Scientific Method

Peer Review Process — Learn how peer review works in scientific publications. See the pros and cons and understand the steps for peer reviewed articles.

Understanding Peer Review in Science

This entry was posted on May 2, 2023 by Anne Helmenstine (updated on May 9, 2023)

Control Group in an Experiment — Get the control group definition and examples in an experiment. Learn how the control group differs from the a control variable.

Control Group Definition and Examples

This entry was posted on February 28, 2023 by Anne Helmenstine (updated on March 7, 2023)

Placebo Effect — Learn what the placebo effect is, how it works, and its uses in scientific research, medicine, and psychology.

Placebo Effect – What It Is and How It Works

This entry was posted on February 26, 2023 by Anne Helmenstine (updated on March 1, 2023)

Single Blind vs Double Blind Study — Learn what a double blind study is and how it differs from a single blind or triple blind study. See the value and limitations of blinding.

Double Blind Study – Blinded Experiments

This entry was posted on January 4, 2023 by Anne Helmenstine (updated on February 26, 2023)

Experiment Definition in Science — Get the experiment definition in science and see an example of what a science experiment is (and is not). Know the types of experiments.

Experiment Definition in Science – What Is a Science Experiment?

This entry was posted on January 1, 2023 by Anne Helmenstine (updated on February 28, 2023)

Types of Variables in Science — Learn about the types of variables in science experiments. Get examples and learn how to identify each variable.

Types of Variables in Science Experiments

This entry was posted on December 4, 2022 by Anne Helmenstine (updated on February 28, 2023)

Scientific Law vs Scientific Theory — Learn what a scientific law is. Get the definition and examples and learn how a scientific law differs from a scientific theory.

Scientific Law Definition and Examples

This entry was posted on November 29, 2022 by Anne Helmenstine (updated on December 14, 2022)

Scientific Theory Definition — Get the scientific theory definition and examples. Understand theory uses and limitations. Learn how a theory differs from a law in science.

Scientific Theory Definition and Examples

This entry was posted on July 23, 2022 by Anne Helmenstine (updated on January 1, 2023)

Null Hypothesis Example — Get null hypothesis examples. Learn the difference between the null hypothesis and alternative hypothesis.

Null Hypothesis Examples

This entry was posted on October 26, 2020 by Anne Helmenstine (updated on February 26, 2023)