Double Blind Experiment

The effects of Adding Meperidine to Heavy Intrathecal Lidocaine on Hemodynamic Changes and Blood Loss in Open Prostatectomy: A Randomized Double-Blind Clinical Trial

Background: Clinical investigations have reported several anesthetic properties of intrathecal injections of meperidine. The purpose of this study was to investigate the effect of adding meperidine to intrathecal heavy lidocaine on hemodynamic changes and blood loss in patients undergoing elective suprapubic open prostatectomy. Methods: In a randomized double-blind clinical trial, 77 pa...

Low Level Laser Therapy in Treatment of Diabetic Foot Ulcers: Double Blind Controlled Clinical Trial

Double voter perceptible blind signature based electronic voting protocol

Mu et al. have proposed an electronic voting protocol and claimed that it protects anonymity of voters, detects double voting and authenticates eligible voters. It has been shown that it does not protect voter's privacy and prevent double voting. After that, several schemes have been presented to fulfill these properties. However, many of them suffer from the same weaknesses. In this p...

An examination of the effect of messages on cooperation under double-blind and single-blind payoff procedures

Previous research has suggested that communication and especially promises increase cooperation in laboratory experiments. This has been taken as evidence for internal motivations such as guilt aversion or preference for promise keeping. The goal of this paper was to examine messages under a double-blind payoff procedure to test the alternative explanation that promise keeping is due to externa...

Non-reciprocal altruism in dictator games

We carry out a double blind dictator game experiment where the anonymous recipients are randomly drawn from the Swedish general population, and any donations are mailed to the recipients. About a third of the subjects donate some money.  2000 Elsevier Science S.A. All rights reserved.