value.
Diary Panel is a type of consumer panel where participants record activities or events in a diary. Direct Observation is when behaviour or events are observed while something is happening. Direct Questioning Techniques are ways of asking people directly for information, such as personal or telephone interviews and mail surveys. Discrete Data is that from a measurement scale consisting of a number of separate values where intermediate values are not permissible, eg the number of cars per household. Disguised Observation is the observation of behaviour without participants' knowledge.