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Ch 3: Planning a Scientific Investigation

About This Chapter

Explore factors for consideration when designing a scientific experiment with video and text lessons on research variables, experiment parameters, control groups, and more. You'll also learn to identify the different types of experimental design.

Planning a Scientific Investigation - Chapter Summary

Review the characteristics of a well-designed scientific experiment with the help of our knowledgeable instructors. You'll take another look at how to develop a hypothesis; identify independent, dependent, and control variables; set up your experiment's parameters; and select experimental and control groups.

Instructors also weigh the pros and cons of various experimental designs - including between-groups, within-groups, single-factor, and multiple-factor designs - before outlining the effects of confounding, extraneous, and moderator variables on an experiment's outcome. By the time you finish this chapter, you should be familiar with the following:

  • The experimental design process
  • Components of a true experiment
  • Types of experimental designs
  • Effects of research variables

Instruction is delivered through short, illustrated video and text lessons that make it easy to study the steps involved in planning a scientific investigation. Transcripts with links to supplementary text lessons and self-checking quizzes are also included. Access them as many times as you need and use the video tags or lesson summaries to revisit key terms and topics of interest.

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