Readability

What is the Automated Readability Index?

By Ben Long

October 15, 2024
automated readability index

The Automated Readability Index (ARI) is a readability test that gauges the level of education needed to understand a piece of writing. This test serves as a helpful guide, ensuring that writers connect with their audience and share ideas clearly.

TL;DR:

  • The Automated Readability Index (ARI) is a readability-checking formula. It calculates the average education level needed to understand a piece of writing.
  • The Automated Readability Index is faster than other readability scores, providing instant feedback.
  • The military originally used ARI to create accessible training materials with electronic typewriters.

Why Use the Automated Readability Index?

Readability plays a crucial role in effective communication. It’s like navigating a maze; if the path is unclear, readers will get lost. In essence, readability gauges how much education someone needs to grasp your writing. For example, a score of 8 means an 8th grader can understand it without difficulty.

Many readability algorithms exist. They include the Flesch–Kincaid grade level, Gunning fog index, SMOG index, Fry formula, and Coleman–Liau index. But most are as dull as watching paint dry. You click, wait, and then maybe, finally, you see your score. It may give you an overview, but it complicates the editing process.

Enter the Automated Readability Index, a speedy cheetah in a world of snails. This tool shines when you need real-time results while editing. You tweak your text and instantly see the impact. For decades, this formula has been a staple, dating back to the era of electronic typewriters.

Why was the Automated Readability Index created?

The Automated Readability Index (ARI) has fascinating military roots. In the late '60s, the military faced a pressing question: How could they make complex documents clear for recruits from all walks of life? Soldiers came from across the country, bringing different educational backgrounds. Long, complicated documents just didn't cut it for everyone.

To tackle this, they dove deep into readability research. They created tools to measure the education level needed to grasp various texts. This effort led to training materials that anyone could understand, regardless of their schooling.

Launched in 1967, the ARI test quickly gained popularity. It boasts speedy calculations, making it more efficient than other readability frameworks. Yet, it still delivers similar accuracy. This efficiency opened doors for its use in electronic typewriters, which struggled with less streamlined formulas.

How is the Automated Readability Index different from other readability checkers?

Readability measures abound, like the Flesch-Kincaid grade level and Gunning fog index. They all share a common goal: assessing writing clarity. They do this by analyzing the total words in a sentence and the syllables they contain. With a sprinkle of complex math, they can estimate the writing’s grade level.

But, there's a hitch with these tools. They require users to count out syllables, a task that confounds both machines and humans. Take the word “family,” for example. In some regions, it sounds like "fam-uh-lee," a three-syllable word. In others, it’s simply pronounced "fam-lee," skipping the middle syllable. This discrepancy means that two people using the same formula can arrive at wildly different grade levels for the same piece of text.

Instead, the Automated Readability Index (ARI) takes a different path. It relies on total character count instead of syllables. Critics may argue it lacks precision, yet studies prove it aligns well with the results of other tools. Plus, ARI shines with its speed. Machines struggle with syllable counting and often fail at the task or take too long to accomplish it. In contrast, ARI is quick and resource-light, making it a modern breakthrough in readability assessment. This allows it to provide instant feedback and work well in smaller applications.

How can you use the Automated Readability Index?

One powerful way to harness an Automated Readability Index calculator is through Hemingway Editor's free online readability checker. This tool leverages ARI to unveil the true essence of your writing. First, it reveals an overall grade level score, showing the average education required to grasp your text. Think of it as your own personal editor providing insights about your writing.

But there's more! Hemingway also highlights your most confusing sentences. It uses yellow to highlight sentences that read at a 12th-grade level and red for those that soar above the 14th-grade mark. Work through the highlights and feel confident that your text will connect with readers.

The best part? Accessing this tool won't cost you a dime, and there are no pesky word count limits. Edit any piece of writing, no matter how lengthy, with complete freedom. If you seek even richer feedback, you can try Hemingway Editor Plus for free. It catches common mistakes like spelling errors, grammar mishaps, adverbs, passive voice, and unnecessarily complex word use with ease.

With its cutting-edge AI, Hemingway Editor Plus doesn’t just point out issues—it fixes them for you with a single click.

FAQ

What is the Automated Readability Index?

The Automated Readability Index (ARI) is a formula used to calculate the average level of education needed to understand a given text. It uses the number of characters, words, and sentences in a piece of writing to assign this grade level.

What is a good readability score?

The average adult in the United States reads at an 8th-grade level, making it a common readability target. For more accessible writing, a fourth-grade level is acceptable. A 12th-grade level is a great score for more technical documents, which may contain specialized terminology and jargon.

How can I check the grade level of my writing?

There are many measurements to check the readability of a piece of text. Popular tools include Flesch–Kincaid, Gunning Fog Index, SMOG Index, Fry Readability Formula, Coleman–Liau Index, and the Automated Readability Index.

Use Hemingway's free readability checking app to measure your writing's readability.

How can I lower the grade level of my writing?

The best ways to lower the grade level of a piece of writing are to simplify your vocabulary and sentence structures. Replace complex terms and jargon with common, everyday words. Then, break up complex sentences into a string of shorter sentences focused on one idea each.

When should you use a readability checker?

Readability checkers are essential tools for any type of writing. They ensure that your text is written in a way that your target audience can understand. This is especially crucial in fields like healthcare, legal documents, and government communications.

Try Hemingway Editor Plus

Hemingway Editor Plus fixes common writing issues like wordy sentences, passive voice, and more — with the click of a button.