title: A paradoxical dissociation in the effects of midazolam on recollection and automatic processes in the process dissociation procedure.
abstract: This study used midazolam-induced amnesia to explore the plausibility of the estimates provided by the process dissociation procedure (PDP), which is designed to estimate the contributions of recollection (R) and automatic (A) processes to implicit memory performance. In a double-blind, placebo-controlled, within-subject design with 24 participants, single midazolam doses were administered intravenously, and word stem completion performance was used to calculate PDP estimates. A dissociation was observed such that midazolam decreased R but increased A estimates relative to placebo. Given that a manipulation that induces amnesia would not be expected to facilitate a memory process, these results add to the accumulating body of evidence suggesting that PDP estimates are not always theoretically plausible. Such evidence raises important questions about the use of the PDP.
authors.affiliation: Department of Psychiatry and Behavioral Sciences, Behavioral Biology Research Center, Johns Hopkins University School of Medicine, 5510 Nathan Shock Drive, Baltimore, MD 21224, USA. mmintzer@jhmi.edu
authors.forename: Miriam Z
authors.initials: MZ
authors.lastname: Mintzer
authors.forename: Roland R
authors.initials: RR
authors.lastname: Griffiths
authors.forename: Elliot
authors.initials: E
authors.lastname: Hirshman
mesh_terms: D000328:Adult; D018592:Cross-Over Studies; D004305:Dose-Response Relationship, Drug; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D006993:Hypnotics and Sedatives / Q000008:administration & dosage / Q000494:pharmacology*; D007262:Infusions, Intravenous; D008297:Male; D008568:Memory / Q000187:drug effects* / Q000502:physiology; D011939:Mental Recall / Q000187:drug effects / Q000502:physiology; D008874:Midazolam / Q000008:administration & dosage / Q000494:pharmacology*; D008875:Middle Aged; D013647:Task Performance and Analysis
chemical_list: D006993:Hypnotics and Sedatives; D008874:Midazolam