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Related Concept Videos

What is an Experiment?01:12

What is an Experiment?

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An experiment is a planned activity carried out under controlled conditions. The purpose of an experiment is to investigate the relationship between two variables. When one variable causes change in another, we call the first variable the explanatory or independent variable. The affected variable is called the response or dependent variable. In a randomized experiment, the researcher manipulates values of the explanatory variable and measures the resulting changes in the response variable. The...
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When conducting an experiment, it is crucial to have control to reduce bias and accurately measure the dependent variables. It also marks the results more reliable. Controls are elements in an experiment that have the same characteristics as the treatment groups but are not affected by the independent variable. By sorting these data into control and experimental conditions, the relationship between the dependent and independent variables can be drawn. A randomized experiment always includes a...
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The randomization process involves assigning study participants randomly to experimental or control groups based on their probability of being equally assigned. Randomization is meant to eliminate selection bias and balance known and unknown confounding factors so that the control group is similar to the treatment group as much as possible. A computer program and a random number generator can be used to assign participants to groups in a way that minimizes bias.
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Related Experiment Video

Updated: Jan 21, 2026

Electrically Evoked Stapedius Reflex Measurements in Cochlear Implantation and Its Application in the Postoperative Fitting Process
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[First experiences with Cochlear Implant Function Index (CIFI) in Hungary].

Gréta Bodzai1, Márton Kovács1, János Uzsaly1

  • 1Klinikai Központ, Fül-, Orr-, Gégészeti és Fej-, Nyaksebészeti Klinika, Pécsi Tudományegyetem, Általános Orvostudományi Kar Pécs, Munkácsy M. u. 2., 7621.

Orvosi Hetilap
|August 13, 2019
PubMed
Summary

The Cochlear Implant Function Index (CIFI) questionnaire significantly improved the quality of life for cochlear implant patients. Improvements were noted at 6 months and further enhanced by 12 months post-implantation.

Keywords:
cochlear implantationcochlearis implantációhallásrehabilitációhearing rehabilitationquality of lifesensorineural hearing losssensorineuralis halláscsökkenéséletminőség

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Area of Science:

  • Otolaryngology
  • Audiology
  • Quality of Life Research

Background:

  • Cochlear implantation outcomes are assessed using audiological data and quality of life surveys.
  • A validated tool is needed to comprehensively evaluate the impact of cochlear implants on patients' overall well-being.

Purpose of the Study:

  • To translate and validate the Cochlear Implant Function Index (CIFI) for assessing physical, psychological, and social status in cochlear implant recipients.
  • To establish the CIFI as a reliable measure for tracking patient progress after cochlear implantation.

Main Methods:

  • The study involved 30 patients undergoing cochlear implantation.
  • The translated CIFI questionnaire was administered pre-operatively and at 6 and 12 months post-implantation.
  • Data analysis focused on changes in physical, psychological, and social well-being.

Main Results:

  • A significant improvement in the quality of life was observed in a majority of patients within 6 months of cochlear implantation.
  • Continued positive trends in quality of life were documented at the 12-month follow-up.
  • The CIFI demonstrated sensitivity to changes in patient-reported outcomes.

Conclusions:

  • The translated CIFI is an effective tool for evaluating the multifaceted impact of cochlear implantation.
  • Cochlear implantation leads to substantial quality of life enhancements, observable as early as 6 months post-surgery.
  • Long-term follow-up using the CIFI can further elucidate the sustained benefits of cochlear implants.