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Archive for the ‘Competence in Psychometric Testing’ Category
Friday, January 15th, 2010
Types of Bias in Psychometric Test Translation
With the demand and need for psychological tests increasing in various different cultures and countries, there has been much greater awareness regarding some of the issues that are associated with the development or adaptation of tests to be used in contexts and situations that may be different from which the test was developed for. This article focuses on one of the key aspects of translating tests, the types of bias that can occur.
When utilizing the test in a new cultural group, it is not quite as simple as directly translating the test, administering it and then comparing the results for its validity. There are a number of issues that need to be considered such as whether the area assessed with the test applies to the new culture or whether is may be biased towards that group and whether what is assessed by the test also has similar behavioral indicators? These are just some of the potential areas where bias can be found in the translation of tests and affect the validity of the test being utilized in the new context.
Van der Vijer & Hambleton (1996) differentiates between three distinct types of bias that may affect the validity of tests that have been adapted for different cultural contexts and these are construct bias, method bias and item bias.
Construct bias occurs when the construct (e.g. personality) that is measured by the test displays significant differences between the original culture for which it was developed and the new culture where it is going to be utilized. These differences can occur in the way that the construct was formulated and developed as well as in the relevant behaviors that are associated with the construct. It is critical to examine whether the underlying theory of the test is subject to construct bias and this can be examined through the studies examining the construct and its associated behaviors in the context that it will be utilized in. If there are significant differences found in these studies, it may indicative that there is construct bias. Major revisions may be required to overcome this bias. If not, the validity of the test will be affected.
Method bias refers to factors or issues related to the administration of the test that may affect the validity of the test. Examples of areas that method bias can occur include social desirability, acquiescence response styles, the conditions in which the test was conducted and the motivation of the respondents. Across cultures, there potentially can be differences that can occur in these areas and these can affect the way that the respondents answer the items in the test. This potentially may lead to differences between found that can be erroneously attributed to cultural differences when in fact, these differences are the result of differences in the administration procedures. As a result, it is threat to the validity of tests that have been adapted for use in new cultures. Test developers also not only need to focus on the adaptation of the test itself but also need to be aware of issues regarding the implementation of the test in a new context.
Item bias is another source of bias that can occur in the translation of tests and these refer to biases that occur with the items in the test. This is usually the result of either poor translation choices for items or due to culturally inappropriate translations. For example, the phrase “kick the bucket” is essentially a phrase that referring to passing away in the Western context and is commonly known by most people in that culture; unfortunately, this phrase would have no meaning for people from cultures without any prior experience with that phrase. In this manner, a literal translation of that phrase would be a poor translation as it does not convey the correct meaning of the item. The items in the test need to be culturally equivalent, where the meaning of the items needs to be correctly translated so as to maintain the validity of the test in the new cultural context.
These are some of the biases that may occur during the translation of tests. Test developers will need to be aware of the sources of bias and take the appropriate measures to avoid these biases.
References:
Van der Vijer, F. and Hambleton, R. K. (1996). Translating tests: some practical guidelines. European Psychologist, 1, 89-99.
Psychometric Training in Singapore, Hong Kong, Malaysia, and China
If you are serious about using psychometric tests properly then we recommend joining PsyAsia International’s Psychometric Assessment at Work Course which leads to a certificate of competence in Occupational Testing Level A and Level B from the British Psychological Society. The Course is run publically in Singapore and Hong Kong or in-house anywhere.
More details about BPS Level A and B in Singapore and Hong Kong
Online Psychometric Training – Worldwide
Alternatively, you might be interested in introductory Online Psychometric Test Training presented live by a registered psychologist. PsyAsia is offering a special fee of just US$12 for anybody who registers for the February online psychometric training course!
More details about online psychometric test training
Tags: bps certificates of competence singapore, bps level a hong kong, bps level a singapore, bps level b hong kong, bps level b singapore, choosing psychometric tests, level a occupational testing singapore, level b occupational testing singapore, personality assessment, Personality Tests, Reliability of Psychometric Tests, using psychometric test results
Posted in BPS Level A & B Certificates, Competence in Psychometric Testing, Error in Psychometric Tests, Personality Tests, Psychometric Test Training, Psychometric Tests, Reliability of Psychometric Tests, Validity of Psychometric Tests | No Comments »
Friday, November 20th, 2009
The Market for Psychometrics in Singapore
There are so many Psychometric Tests on the market in Singapore now, the task of choosing the right one is not easy. Choice is always a good thing, however as humans we often look for easy or stereotypical ways of making those choices and they are not always the best ones to make. For example, a client of ours was preparing for an upcoming team-building session. He approached us asking if we had a certain test that he could use in that session. Our answer was that we don’t supply that test for various very good reasons. The client’s response was “but so many people use it”. This is a typical response. Another potential client had been looking around in Singapore for Psychometric Personality Tests to use in his training sessions as an added benefit. He categorically advised us that he was not interested in validity and was looking for something simple and cheap! The reality here is that at best he is wasting his time and the time of those who will complete his tests. At worst and most likely, his trainees will be led to believe things about themselves which frankly may not be true (reliable or valid!).
Science, Psychology, Psychometrics and the Real World of Business
As busy professionals we often assume that if lots of other people are using a test it must be a good one. This is a huge mistake. Our evolution has programmed us to be seduced by glossy advertising materials and confident, friendly salespeople. On the other hand, we have a tendency to be turned off by less glossy scientific figures, statistics and perhaps psychologists such as myself who speak about the science and real value behind a test, its validity! Ultimately then, both our clients and ourselves as psychologists have problems to overcome!!
Psychologists have to be able to explain in more “glossy” terms about the technical properties of a test and our clients, usually the HR and aligned professions, are invited to turn their ears our way for a little while, just long enough to get the notion that there is more to a psychometric test than meets the eye!
Technical Properties of Psychometric Tests
When we talk of the technical properties of a psychometric test, we are referring to things such as its reliability and validity as well as how it was constructed. If a test is constructed well, it will take time. Not months, often years. The test will also evolve over time such that more and validity data will be added to its manuals. This process is costly, hence good tests cost money.
If you come across cheap tests, that should start to ring alarm bells. It’s possible to write a few questions on a napkin in a restaurant and call it psychometric and even try to sell it. If it looks good and the questions look relevant perhaps it will sell and gain a huge following. But how reliable is that test?
In other words, can it provide consistent measurement of your candidate? If your bathroom scales provide different results each time you weight yourself you take them back and say these are not reliable. Likewise with a test, you need to ensure that it is consistently assessing the constructs that it purports to assess. We often come across new clients who are shocked when we tell them that good personality tests often contain around 200 questions. However, buyer beware! We know that the longer the test, the more reliable the results (as long as it is not so long that the candidate falls asleep!).
An unreliable test can not be a valid test, hence reliability is a precursor to validity. However, validity is arguably the most important aspect of a test. You choose to use tests because you want them to illustrate where a candidate stands in terms of their ability or personality or in order to predict how your candidate will perform or behave in a job. The test’s ability to meet this need is referred to as validity.
Some tests on the market are simply more valid that others. In fact, one test in the past year has proven to be more valid than all other tests it was compared with on the market! How come users stay with their current test then? Perhaps because of preference, habit, price, mass-following and so on. However, do ask yourself and your test supplier, how valid is your test – this is the single most important technical property in a psychometric test!
Sometimes tests which are more valid will be more expensive but this makes sense. If a test took a long time to develop, was developed well and by a reputable publisher and is based on well founded theories that have been researched internationally, then surely it is worth paying the extra as such a test will provide an excellent return on investment with its strong validity.
Training to use Psychometric Tests in Singapore
Properly developed psychometric tests require proper training to be used competently. If your test supplier requires that you undergo very limited or no training, this is a reflection of the test as well as their lack of understanding of psychometrics. You need to understand the concepts referred to above, as well as error in testing and how to make decisions based on test results, let alone how to feed back results properly to candidates and decision-makers. The type of questions (i.e., forced choice versus rating scales) will also dictate how you can use the results – you need to be trained to understand this! In some parts of the world (South Africa for example), only psychologists can use psychometric tests. Whilst this is a strict rule, it has its logical basis in how easy it is for untrained professionals to use tests wrongly.
Purchasing Psychometric Tests in Singapore
You may also wish to consider where you purchase your tests from, particularly in Singapore. In recent years we have seen an influx of profiteers in the industry who seek to make money but lack any depth of understanding in psychometrics or psychology at work. This will change in time as psychology in Singapore develops. For now however, be wary of this and we suggest that you only purchase psychometric tests from fully registered organisational psychologists who have a firm grounding in personality, psychometrics and psychology at work and who are answerable to professional competence and ethics boards. Many of those selling psychometric tests in Singapore are simply not answerable to anybody in terms of their conduct or competence. You can therefore not be certain that any advice they provide is relevant, up-to-date or will work in your organisation.
There are many more things to be aware of when choosing psychometric tests in Singapore. We cannot entertain them all here due to space constraints. You may wish to look out for training courses in Psychometric Assessment such as our our Psychometric Assessment at Work training which leads to the internationally recognised British Psychological Society Level A and B Certificates of Competence in Occupational Testing. Such courses will prepare you further for choosing the right test and therein avoid costly selection and development mistakes. Look for courses run by experts in psychometrics who are based in Singapore and hence have a strong understanding of test use aligned with local culture, laws and practice.
Note: some Singapore firms will ship in overseas trainers to run psychometric training. We suggest you avoid this training reseller model given that the facilitator is based overseas and is thus likely to lack knowledge of the Singapore business/legal and cultural environment for Psychometric Testing.
This article is Copyright PsyAsia International Pte Ltd.
It was originally written for Human Resources Magazine in Singapore
A shorter version of the article appears in the magazine’s November 2009 issue
Tags: aptitude test distributor, bps level a singapore, bps level b singapore, choosing psychometric tests, level a occupational testing singapore, level b occupational testing singapore, personality test distributor, personality test training singapore, psychometric assessment singapore, psychometric test singapore, psychometric test training singapore, singapore psychometric tests
Posted in BPS Level A & B Certificates, Competence in Psychometric Testing, Psychometric Test Training, Psychometric Tests, Reliability of Psychometric Tests, Validity of Psychometric Tests | Comments Off
Friday, November 20th, 2009
Welcome to our first session in Psychometric Testing!
In this first session we will explore the following:
1. What is a psychometric test?
2. A brief background of psychometric testing.
What is a psychometric test? How are they developed?
Let’s start out by telling you what a psychometric test is not!
You may have come across various different online tests. Not all of them are psychometric. Whether they are or not will depend on how they were designed, for what purpose and what they intend to measure. For example, you may have come across the Thematic Apperception Test or the Rorshach Inkblot Test. These tests are used mainly in clinical settings. The client is asked to look at scenes or pictures and to articulate what they see. Such tests are supposed to be able to assess the unconscious mind. However, interpretation is not as objective as we would like to see in occupational testing and assessment. Furthermore, what the client “sees” may be based on external factors such as culture, upbringing or season of the year.
Psychometric Tests are different! They are defined as quantitative (numerical) assessments of one or more psychological (in the head) attributes. So, psychometric tests are used to assess in a quantitative way things like numerical reasoning skills, verbal aptitude, extroversion, conscientiousness and so on. That alone does not make a test psychometric of course. In order to be psychometric the test must have been designed to be:
1. Administered in a standardised manner
2. Scored in a standardised manner
3. Interpreted in a standardised manner
4. Constructed according to psychometric principles
You’ll see later how important standardisation is throughout the use of psychometric tools. In fact standardisation is a critical element of all scientific HR processes.
As for being constructed according the psychometric principles, what we mean here is that the test must have gone through each aspect of a very scientific development process. It is not good enough to simply write down a few questions, produce a flashy report and start selling a new test! This is the process it must go through:
a. Development of a rationale behind the test that is supported by research. For example – if I decide to develop a new test of extroversion, the scientific research literature and models must inform the design of my questions and the aspects of extroversion that I attempt to assess.
b. Next I need to write some experimental questions. At this stage I’ll write more questions than I intend to have in the final version of my test because I am prepared to throw some out based on feedback.
c. Now I’ll find a sample of people (who represent the group I am designing the test for) and I’ll ask this sample to complete my experimental test. In other words, I pilot my test.
d. Next I head back to my office and assess the responses and how they relate to each other statistically. At this stage I am running item analysis to test that similar questions (items) are indeed related to each other in the way I would expect. More on this later. The point to grasp now is that this is an iterative process. Things won’t be perfect the first time around. Based on the statistics I’ll need to remove some questions, refine others and then go back to point C. I’ll do this again and again until I am happy with the statistics I get at point D!
e. Now that my test questions are performing well I need to enter a standardisation phase. Here, a larger group of people will complete my test and that will show me where people tend to score on the test. This group will become my benchmark or norm group later and add meaning to the scores of future test-takers.
f. The next question is “Does my new test actually assess what it is supposed to assess and/or does it predict something meaningful?”. As an example, you would expect my numerical reasoning test predict success of accountant trainees. This stage is called Validation, we are assessing the validity of the test or whether it is fit for purpose.
g. Now, we all know from science classes at school that all good experiments end with a write-up! That’s exactly what we do at the final stage of psychometric test development. We need to write up all of the above stages in a long document which is called the test’s technical manual. It is this manual that prospective clients with reputable training in psychometrics will consult before purchasing a psychometric test. So, if your test publisher tells you they don’t have such a document, it might be wise to stay away from them. On the other hand – do expect to pay for the manual. Some publishers will offer them free of charge but others will require a fee.
Based on the above, hopefully you can see that developing tests well takes time and effort. It is for this reason that good tests are usually not cheap! Not only that. The test is not static. People change, norms change and so validities may even change. The publisher cannot put the test on the shelf and forget as if it were a book they wrote years ago. This is why usually clients will pay a fee per test report or per candidate whenever they use the test. If you are attracted by free or very cheap internet-based tests you could be making a costly mistake. Particularly if you plan using the test in candidate selection for your business.
What is the history of psychometric testing?
Let’s give you a very brief background at this stage. Something that I find interesting being based in Asia and often working with Western-developed tests is the role Asia has in the development of psychometric tests for assessment at work! If it had not been for the Chinese Cultural Revolution, China may actually be far more advanced in this field than the West because China certainly was testing for individual differences before such testing was recorded in Europe or the USA. The Chinese government believed it important to test for entrants to the Civil Service more than 4000 years ago! However, at the time of the Cultural Revolution, this sort of assessment was outlawed as being too bourgeoisie.
This paved the way for the West to develop individual difference assessment and one of the first names to crop up in textbooks is French Psychologist Binet who around 1905 coined the term IQ. His application of testing was of course more related to education. The World Wars saw an increase in and marked use of psychological assessment for selection decisions. Here people were forcibly recruited into the army through conscription. The arduous task for decision-makers was where best to place these newcomers. The Army Alpha and Army Beta tests assisted in answering this question. Although successful for war-time placements, the same tests used in peacetime by commercial organisations gained a poor reputation as they worked less well (they were not designed for this application).
Nowadays tests are used extensively in organisations to assist in selection and development decisions as well as team-building, career guidance and performance appraisal. Reputable test publishers go out of their way to assess their tests and ensure they are free from bias and that they work to do the job they were designed to do. Tests are useful decision-making tools although they should never be used on their own. You’ll find out why later. One of the biggest problems we face in Asia is an influx of poorly designed tests along with non-psychologist distributors who know little about psychology and psychometrics. In this course you’ll learn more about this, how to spot good from bad and above all you’ll gain the confidence to make competent decisions about using the best psychometric test for your purpose.
THIS ARTICLE IS CLEARED FOR PUBLISHING ON PSYCHOLOGY1 GROUP SITES ONLY. IT REMAINS COPYRIGHT AND INTELLECTUAL PROPERTY OF PSYASIA INTERNATIONAL PTE. LTD. YOU ARE NOT AUTHORIZED TO PUBLISH IT ON ANY OTHER SITE. YOU ARE NOT PERMITTED TO COPY/PASTE THIS ARTICLE OR TO SAVE IT TO YOUR LOCAL DRIVE. YOU ARE ONLY PERMITTED TO READ IT ONLINE AT OUR WEBSITE. VIOLATION OF THESE TERMS WILL RESULT IN BANNING OF OFFENDING IPS AND LEGAL ACTION FOR THOSE WHO REPUBLISH THIS ARTICLE WHETHER IT BE WITH OR WITHOUT A REFERENCE TO THE ORIGINAL AUTHOR.
Tags: online psychometric course, online psychometric test training, psychometric test singapore, psychometric testing hong kong, psychometric training
Posted in BPS Level A & B Certificates, Competence in Psychometric Testing, Online Psychometric Training Mini-Course, Psychometric Tests, Psychometric Tests in HRM | Comments Off
Wednesday, October 28th, 2009
For psychometric assessments to have utility and be effective when assessing people for various purposes, the assessment has to be reliable and valid for the situation.
All personality tests are not 100% accurate and measurement errors from a variety of sources can affect the results. The length (i.e. the number of items) of the assessment affects the reliabilty of the assessment and research has demonstrated that measurement errors are smaller in longer assessments than in shorter assessments. In addition, a larger number of items better represents the abstract characteristics that are being assessed. For example, when assessing personality, one cannot expect to obtain an accurate picture of an individual through a few questions, therefore more items are needed. It has to be noted that after a limit, increasing the number of items will not provide further increases to reliability as other factors such as fatigue will set in.
It is for this reason that good personality assessments will have a large number of items and therefore require some time for the candidates to complete the assessment (usually between 200-250 questions, taking around 30-40 minutes). Psychometric assessments that are shorter will tend to be less reliable and valid. With a large number of items, the reliability of the test will be better and in turn the validity of the assessment will be better too. Validity is all about predicting performance. So with high validity human resource professionals get a higher return on their investment.
Tags: choosing psychometric tests, hong kong psychometric tests, Personality Tests, psychometric assessment blog, psychometric personality tests, psychometric research, psychometric tests and error, singapore psychometric tests, standard error measurement
Posted in Competence in Psychometric Testing, Personality Tests, Psychometric Tests, Reliability of Psychometric Tests, Validity of Psychometric Tests | Comments Off
Tuesday, July 21st, 2009
One of the first things clients will want to know when choosing who to work with when ordering psychometric tests is “why should I choose xyz company”?
As the field of psychometrics continues to grow, overseas publishers are working hard to make inroads into local markets. Clients should therefore be wary of the expertise (or lack of it) in organisations that are distributing tests.
We firmly believe (as do publishers of high level tests such as the Saville Consulting Wave), that those in the best place to distribute psychometric tests are those who have a background in personality psychology and/or organisational psychology. In fact this premise was shared by many reputable test publishers until relatively recently.
Greed and motivation to expand market share have taken over in many cases and some test publishers have delegated test distribution to non-psychologists or those with short-course qualifications in this area.
The downsides of this are tremendous. Not only does it threaten the very integrity of the test and the industry, but it brings into the fore concerns regarding malpractice and the like.
Registered Organisational Psychologists are registered with government bodies. They therefore report to these bodies on issues involving competence. In addition to their 6-10 years of training in psychology (i.e. as much as a medical doctor!), they are bound to undergo continuous professional development and must submit proof of this on an annual basis. This means they need to attend high-level conferences, read peer-reviewed professional and academic journals and more.
Non-psychologists of course are not subject to any of the aforementioned. In fact, many clients who have come over to us from such distributors have entertained us with stories of gross negligence and incompetence of these “salespeople” who lack expertise and passion for the subject matter. A couple of examples follow:
1. A client told us how when they contacted “******** Assessments” in Hong Kong and asked for more information on how the test has 95% predictive accuracy (as published on their website). They were told that this related to 2 things. Firstly that the test has a sophisticated lie detection system and so is very accurate. A psychologist will tell you this has nothing to do with predictive accuracy! Predictive accuracy (or validity) is about using the test scores to predict work performance or something similar.
This same client was then told:
“The second form of predictive accuracy is construct validation which relates to the job prediction score”.
Again, a psychologist would point out that this salesperson is getting confused. Construct validity and predictive validity are two different forms of validity. Most importantly though, no psychometric test is 95% predictive! Psychologists know that and if they claim any different they would be reported to their board and struck off!
Unfortunately, at no time was this client provided with hard-data or evidence that this test (which is based on a theory that has not been peer-reviewed and has not been independently tested in Asia or Australia) actually predicts meaningful workplace behaviours and performance.
2. Another client told us how they contacted a non-psychologist distributor of another test brand in Singapore. They asked for information about impact of dyslexia on aptitude test scores and also wanted to know about the comparison between certain tests within that brand and those of the competition. This distributor had no idea there and then, and said he would need to go away and find out. A psychologist would not need to do this. Unless the client is asking about an obscure test, Psychologists are trained to have the answers.
As we know, there are many things to consider when choosing the right psychometric test. Issues such as reliability, validity, norm groups, standard error of measurement, cost versus validity (ROI), report options, online assessment options and so on. This short article has added to that list and suggested that the background and currency of the people in the distributorship are also important.
To cast doubt aside, it is best to work with distributors who have demonstrated their passion in psychology and psychometrics through years of training in the subject along with years of experience. Choose those holding full registration as psychologists with government/professional bodies who must undergo professional development on a continual basis. Purchasing psychometric tests from non-psychologists may amount to asking a private pilot to fly a jumbo jet. They may be able to get it off the ground (“may”!), but what happens when they encounter problems or when they try to land??!!!
Tags: aptitude test distributor, choosing psychometric tests, hong kong psychometric tests, personality test distributor, psychometric assessment singapore, psychometric test distributor, psychometric test singapore, singapore psychometric tests
Posted in Competence in Psychometric Testing, Psychometric Tests | Comments Off
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