Glossary D
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.
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).