Significance Threshold
Significance Threshold - Related Videos
06:48
The Staircase Procedure for Finding a Perceptual Threshold
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2023
Source: Laboratory of Jonathan Flombaum—Johns Hopkins University Psychophysics is the name for a set of methods in perceptual psychology designed in order to relate the actual intensity of stimuli to their perceptual intensity. One important aspect of psychophysics involves the measurement of perceptual thresholds: How bright does a light need to be for a person to be able to detect it? How little pressure applied to the skin is detectable? How soft can a sound be and still be heard? Put...
01:21
Significance of Marketing
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2024
Marketing is a pivotal, multifaceted function that acts as a strategic bridge between businesses and customers, extending beyond advertising and sales to contribute significantly to organizational success. Marketing guides businesses in: Market Understanding: This involves extensive research to comprehend the target audience's needs, forming the basis for product development, pricing, and communication strategies. Customer Acquisition & Retention: It plays a pivotal role in attracting...
01:37
Statistical Significance
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2026
Once data is collected from both the experimental and the control groups, a statistical analysis is conducted to find out if there are meaningful differences between the two groups. A statistical analysis determines how likely any difference found is due to chance (and thus not meaningful). In psychology, group differences are considered meaningful, or significant, if the odds that these differences occurred by chance alone are 5 percent or less. Stated another way, if we repeated this...
05:45
Rapid Determination of the Thermal Nociceptive Threshold in Diabetic Rats
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Cited by 10 •
2012
Here, we describe a rapid reliable and simple procedure to determine the lowest temperature at which rats or mice show nocifensive behavior, i.e. the thermal nociceptive threshold (TNT). This method applies a slowly increasing thermal stimulus allowing precise and reproducible estimation of TNTs with minimum, if any, stress to the animals.
01:12
Significance of Center of Mass
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2023
The center of mass of an object is defined as the mass-weighted average position of all the particles that comprise the object. The significance of the center of mass of an object can be seen by looking at its dynamics. The time derivative of the center of mass gives its velocity, assuming that the object's mass remains constant over time. Furthermore, the total linear momentum of an object can be seen as the linear momentum of a single particle of the object's total mass moving with the...
FAQs
The threshold provides a preset comparison point for the p-value. When the p-value is at or below the selected alpha level, researchers label the result statistically significant because the observed data are considered statistically unusual under the null hypothesis. This label supports a decision about evidence, but it does not describe the size or practical value of the finding.
Predetermining the threshold establishes the decision rule before researchers see the analysis results. Reporting that choice improves transparency and makes it clearer how the evidence was evaluated. In psychological research, stating the alpha level in advance helps readers distinguish a planned inferential standard from a cutoff selected after viewing the data, which could otherwise complicate interpretation.
A result can meet the significance threshold without showing a large or meaningful effect. The threshold addresses whether the data provide sufficient evidence against the null hypothesis, not whether the finding matters in practice. Researchers therefore need effect size and confidence intervals to judge the magnitude and precision of an observed psychological result alongside its p-value.
The overview identifies 0.05 as a commonly used alpha level, but the important requirement is that the threshold be predetermined and reported. A comparison with 0.05 alone cannot show that a finding is practically important. Interpretation should also consider confidence intervals, effect size, sample size, and replication evidence rather than treating one conventional cutoff as a complete evaluation.
Researchers first set and report the alpha level before analysis. After analyzing the data, they obtain a p-value and compare it with that prespecified threshold. They then describe whether the result is statistically significant and interpret that outcome with confidence intervals, effect size, sample size, and replication evidence. This workflow separates the statistical decision from broader scientific judgment.
In psychology, a threshold-based label is one part of evaluating evidence, not a final statement about a research claim. Investigators should examine the associated effect size and confidence intervals, consider the study’s sample size, and look for replication evidence. This broader context helps determine whether an apparently unusual result is robust and scientifically meaningful rather than overstating a single finding.