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Related Concept Videos

Microbial Growth Measurement: Indirect Methods01:27

Microbial Growth Measurement: Indirect Methods

Estimating microbial growth is essential for understanding population dynamics and environmental adaptations. Indirect methods provide valuable insights by measuring parameters such as turbidity, metabolic activity, and biomass, enabling efficient and reproducible assessments.During exponential growth, microbial cells scatter light proportionally to their biomass, a principle used in turbidity measurements. About one million cells per milliliter produce detectable scattering, which a...
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Microbial Growth Measurement: Direct Methods

Direct methods for measuring microbial populations in a culture are essential tools in microbiology, providing quantitative data for various applications. Among these, microscopic counts, plate counts, and serial dilution are widely used techniques, each with unique principles and applications.Microscopic CountsMicroscopic counting involves the use of a Petroff-Hausser chamber, a specialized microscope slide with a grid and defined depth. By observing a liquid culture under a microscope,...
Binet's Contribution to Measures of Intelligence01:23

Binet's Contribution to Measures of Intelligence

Alfred Binet, along with his student Théophile Simon, was tasked by the French Ministry of Education in 1904 to create a method for identifying students who struggled to learn through conventional classroom instruction. This initiative aimed to address overcrowding by placing such students in specialized schools. Binet and Simon developed an intelligence test comprising 30 tasks, ranging from simple commands, like touching one's nose or ear, to more complex tasks, such as drawing designs from...
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Related Experiment Video

Updated: Jun 24, 2026

Measuring the Functional Abilities of Children Aged 3-6 Years Old with Observational Methods and Computer Tools
11:29

Measuring the Functional Abilities of Children Aged 3-6 Years Old with Observational Methods and Computer Tools

Published on: June 20, 2020

Tools for measuring academic growth.

G Gage Kingsbury1, Martha McCall, Carl Hauser

  • 1Northwest Evaluation Association, Lake Oswego, OR 97035, USA. gage.kingsbury@nwea.org

Journal of Applied Measurement
|March 21, 2009
PubMed
Summary
This summary is machine-generated.

Measuring academic growth is crucial for student learning. New tools like the Rasch model and computerized adaptive testing enable better growth measurement and modeling for educators.

Related Experiment Videos

Last Updated: Jun 24, 2026

Measuring the Functional Abilities of Children Aged 3-6 Years Old with Observational Methods and Computer Tools
11:29

Measuring the Functional Abilities of Children Aged 3-6 Years Old with Observational Methods and Computer Tools

Published on: June 20, 2020

Area of Science:

  • Educational Measurement
  • Psychometrics
  • Learning Sciences

Background:

  • Recent policy changes, like incorporating growth into No Child Left Behind, have increased interest in growth measurement.
  • Developing effective methods for measuring and modeling student academic growth is a significant challenge in education.

Purpose of the Study:

  • To investigate key aspects of academic growth measurement.
  • To explore the development of vertical scales and instruments for measuring growth.
  • To examine techniques for modeling individual student growth and its classroom applications.

Main Methods:

  • Utilizes the Rasch model for developing vertical scales.
  • Incorporates computerized adaptive testing for efficient data collection.
  • Focuses on statistical procedures for individual student growth modeling.

Main Results:

  • Advanced measurement tools facilitate high-quality data collection for growth assessment.
  • The study addresses challenges in designing instruments for academic growth.
  • Techniques for modeling individual student growth are explored.

Conclusions:

  • The Rasch model and computerized adaptive testing are valuable for measuring and modeling student growth.
  • Growth information, presented in norm-referenced and standards-referenced formats, can improve educational practices.
  • Enhanced ability for educators to enrich student learning through better growth insights.