The Science of Instruction – Chapter Summary

Overview

• The chapter explores the research behind evidence-based principles of multimedia learning, focusing on how to design instructional materials that enhance learning by leveraging both words and visuals. Mayer provides an overview of how his research employs experimental comparisons to determine the effectiveness of multimedia instructional methods. The goal is to contribute to the science of instruction by identifying principles grounded in both research evidence and learning theory.

Key Concepts

• Science of Instruction:

  • Focuses on creating evidence-based principles for helping people learn.

  • Aims to determine what works in multimedia instruction through rigorous research.

• Evidence-Based Practice:

  • Instructional practices should be based on research evidence rather than opinion or tradition.

  • Mayer’s research involves scores of experimental comparisons over two decades to identify effective methods.

• Multimedia Instructional Messages:

  • Defined as communications using words and pictures intended to promote learning.

  • Examples include book-based (text + illustrations) and computer-based (narration + animation) lessons.

Learning Outcomes and Tests

• Retention Tests: Measure the ability to remember information (e.g., recalling steps in a process).

• Transfer Tests: Measure the ability to apply knowledge to new situations (e.g., solving novel problems).

• Focus on Transfer: Mayer emphasizes transfer tests as they assess deeper understanding and problem-solving ability.

Principles of Multimedia Design

• Coherence:

  • Exclude extraneous material that does not support learning objectives.

  • Example: Avoid irrelevant images, sounds, or text.

• Signaling:

  • Highlight essential material to direct attention to key information.

  • Example: Use arrows, bold text, or verbal emphasis.

• Redundancy:

  • Avoid presenting the same information in multiple formats simultaneously.

  • Example: Use narration + visuals instead of narration + visuals + on-screen text.

• Spatial Contiguity:

  • Place related words and images close together on the screen or page.

  • Example: Place labels next to corresponding parts of a diagram.

• Temporal Contiguity:

  • Present corresponding visuals and narration simultaneously rather than separately.

  • Example: Synchronize animations with spoken explanations.

• Segmenting:

  • Break lessons into learner-paced segments rather than presenting them as a continuous stream.

  • Example: Allow learners to control the pace of an animation or video.

• Pre-training:

  • Provide pre-training on key concepts before presenting the full lesson.

  • Example: Teach the names and functions of parts of a system before explaining how the system works.

• Modality:

  • Use graphics + narration instead of graphics + on-screen text.

  • Example: Explain a diagram with spoken words rather than written text.

• Multimedia:

  • Use words + pictures rather than words alone.

  • Example: Combine text with diagrams or animations.

• Personalization:

  • Use a conversational style rather than a formal tone.

  • Example: Address the learner directly (e.g., “You will learn…”).

• Voice:

  • Use a human voice for narration rather than a machine voice.

  • Example: Record narration with a natural, expressive voice.

• Image:

  • Avoid showing the speaker’s image unless it is relevant to the lesson.

  • Example: Use a voiceover without a talking head unless the speaker’s gestures or expressions add value.

Experimental Comparisons

• Design:

  • Mayer uses a post-test-only research design, where learners are randomly assigned to control or experimental groups.

  • The control group receives traditional instruction; the experimental group receives instruction featuring the to-be-tested multimedia method.

  • Outcome Measures: Use retention and transfer tests to assess learning outcomes.

• Effect Size:

  • Measures the strength of the effect of the instructional method.

  • Calculated by subtracting the control group’s mean score from the experimental group’s mean score and dividing by the pooled standard deviation.

  • Interpretation:

    • Large effect size (>0.8): Indicates practical significance.

    • Medium effect size (0.5): Moderate effectiveness.

    • Small effect size (0.2): Limited effectiveness.

Examples of Multimedia Learning

• Book-Based: Printed text with illustrations explaining how lightning storms develop.

• Computer-Based: Narration with animation explaining how car brakes work.

• Interactive Games: Simulations like Design-a-Plant, where learners design plants for specific environments and are tested with retention and transfer questions.

Conclusions

• The chapter emphasizes the importance of evidence-based principles for designing effective multimedia instruction.

• Mayer’s research demonstrates that well-designed multimedia materials can significantly enhance learning by leveraging both words and visuals.

• Experimental comparisons are a key methodology for identifying effective instructional methods, with transfer tests and effect sizes providing robust measures of learning outcomes.

• The 12 principles of multimedia design (e.g., coherence, signaling, contiguity) offer practical guidelines for creating instructional materials that promote active processing and deeper understanding.

Mayer, R. E. (2020). Multimedia learning (3rd ed.). Cambridge University Press. https://doi.org/10.1017/9781316941355

Resources

• LTX-Talk LaTeX Class: https://github.com/josephwright/ltx-talk
• PDF/UA Standard: https://www.pdfa.org/resource/pdfua/
• Beamer Documentation: https://ctan.org/pkg/beamer
• PAC Accessibility Checker: https://www.access-for-all.ch/en/pdf-lab/pdf-accessibility-checker-pac.html