| Titre : | Placebo effects in hearing-aid trials are reliable (2013) |
| Auteurs : | Piers Dawes ; Rachel Hopkins ; Kevin J. Munro |
| Type de document : | Article |
| Dans : | International Journal of Audiology IJA (Vol.52, n°7, July 2013) |
| Langues: | Anglais |
| Résumé : | Objective: A recent study suggested that placebo effects are a source of bias in non-blinded hearing-aid trials. Given the potential impact of this finding on the interpretation of non-blinded trials and design of future research trials, the objective of the present study was to investigate the reliability of this effect. Design: Using the same procedure as an earlier study, participants were told that they were taking part in a trial of new hearing-aid technology. Participants compared two devices that were acoustically identical, except one was described as “new” and the other as “conventional”. Participants completed a speech-in-noise test, sound quality ratings, and rated overall personal preference for both hearing aids. Study sample: Sixteen adult hearing-aid users. Results: Participants had significantly better mean speech-in-noise performance (70.9% versus 66.8%, Z = 2.30, p = 0.02, effect size Pearson's r = 0.15) and sound quality ratings for the “new” hearing aid (8.1 versus 7.4, Z = − 2.99, p = 0.003, r = 0.28). A significant proportion of participants (75%) expressed an overall preference for the “new” hearing aid (p = 0.001, effect size φc = 0.66). Conclusion: Placebo effects reliably impact on hearing-aid trials. In order to control for placebo effects, double-blind methodology is optimal. However, when double-blinding is not possible other strategies may be appropriate. |
| Disponible en ligne : | Oui |
| En ligne : | https://login.ezproxy.vinci.be/login?url=https://www.tandfonline.com/doi/full/10.3109/14992027.2013.783718 |
Exemplaires (1)
| Cote | Support | Localisation | Section | Disponibilité |
|---|---|---|---|---|
| International journal of audiology IJA. Vol.52, n°7 (July 2013) | Périodique papier | Ixelles | Rez | Consultation sur place uniquement Exclu du prêt |
