Building a Working Vocabulary

Everything else in this section is a technique for the exam room. This one is about the weeks before it, and it is the only Word Knowledge topic where the work happens in advance.

Why cramming fails here specifically

Most of the ASVAB rewards last-minute study. Ohm's law can be learned on a Tuesday and used on a Wednesday. The four-stroke cycle is four facts in order.

Vocabulary does not behave that way. A word is available under time pressure only after you have met it several times, spread out, with gaps in between. Reviewing fifty words once each does almost nothing; reviewing fifteen words four times over three weeks does a great deal.

So the most important decision is when you start, not how hard you work. Three weeks at twenty minutes a day is seven hours in total, the same as one desperate Saturday, and it produces a completely different result.

The method

Fifteen new words a day, reviewed on a schedule.

1. Collect. Keep a running list of words you meet and cannot define - anywhere, not only in study material. The recruiter's paperwork, a news article, a manual.
2. Record three things for each: the word, a short definition in your own words, and a sentence you wrote yourself. The sentence is the part that works. Copying a dictionary example does much less.
3. Review on widening gaps. See a new word the next day, then three days later, then a week later. Anything you get right twice in a row comes out of the pile.
4. Keep the pile small. Fifteen active words, not two hundred. Words leave the pile when they are known and are replaced.

That is spaced repetition, and it is what flashcard applications automate. Paper index cards work identically if you sort them into "knew it" and "did not" and revisit the second stack more often.

Learn families, not words

A word learned alone is one word. A word learned in a family brings its relatives.

By root. Learn spec and you have inspect, spectator, circumspect, retrospect, perspective, conspicuous. Six words for the price of one root, and the root also attacks words you have never seen.

By opposite. Learn frugal beside extravagant. Opposites are the standard distractor on this subtest, and a word learned next to its opposite is much harder to reverse under time pressure.

By shade. Learn annoyed, angry and furious together as a scale. That is what the harder questions test, and the scale is invisible if you learn the words separately.

By topic. Words about speech, words about size, words about approval. Related meanings reinforce each other.

Reading is the input, not the method

Every study guide says to read more. That is correct and it is incomplete, because reading alone does not convert an unfamiliar word into a recallable one.

Reading supplies candidates. The list and the review turn them into vocabulary.

So: read nonfiction written for adults, daily, and write down the words you cannot define. Fifteen minutes of reading that produces three new cards is worth more than an hour that produces none.

What to read matters less than reading regularly. News reporting, long magazine features, service manuals, history. Fiction works too, though nonfiction is closer to the register the test uses.

What to do with the time you have

The one-week row is the important one. With little time, a word list is a bad investment because you will not meet each word often enough for it to stick. Word parts are different: forty roots cover hundreds of words and they are rules rather than items, so they survive a short study period far better.

What you can skip

Our bank holds 1,203 Word Knowledge questions testing 1,122 different words. 1,057 of those words are tested only once, and none more than three times. Every question but a handful asks what a word "most nearly means"; about a quarter set the word in a sentence first. No question asks for an antonym, a spelling or a pronunciation.

Memorizing a list of "1,000 ASVAB words". The numbers above are the case against it: with most words tested once, no list can cover the test, and the return per hour is poor compared with roots.

Learning obscure words. The subtest uses words an educated adult would meet, not specialist vocabulary.

Studying spelling. Word Knowledge does not test it.

Reading a dictionary. No retrieval, no spacing, no retention.

Where people lose points

Starting too late, which is the real error and the one everything else follows from.

A pile that grows without limit, so nothing is reviewed often enough.

Recognizing rather than recalling. If you look at a word and then at its definition, you have tested nothing. Cover the definition first.

Collecting without reviewing. A list of two hundred words never revisited is a record of reading, not vocabulary.

Skipping the self-written sentence, which is the step that does the most work per second spent.

A three-week plan

Week one. Fifteen words a day from your reading. Learn the negation and direction prefixes. Review the previous day's words each morning.

Week two. Fifteen words a day. Learn the root tables in families of six. Review week one's words twice across the week.

Week three. Stop adding new words after day four. Review everything, with the most attention on what you have got wrong twice. Re-read the opposite pairs, since they are the distractor you will meet most often.

Seven hours in total, and it will hold on test day in a way that seven hours in one sitting will not.

Where this leads

Everything else in this section assumes a vocabulary to work with. The techniques raise your score on the words you half-know; this is how the half-known pile grows.