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Feedback Loops

Feedback Loops

In most cases, excessive hormone production is prevented by negative feedback—a loop that starts with a stimulus inducing the release of a particular substance, like a hormone, to maintain a certain level before triggering a signal that results in a decrease in further release of the hormone.

Effects of feedback

Effects of feedback

Feedback in control systems plays a critical role in shaping various operational parameters, extending beyond simple error reduction to influence stability, bandwidth, gain, impedance, and sensitivity. Understanding these effects requires examining a basic feedback system characterized by defined input, output, error, and feedback signals.
Feedback significantly modifies the gain of a control system. The gain of a system without feedback is altered by a factor of one plus GH, where G represents...

Negative and Positive Feedback

Negative and Positive Feedback

Animal organs and organ systems constantly adjust to internal and external changes through a process called homeostasis ("steady state"). Examples of these changes include regulation of the level of glucose or calcium in the blood or internal responses to external temperatures. Homeostasis requires maintaining an internal dynamic equilibrium:

Feedback Inhibition

Feedback Inhibition

Biochemical reactions are occurring constantly in cells, converting starting substances to different products, usually with the help of enzymes that speed the reactions. Without enzymes, it would take far too long for most reactions to occur to be useful to the cell!

Positive and Negative Feedback Loops

Positive and Negative Feedback Loops

Animal organs and organ systems constantly adjust to internal and external changes through a process called homeostasis ("steady state"). Examples of these changes include regulation of the level of glucose or calcium in the blood or internal responses to external temperatures. Homeostasis requires maintaining an internal dynamic equilibrium:

Hearing

Hearing

When we hear a sound, our nervous system is detecting sound waves—pressure waves of mechanical energy traveling through a medium. The frequency of the wave is perceived as pitch, while the amplitude is perceived as loudness.

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Assessment of Audio-Tactile Sensory Substitution Training in Participants with Profound Deafness Using the Event-Related Potential Technique

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Experiences with audio feedback in a veterinary curriculum.

Susan M Rhind¹, Graham W Pettigrew, Jo Spiller

¹University of Edinburgh, UK. susan.rhind@ed.ac.uk

Journal of Veterinary Medical Education

|March 9, 2013

Summary

Audio feedback in veterinary education significantly improved student satisfaction compared to traditional methods. Students found audio feedback more helpful than written comments or whole-class reviews, boosting motivation and insight.

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Area of Science:

Veterinary Education
Higher Education Pedagogy
Academic Feedback

Background:

Student satisfaction with academic feedback in UK veterinary and medical programs lags behind other disciplines.
Traditional feedback methods often fail to meet student expectations in higher education.

Purpose of the Study:

To evaluate student and faculty experiences with audio feedback in a veterinary curriculum.
To compare the effectiveness and efficiency of audio feedback against text-based and whole-class feedback.

Main Methods:

Implementation of audio feedback for laboratory practical reports and multiple-choice tests in a veterinary course.
Post-feedback electronic questionnaire surveys administered to students.
Qualitative analysis of student experiences and faculty time commitment.

Main Results:

A majority of students found audio feedback more helpful than text-based or whole-class feedback.
Audio feedback was rated more helpful than automated feedback and written comments, but less helpful than individual staff discussions.
Faculty in one course found audio feedback more efficient than handwritten feedback; a 5-hour time commitment was noted in another course.

Conclusions:

Audio feedback offers a personal and motivating approach to academic assessment in veterinary education.
It enhances students' understanding of the marking process and can be an efficient alternative to traditional feedback methods.
Further investigation into optimizing audio feedback delivery and faculty time is warranted.