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Related Concept Videos

Review and Preview01:13

Review and Preview

Data are individual items of information obtained from a population or sample. Data may be classified as qualitative (categorical), quantitative continuous, or quantitative discrete. Because it is not practical to measure the entire population in a study, researchers use samples to represent the population. A random sample is a representative group from the population chosen by using a method that gives each individual in the population an equal chance of being included in the sample. Random...
Review and Preview01:10

Review and Preview

In statistics, several tools are used to interpret the data. Measures of central tendency represent the characteristics of the data, such as mean, median, and mode. Additionally, measures of variance like standard deviation and range are used to find the spread of data from the mean. Relative standing measures the distance between data locations. Commonly used measures of relative standings are percentile, z score, and quartiles.
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Electrocyclic reactions, cycloadditions, and sigmatropic rearrangements are concerted pericyclic reactions that proceed via a cyclic transition state. These reactions are stereospecific and regioselective. The stereochemistry of the products depends on the symmetry characteristics of the interacting orbitals and the reaction conditions. Accordingly, pericyclic reactions are classified as either symmetry-allowed or symmetry-forbidden. Woodward and Hoffmann presented the selection criteria for...
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Related Experiment Video

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A Novel Single Animal Motor Function Tracking System Using Simple, Readily Available Software
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A Novel Single Animal Motor Function Tracking System Using Simple, Readily Available Software

Published on: August 31, 2018

Prior-entry: a review.

Charles Spence1, Cesare Parise

  • 1Crossmodal Research Laboratory, Department of Experimental Psychology, University of Oxford, Oxford, United Kingdom. charles.spence@psy.ox.ac.uk

Consciousness and Cognition
|January 9, 2010
PubMed
Summary
This summary is machine-generated.

The law of prior entry demonstrates that attended stimuli reach consciousness faster than unattended ones. Recent evidence confirms this attention-based effect, clarifying century-old research.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Psychophysics

Background:

  • The law of prior entry, a fundamental law of attention proposed by E.B. Titchener, posits that attended objects enter consciousness faster than unattended ones.
  • Over a century of research, methodological confounds have obscured whether prior entry effects stem from attention, response biases, or sensory facilitation.

Purpose of the Study:

  • To review the literature on the prior-entry effect.
  • To highlight methodological confounds in prior research.
  • To summarize current consensus and outline future research questions.

Main Methods:

  • Review of existing literature on the prior-entry effect.
  • Analysis of methodological confounds in previous studies.
  • Examination of recent psychophysical and electrophysiological evidence.

Main Results:

  • Recent research provides compelling psychophysical and electrophysiological evidence supporting the prior-entry effect.
  • Attending to sensory modality, location, or feature speeds the arrival of attended stimuli into consciousness.
  • Prior-entry effects are observed with both endogenous and exogenous attention orienting.

Conclusions:

  • The prior-entry effect is a genuine phenomenon supported by modern research.
  • Understanding the prior-entry effect requires careful methodological control to distinguish attentional effects from confounds.
  • Future research should continue to explore the neural and behavioral mechanisms underlying the prior-entry effect.