Glossary D

Double-blind research design refers to an experimental design in which the subjects and the principal investigator are not aware of the experimental treatment order.

Double-blind study is defined as a study in which neither the participant nor the experimenter knows which condition the participant is in.

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Double-blind technique refers to an experimental procedure in which neither the person giving the treatment nor the person receiving the treatment knows whether the participant is in the experimental or control group.

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Double-blind testing is a term used in Forensic psychology that refers to a lineup administration in which neither the police officer nor the witness knows which lineup member is the suspect.

Double-deficit hypothesis poses that reading disorders can be traced to deficits in phonological processing and/or naming speed. The presence of both a deficit in phonological processing and slow naming speed is predictive of the most severe reading problem. Double-deficit hypothesis likewise refers to the theory of Dyslexia which suggests that dyslexic children have biological deficits in two (2) areas: phonological processing (interpreting sounds) and in naming speed (for example, identifying letters such as b versus d, or w versus m).

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Double-standard thinking refers to the tendency to consider the actions and attributes of one’s own group as positive, fair, and appropriate, but to consider these very same behaviors or displays to be negative, unfair, and inappropriate when the outgroup performs them.

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Doubt is defined as a sense of uncertainty about one's abilities and one's worth.

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Doula refers to person familiar with childbirth who provides emotional and physical support throughout labor and delivery