Related Experiment Video
Updated: Apr 24, 2026
06:46
Automated, Long-term Behavioral Assay for Cognitive Functions in Multiple Genetic Models of Alzheimer's Disease, Using IntelliCage
Published on: August 4, 2018
11.4K
Development of the Biological Experimental Design Concept Inventory (BEDCI)
Thomas Deane1, Kathy Nomme2, Erica Jeffery1
1*Departments of Botany and Zoology, Biology Program, Faculty of Science, University of British Columbia, Vancouver, BC V6T 1Z4, Canada.
CBE Life Sciences Education
|September 4, 2014
Summary
A new Biology Experimental Design Concept Inventory (BEDCI) tool effectively diagnoses student understanding of experimental design. While students showed learning gains, some non-expert thinking persisted, highlighting the need for targeted teaching strategies.
Area of Science:
- Biology Education Research
- Cognitive Science in STEM
Background:
- Student understanding of experimental design is crucial for scientific literacy.
- Existing tools may not adequately diagnose specific misconceptions in biology experimentation.
Purpose of the Study:
- To develop and validate a concept inventory (CI) for assessing student understanding of experimental design in biology.
- To diagnose non-expert-like thinking in undergraduate biology students.
- To evaluate the effectiveness of pedagogical strategies aimed at conceptual change.
Main Methods:
- Developed the 14-question Biology Experimental Design Concept Inventory (BEDCI) following CI design best practices.
- Administered BEDCI as a pre- and posttest to 580 undergraduate students across five biology courses.
- Analyzed question difficulty, discrimination, and response correlations to assess reliability and validity.
Main Results:
- BEDCI demonstrated effective difficulty and discrimination metrics for capturing undergraduate learning changes.
- High correlation (r = 0.84) between student responses indicated test reliability.
- Students exhibited significant learning gains, yet widespread non-expert-like responses remained persistent.
Conclusions:
- The BEDCI is a reliable and valid diagnostic instrument for assessing experimental design understanding in life sciences.
- The tool can identify specific student misconceptions and evaluate the impact of teaching interventions.
- Further research can utilize BEDCI to refine instructional approaches for experimental design in biology.
More Related Videos
Related Concept Videos
01:15Bioequivalence Experimental Study Designs: Repeated Measures, Cross-Over, Carry-Over, and Latin Square Designs
413
Bioequivalence experimental study designs play a pivotal role in testing the effectiveness of various treatments. Key among these are the repeated measures, cross-over, carry-over, and Latin square designs. In the repeated measures design, each subject receives all treatments, allowing for temporal comparisons. This type of design is useful in reducing variability but requires careful planning to avoid bias.The cross-over design, an economical method, involves sequential administration of...
413
01:16Experimental Designs
11.3K
An experimental design is a systematic process that allows researchers to evaluate the relationship between dependent and independent variables. There are three widely used types of experimental design - pre-experimental design, true experimental design, and quasi-experimental design. In pre-experimental design, the researcher compares the data before and after some interventions or treatments. The true-experimental design has more than one purposefully created group, a commonly measured...
11.3K
01:20Bioequivalence Experimental Study Designs: Completely Randomized and Randomized Block Designs
407
Bioequivalence experimental study designs are crucial methodologies used in evaluating and comparing the bioavailability of different drug products. These designs are categorized into various types: completely randomized, randomized block, repeated measures, cross and carry-over, and Latin square designs.Completely randomized designs involve randomly allocating treatments to all subjects participating in the experiment. This allocation is achieved by assigning unique random numbers to subjects...
407
01:23Behavioral Genetics and Its Designs
1.4K
Behavior genetics explores how genetic inheritance influences human behavior. It focuses on how genes, passed from parents to offspring, contribute to the development of behavioral traits and tendencies. This branch of genetics seeks to understand the complex interplay between inherited genetic factors and environmental influences in shaping our behaviors.
The primary methodologies used in behavior genetics include family studies, twin studies, and adoption studies, each providing unique...
The primary methodologies used in behavior genetics include family studies, twin studies, and adoption studies, each providing unique...
1.4K
01:13Controls in Experiments
13.1K
When conducting an experiment, it is crucial to have control to reduce bias and accurately measure the dependent variables. It also marks the results more reliable. Controls are elements in an experiment that have the same characteristics as the treatment groups but are not affected by the independent variable. By sorting these data into control and experimental conditions, the relationship between the dependent and independent variables can be drawn. A randomized experiment always includes a...
13.1K
01:13Data Collection by Experiments
24.5K
Data collection is a systematic method of obtaining, observing, measuring, and analyzing accurate information. An experimental study is a standard method of data collection that involves the manipulation of the samples by applying some form of treatment prior to data collection. It refers to manipulating one variable to determine its changes on another variable. The sample subjected to treatment is known as “experimental units.”
An example of the experimental method is a public...
An example of the experimental method is a public...
24.5K