Experimental Design Concepts
6 Questions
6 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is a confounding variable?

  • When an experimenter cannot distinguish the effects of different factors on a variable (correct)
  • When a subject reacts favorably to a placebo
  • When a subject is aware of the treatment being given
  • When subjects are randomly assigned to treatment groups

    • What is the placebo effect?

  • When a subject reacts favorably to a placebo when no medicated treatment has been given (correct)
  • When an experimenter cannot distinguish the effects of different factors on a variable
  • When a subject is aware of the treatment being given
  • When subjects are randomly assigned to treatment groups

    • What is blinding in an experiment?

  • When a subject is aware of the treatment being given
  • A technique used to make the subjects unaware of which treatment or placebo they are being given (correct)
  • When subjects are randomly assigned to treatment groups
  • When an experimenter cannot distinguish the effects of different factors on a variable

    • What is a double-blind experiment?

    <p>When neither the experimenter nor the subjects know which treatment is being given</p> Signup and view all the answers

    What is a completely randomized design?

    <p>A process of randomly assigning subjects to different treatment groups</p> Signup and view all the answers

    What is a randomized block design?

    <p>A design used to ensure that subjects with certain characteristics are assigned to each treatment</p> Signup and view all the answers

    Study Notes

    Experimental Design

    • A confounding variable occurs when an experimenter cannot distinguish between the effects of different factors on a variable.

    Placebo Effect and Blinding

    • The placebo effect: a subject reacts favorably to a placebo when no medicated treatment has been given.
    • Blinding: a technique that makes subjects unaware of the treatment (or placebo) they receive.

    Types of Experiments

    • Double-blind experiment: neither the experimenter nor the subjects know which treatment is being given.

    Randomization Techniques

    • Completely randomized design: assigns subjects to different treatment groups through random assignment.
    • Randomized block design: ensures subjects with certain characteristics are assigned to each treatment.

    Design Examples

    • Randomized block design example: split subjects into groups according to gender or age, then randomly assign each group to different treatments.

    Matched Pairs Design

    • Pairs up subjects according to similarities.
    • One subject in the pair receives one treatment, while the other receives a different treatment.

    Experimental Basics

    • Sample size: the number of participants in the experiment.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Description

    Test your knowledge on experimental design concepts, including confounding variables, placebo effect, blinding, and double-blind experiments.

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser