Glossary D

Dual-earner households is defined as households in which both partners are employed.

Dual-stream model of speech perception refers to a model that proposes a ventral stream starting in the temporal lobe that is responsible for recognizing speech, and a dorsal stream starting in the parietal lobe that is responsible for linking the acoustic signal to the movements used to produce speech.

Dual-system hypothesis refers to a hypothesis that suggests that two (2) languages are represented somehow in separate systems of the mind

Dual-task performance refers to an experimental paradigm involving presentation of two (2) tasks for a person to work on simultaneously.
Dualism is the belief that mind and body are different kinds of substance , existing independently. Moreover, Dualism is the view of behavior according to which actions can be separated into two (2) categories : voluntary behavior controlled by the mind, and involuntary behavior controlled by reflex mechanisms .

Dualist refers to anyone who believes that there are two (2) aspects to humans (1) the physical and (2) mental. Likewise, Dualist is described as one who believes that a person consists of two (2) separate entities: (1) a mind, which accounts for one's mental experiences and rationality, and (2) a body, which functions according to the same biological and mechanical principles as do the bodies of nonhuman animals.

Duality refers to the fact that language is represented at two (2) levels: phonology, the actual sound that a speaker produces, and the underlying abstract, meaning of language, reflected by the syntax (rules of putting words together) as well as semantics (meaning of those words and concepts).

Duality of patterning refers to a feature of a communication system in which a small number of meaningless units can be combined into a large number of meaningful units.