The IRT model underlying ASVAB scoring is the three-parameter logistic (3PL) model. The 3PL model represents the probability that an examinee at a given level of ability will respond correctly to an individual item with given characteristics. Specifically, the item characteristics represented in the 3PL model are difficulty, discrimination (i.e., how well the item discriminates among examinees of differing levels of ability), and guessing (i.e., the likelihood that a very low ability examinee would respond correctly simply by guessing).
In the Navy, the rank of Admiral of the Navy theoretically corresponds to that of General of the Armies, though it was never held by active-duty officers at the same time as persons who held the rank of Fleet Admiral. George Dewey is the only person to have ever held this rank. After the establishment of the rank of Fleet Admiral in 1944, the Department of the Navy specified that the rank of Fleet Admiral was to be junior to the rank of Admiral of the Navy. However, since Dewey died in 1917 before the establishment of the rank of Fleet Admiral, the six-star rank has not been totally confirmed.
The MET (Mobile Examination Test) Site ASVAB is only for those who have been referred by a recruiter to take the exam because it is only for enlistment into one of the branches of the military. This exam is broken up into 8 parts and is very similar to the CAT-ASVAB. The primary difference here is that the MET Site ASVAB is conducted with a pencil and paper rather than on the computer. This means that the answers to the MET ASVAB can be changed, but the test is still timed, so it is a good idea to keep track of the time while testing. Also, test takers for the MET ASVAB are not penalized for wrong answers, so always guess and respond to all of the questions in order to maximize your chances for scoring well on the exam.
These scores include your Armed Forces Qualification Test (AFQT) score as well as your scores on each of the 9 individual subtests that make up the ASVAB.  When you get your report, the most important score you will want to look for first is your AFQT score.  This score determines your eligibility to serve in the military and to enlist in the U.S. Marines you need to have achieved a score of at least 32.

The questions that have a tendency to arise rather quickly are something along the lines of “why is this test so important?” and “What is the overall purpose of this test?” Well, first it is important to define the actual test and to assess the colorful history of the test. The Armed Services Vocational Aptitude Battery test (ASVAB) is a test that was officially formatted in 1968 with the intention of mentally preparing soldiers with knowledge that identifies with the following:

After adding so much information to the aptitude test, there was a bit of difficulty interpreting the test results. In addition to that, a vast majority of test takers were deemed as being under qualified based on their test results. This is why the percentile change was made. It ensured that a 50% actually correlated with a person doing better than 50% of the test takers. Those revisions have worked hand-in-hand with the preparation of the armed forces.
The Assembling Objects section of the ASVAB practice test measures your ability to determine how an object will look when its parts are put together. You will be shown an illustration of pieces and asked to choose which one, among a selection of finished diagrams, shows how they fit together. The CAT-ASVAB has 16 questions in 16 minutes, while the paper-and-pencil version has 25 questions in 15 minutes.
I thought I was just buying an extra book, that I would most likely not put attention to. But, it was not. This book is filled with practice questions, which I got to study before hand thanks to the "2015 / 2016 ASVAB For Dummies". These two books makes a great combination. One to study and the other to test how far you have improved by testing yourself. I am glad I bought it. I recommend it to everyone who is thinking of taking the ASVAB or the AFQT. Just have in mind, that this book is all about questions, of course it will give you the correct answer in the back of it, but it will not go into detail as much as the "2015 / 2016 ASVAB For Dummies" book.

There are many misconceptions about what it’s like to serve in the U.S. military. If you don’t know any soldiers personally, you might think of the military as a place for infantry, trudging though rough terrain and loading giant artillery. Although that may have been true in the past, today’s military offers many opportunities that aren’t readily apparent to the typical high school graduate. For example, there are jobs in aviation mechanics, medicine, and accounting. There are also peacekeeping and humanitarian efforts by the United States military that require skills in verbal and written communication. Taking the exam can help you determine if you would be well-suited to one of these occupations.
I would easily recommend this book to some people who are looking to solely study from the book, but also have no intentions of using the online practice questions. considering this book is from 2013 i discovered after it was delivered to my home. That being said there is no place for this book on the Dummies web site, and you cannot access the practice questions which you have paid for. Waste of money.

A lot of people see the “CAT” term attached to the ASVAB test when they first start looking into the test and aren’t sure what that stands for. This term is an acronym and it stands for “Computerized Adaptive Test”. There are three different versions of the ASVAB test. The CAT is available at military processing stations for enlisting soldiers. The pencil and paper (also known as the P&P or S-ASVAB) version of the test is available for high school and college students who may not actually enlist. The third type of ASVAB test is the MET-ASVAB, or Mobile Examination Test, which is available only for enlisted soldiers at mobile testing centers (this test is also done with paper and pencil).

How good is your vocabulary? It’s never too late to brush up by using “vocabulary builders” you find on Google, reading a variety of books, manuals and magazines, and using practice tests to identify words that you’re not sure of. The WK section tests your word knowledge in several ways. First, it tests whether you can recognize correct and incorrect spellings of words. For this type of question, you may want to review words that are often spelled incorrectly, and make sure you know how to spell them. You will also need to know the definitions of words, and be able to use them in a sentence. The more you practice, the better you will be at automatically recognizing the right spelling of a word, and the easier it will be to know it’s precise meaning when it’s used in a sentence.
Just as the President, the Secretary of Defense, and the Secretary of Homeland Security, are in charge of the entire military establishment, maintaining civilian control of the military, so too are each of the Defense Department's constitutive military departments headed by civilians. The four DoD branches are organized into three departments, each with civilian heads. The Department of the Army is headed by the Secretary of the Army, the Department of the Navy is headed by the Secretary of the Navy and the Department of the Air Force is headed by the Secretary of the Air Force. The Marine Corps is organized under the Department of the Navy, however it is still considered a separate and equal service. The Coast Guard is under the Department of Homeland Security and receives its operational orders from the Secretary of Homeland Security. However, the Coast Guard may be transferred to the Department of the Navy by the President or Congress during a time of war, thereby placing it within the DoD.[19]
Prospective service members are often recruited from high school or college, the target age ranges being 18–35 in the Army, 18–28 in the Marine Corps, 18–34 in the Navy, 18–39 in the Air Force and 18–27 (up to age 32 if qualified for attending guaranteed "A" school) in the Coast Guard. With the permission of a parent or guardian, applicants can enlist at age 17 and participate in the Delayed Entry Program (DEP), in which the applicant is given the opportunity to participate in locally sponsored military activities, which can range from sports to competitions led by recruiters or other military liaisons (each recruiting station's DEP varies).
A military brat is a colloquial term for a child with at least one parent who served as an active duty member (vice reserve) in the armed forces. Children of armed forces members may move around to different military bases or international postings, which gives them a childhood differing from the norm. Unlike common usage of the term brat, when it is used in this context, it is not necessarily a derogatory term.

What is the military? In simple terms, the U.S. Armed Forces are made up of the five armed service branches: Air Force, Army, Coast Guard, Marine Corps, and Navy. There are three general categories of military people: active duty (full-time soldiers and sailors), reserve & guard forces (usually work a civilian job, but can be called to full-time military duty), and veterans and retirees (past members of the military). And of course there are the millions of family members and friends of military members, past and present. But you're here to learn more about the military. There is much to learn! So first the basics. Exactly who is in charge?
The ASVAB is one of the most widely used aptitude tests in the world. The intent of the ASVAB test battery is to assess a candidate's potential for future success in the U.S. Military. Because of the nature of the test, the ASVAB can also be used to give a candidate valuable information about both military and civilian career choices that they may be suited for.

During the war, significant advances were made in military communications through increased use of radio, military intelligence through use of the radar, and in military medicine through use of penicillin, while in the air, the guided missile, jet aircraft, and helicopters were seen for the first time. Perhaps the most infamous of all military technologies was the creation of the atomic bomb, although the exact effects of its radiation were unknown until the early 1950s. Far greater use of military vehicles had finally eliminated the cavalry from the military force structure.
The ASVAB is a series of timed aptitude tests that are used to classify selected candidates into appropriate job roles as well as ultimately decide the eligibility of candidates for US military service.  In other words, perform poorly on this test and you could severely limit your opportunities in the military or even prevent yourself from serving.
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After the final ability estimate is computed, it is converted to a standard score on the ASVAB score scale that has been statistically linked to the ability estimate through a process called equating. Equating studies are conducted for every paper and pencil ASVAB form to ensure that scores have the same meaning regardless of which test form the examinee receives.
The ASVAB is a series of tests developed by the Department of Defense and is used by the U.S. Army to determine whether you have the mental aptitude to enlist. The ASVAB also helps determine which Military Occupational Specialties (MOS) you qualify for. The ASVAB is required to enlist in the U.S. Army and is valid for two years. The ASVAB may be given in a computerized version at a Military Entrance Processing Station (MEPS) or in a paper version at various Military Entrance Test (MET) sites around the country or at high schools and colleges.