Lab Component Introduction
Lab Component Introduction - Related Videos
10:44
An Introduction to Worm Lab: from Culturing Worms to Mutagenesis
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Cited by 27 •
2011
Screening for mutants with phenotypic defects is a straightforward method for identifying genes that function in a given biological process. In this article we describe how to culture free living worms (e.g., Pristionchus pacificus) in the laboratory and show two different mutagenesis methods, EMS and TMP/UV.
09:52
Common Lab Glassware and Uses
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2023
Source: Laboratory of Dr. Neal Abrams — SUNY College of Environmental Science and Forestry Glassware is a regular appearance in the professional chemistry laboratory, because it has a relatively low cost, extreme durability, and specific levels of precision. While some labware is being supplemented with plastic or even everyday kitchen materials, glass is still the standard material by which laboratory work is done. While there are few rules about glassware, there are some best practices for...
04:14
Lab Techniques - Concepts
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2020
Measurement Accuracy The ability to repeat an experiment and get the same results, or reproducibility, is essential in scientific research. However, it’s impossible to repeat an experiment if you don’t know how you did it. Thus, scientists keep detailed records of their experiments in lab notebooks. These records include important information like the amount of each material used and descriptions of each step of the procedure. Equipment, like balances and volumetric or graduated glassware, is...
01:21
Lab Techniques - Instructor Prep
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2020
Source: Smaa Koraym at Johns Hopkins University, MD, USA Preparation of LaboratoryExpand Here we show the laboratory preparation for 10 students working individually, with some excess. Please adjust quantities as needed. To set up for this lab experiment, wear the appropriate personal protective equipment, including a lab coat, chemical splash goggles, and gloves. Obtain enough small plastic bottles with caps for the number of students and label them ‘NaCl’. Use a...
08:53
Lab Techniques - Student Protocol
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2020
Source: Smaa Koraym at Johns Hopkins University, MD, USA Determining the Density of an EggExpand Density is a measure of how compact a substance or object is, and it is calculated as mass divided by volume. When a dense object is placed in a liquid with a lower density, the object sinks; when the object is less dense than the liquid, it floats. When the densities are the same, the object will be suspended in the liquid. In this experiment, we'll determine the density of an egg by creating a...
FAQs
Operationalization converts broad ideas, such as cognition or mental health, into variables that researchers can observe or measure. This step links a testable hypothesis to specific data-collection decisions and makes the investigation more systematic. Clear operational definitions also support evidence-based interpretation because conclusions can be evaluated against the behaviors or measurements actually recorded.
Controlled conditions help researchers examine whether observed behavioral patterns relate to the variables specified in the investigation rather than to uncontrolled differences in the research setting. Consistent procedures improve the comparability of observations across participants or trials. This supports more disciplined analysis and helps students evaluate how experimental design affects the strength of psychological conclusions.
Quantitative methods represent findings through numerical data that can be analyzed for measurable patterns, whereas qualitative methods support interpretation of descriptive or nonnumeric information. Choosing between them depends on the type of evidence needed for the investigation. Together, these approaches help psychology learners connect data analysis with the complexity of cognition, behavior, development, and human interaction.
A typical investigation begins with a testable hypothesis, followed by operationalizing variables and planning conditions for observation. Learners then collect behavioral data, analyze the results with quantitative or qualitative methods, and interpret the evidence in relation to the hypothesis. The final stage involves communicating the reasoning, findings, and limitations clearly so the work can be evaluated scientifically.
Research ethics guide how psychological investigations are planned, conducted, and communicated. They are considered alongside measurement, data collection, and interpretation rather than treated as separate from scientific design. Including ethics in lab work helps learners recognize that producing psychological knowledge requires responsible procedures and careful reporting, particularly when investigations concern behavior, mental health, or human interaction.
Practical investigations build skills in measurement, experimental design, behavioral observation, data analysis, and scientific communication. Working through these stages gives learners opportunities to connect abstract principles with evidence and to judge how results support or challenge a hypothesis. These skills apply across psychological areas including cognition, development, mental health, behavior, and human interaction.