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Related Concept Videos

Types of Errors: Detection and Minimization01:12

Types of Errors: Detection and Minimization

Error is the deviation of the obtained result from the true, expected value or the estimated central value. Errors are expressed in absolute or relative terms.
Absolute error in a measurement is the numerical difference from the true or central value. Relative error is the ratio between absolute error and the true or central value, expressed as a percentage.
Errors can be classified by source, magnitude, and sign. There are three types of errors: systematic, random, and gross.
Systematic or...
Random and Systematic Errors01:20

Random and Systematic Errors

Scientists always try their best to record measurements with the utmost accuracy and precision. However, sometimes errors do occur. These errors can be random or systematic. Random errors are observed due to the inconsistency or fluctuation in the measurement process, or variations in the quantity itself that is being measured. Such errors fluctuate from being greater than or less than the true value in repeated measurements. Consider a scientist measuring the length of an earthworm using a...
Random and Systematic Errors01:20

Random and Systematic Errors

Scientists always try their best to record measurements with the utmost accuracy and precision. However, sometimes errors do occur. These errors can be random or systematic. Random errors are observed due to the inconsistency or fluctuation in the measurement process, or variations in the quantity itself that is being measured. Such errors fluctuate from being greater than or less than the true value in repeated measurements. Consider a scientist measuring the length of an earthworm using a...
Systematic Error: Methodological and Sampling Errors01:15

Systematic Error: Methodological and Sampling Errors

In the case of systematic errors, the sources can be identified, and the errors can be subsequently minimized by addressing these sources. According to the source, systematic errors can be divided into sampling, instrumental, methodological, and personal errors.
Sampling errors originate from improper sampling methods or the wrong sample population. These errors can be minimized by refining the sampling strategy. Defective instruments or faulty calibrations are the sources of instrumental...
Errors occurring during blood pressure monitoring01:25

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Blood pressure monitoring is a crucial clinical procedure in diagnosing and managing various cardiovascular conditions. Despite its significance, the accuracy of blood pressure measurements can be compromised by multiple factors, potentially leading to either falsely high or low readings. These inaccuracies are critical as they can significantly impact patient care. So, it is vital to understand these challenges deeply and adopt strategic approaches to minimize errors.
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Eyewitness memory refers to the recollection of events by someone who has directly witnessed them, often serving as critical evidence in legal settings. This type of memory is commonly used in criminal cases where a witness describes details like a suspect's appearance, clothing, or behavior during a crime. However, despite its perceived reliability, eyewitness memory is prone to significant errors.
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Related Experiment Video

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Errors as a Means of Reducing Impulsive Food Choice
07:07

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Published on: June 5, 2016

Challenge and error: critical events and attention-related errors.

James Allan Cheyne1, Jonathan S A Carriere, Grayden J F Solman

  • 1Department of Psychology, University of Waterloo, Waterloo, Ontario, Canada. acheyne@uwaterloo.ca

Cognition
|August 25, 2011
PubMed
Summary

Errors can lead to more errors by causing attention lapses. This study shows task challenges increase errors and slow responses, especially after difficult trials, highlighting a cycle of performance errors.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human Performance

Background:

  • Attention lapses are a significant factor in everyday errors and accidents.
  • A bidirectional model suggests errors cause attention lapses, which in turn lead to more errors, creating a negative spiral.

Purpose of the Study:

  • To investigate the challenge-induced error↔attention-lapse model.
  • To examine how task challenges and prior performance influence attention lapses and errors.

Main Methods:

  • Utilized the Sustained Attention to Response Task (SART), a GO-NOGO paradigm.
  • Monitored response speed and commission errors in relation to task challenges and previous NOGO trial performance.

Main Results:

  • Response speed and commission errors following task challenges were influenced by temporal distance from, and prior performance on, NOGO trials.
  • Evidence supports the link between task challenges, errors, and subsequent attention lapses.

Conclusions:

  • Findings support the bidirectional error↔attention-lapse model in the context of sustained attention tasks.
  • Results have implications for understanding conflict monitoring and control models in cognitive psychology.