Illustrations

Why use visual aids? Repetition: Repetition: –Explaining a message in different forms reinforces it. Accelerates communication: Accelerates communication: –A clear illustration can communicate an idea at a glance.

Use a visual aid: When words alone are impossible or inefficient for the task at hand. When words alone are impossible or inefficient for the task at hand. To summarize or emphasize a point. To summarize or emphasize a point. To present data described in the text. To present data described in the text.

When Words are Inefficient: Surgeon’s End Loop Knot - Text 1. Form a loop at the end of the line. 2. With the loop, tie an overhand knot. 3. Pass the loop through a second time. 4. Adjust the loop size. 5. Lubricate and pull the knot tight. 6. Trim the end.

When Words are Inefficient: Surgeon’s End Loop Knot - Illustrated

To Emphasize a Point: Text “Check your spelling and grammar before printing the Final Draft.” “Check your spelling and grammar before printing the Final Draft.”

To Emphasize a Point: Illustration –Check your spelling and grammar before printing the Final Draft.

To Present Data

Meaningful Graphics Pick the useful graphic. Pick the useful graphic.

Charts: Graphs Simple, visual representation of data Simple, visual representation of data

Charts: Bar graphs Simple Bar Graph Simple Bar Graph Complex Bar Graph Complex Bar Graph

Charts: Histogram A type of bar chart A type of bar chart Typically used to show distribution of a data set Typically used to show distribution of a data set

Charts: Pie charts Show relationships among items that total 100% Show relationships among items that total 100% Standard Pie Chart Standard Pie Chart Exploded Pie Chart Exploded Pie Chart

Pie Charts (cont.) What information is missing? What information is missing?

Charts: Scatterplot What is the relationship between the time between eruptions and their duration? What is the relationship between the time between eruptions and their duration?

Charts: Box plot Shows a summary of data: Shows a summary of data: –Smallest non-outlier observation –Lower quartile –Median –Mean –Upper Quartile –Largest non-outlier observation

Tables Useful for presenting data Useful for presenting data Less visual, better for reference Less visual, better for reference

Line Drawing

Labeled Line Drawing

Compare to: Photographs

Animations

Any questions? Any questions?