Related Experiment Video
Updated: Jun 28, 2026

05:02
Comparing Bibliometric Analysis Using PubMed, Scopus, and Web of Science Databases
Published on: October 24, 2019
Z factor: a new index for measuring academic research output
Molecular Pain
|November 11, 2008
Summary
A new metric, the Z factor, is proposed to evaluate recent academic performance. This unbiased method is crucial for assessing researchers and grant awardees amid increasing funding competition.
Area of Science:
- Bibliometrics and Scientometrics
- Research Evaluation
- Academic Performance Metrics
Background:
- Increasing competition for research funding necessitates unbiased evaluation of scientist performance.
- Existing metrics may not adequately capture recent academic productivity, especially for early-career investigators.
- Funding agencies require reliable methods to assess the quality and productivity of grant applicants.
Discussion:
- The proposed Z factor offers a novel approach to measuring recent academic performance.
- This metric aims to provide an unbiased assessment, addressing limitations of current evaluation methods.
- The Z factor is particularly relevant for evaluating young independent investigators and grant awardees.
Key Insights:
- The Z factor provides a quantitative measure of recent academic output.
- It addresses the need for an unbiased assessment in a competitive funding landscape.
- This metric can aid funding agencies in making informed decisions.
Outlook:
- The Z factor has the potential to become a standard tool for academic performance evaluation.
- Further validation and adoption of the Z factor could enhance research funding allocation.
- This metric may influence how early-career researchers are assessed and supported.
Related Concept Videos
Introduction to z Scores
A z score (or standardized value) is measured in units of the standard deviation. It indicates how many standard deviations the value x is above (to the right of) or below (to the left of) the mean, μ. Values of x that are larger than the mean have positive z scores, and values of x that are smaller than the mean have negative z scores. If x equals the mean, then x has a zero z score. It is important to note that the mean of the z scores is zero, and the standard deviation is one.
z scores help...
z scores help...
Introduction to z Scores
A z score (or standardized value) is measured in units of the standard deviation. It tells you how many standard deviations the value x is above (to the right of) or below (to the left of) the mean, μ. Values of x that are larger than the mean have positive z scores, and values of x that are smaller than the mean have negative z scores. If x equals the mean, then x has a zero z score. It is important to note that the mean of the z scores is zero, and the standard deviation is one.
z scores help...
z scores help...
z Scores and Unusual Values
The z score is one of the three measures of relative standing. It describes the location of a value in a dataset relative to the mean. z scores are obtained after the standardization of the values in a dataset. The z score for the mean is 0.
This score indicates how far a value is from the mean in terms of standard deviation. For example, if a data value has a z score of +1, the researcher can infer that the particular data value is one standard deviation above the mean. If another data value...
This score indicates how far a value is from the mean in terms of standard deviation. For example, if a data value has a z score of +1, the researcher can infer that the particular data value is one standard deviation above the mean. If another data value...
F Distribution
The F distribution was named after Sir Ronald Fisher, an English statistician. The F statistic is a ratio (a fraction) with two sets of degrees of freedom; one for the numerator and one for the denominator. The F distribution is derived from the Student's t distribution. The values of the F distribution are squares of the corresponding values of the t distribution. One-Way ANOVA expands the t test for comparing more than two groups. The scope of that derivation is beyond the level of this...
z Scores and Area Under the Curve
z scores are the standardized values obtained after converting a normal distribution into a standard normal distribution. A z score is measured in units of the standard deviation. The z score tells you how many standard deviations the value x is above (to the right of) or below (to the left of) the mean, μ. Values of x that are larger than the mean have positive z scores, and values of x that are smaller than the mean have negative z scores. If x equals the mean, then x has a z score of zero.
Factors Affecting Activity Coefficient
The extended Debye-Hückel equation indicates that the activity coefficient of an ion in an aqueous solution at 25°C depends on three partially interdependent properties: the ionic strength of the solution, the charge of the ion, and the ion size.
The activity coefficient value for an ion is close to one when the solution has almost zero ionic strength, i.e., when the solution shows close to ideal behavior. As the ionic strength of the solution increases from 0 to 0.1 mol/L, a decrease in the...
The activity coefficient value for an ion is close to one when the solution has almost zero ionic strength, i.e., when the solution shows close to ideal behavior. As the ionic strength of the solution increases from 0 to 0.1 mol/L, a decrease in the...

