Secondary Quality Criteria in Psychological Research
In psychological research and assessment, tests and procedures are only as good as the criteria that ensure their quality. In addition to the primary quality criteria – validity, reliability, and objectivity – secondary quality criteria play a crucial role in the practical applicability and acceptance of a test. Here, we take a look at the most important secondary quality criteria and show why they are essential for the development and application of psychological tests.
While primary quality criteria ensure the scientific quality of a test, secondary quality criteria ensure its practical applicability. Without norms, comparability, efficiency, tolerability, and acceptance, tests would often be difficult to use and would fail to reach their target groups.
Taking these criteria into account is therefore essential to make tests not only scientifically rigorous but also practically valuable. When developing psychological tests, the aim should always be to strike a balance between primary and secondary quality criteria.
Standardization
Norming ensures that test results can be placed in the right context. It defines reference values against which a test taker’s results can be compared, such as age, gender, or occupational groups.
The currency of the norms is crucial. Outdated norms can significantly reduce the meaningfulness of a test.
Example: Without norms, an intelligence test produces only raw scores that are difficult to interpret. Norming makes it clear how a person performs in comparison with others.
Comparability
A test is comparable when its results are consistent with, or can be meaningfully distinguished from, those of other tests or procedures in similar contexts. This requires standardized testing conditions and consistent evaluation criteria. Differences in test administration or target groups can impair comparability.
Example: Two tests designed to measure job satisfaction should produce similar results if they measure the same concept.
Economy
The economy of a test refers to the effort required to administer, evaluate, and interpret it. An economical test should conserve resources without compromising the quality of its results. Sometimes economy conflicts with other quality criteria, such as validity or fairness. A faster test is not always a better test.
Example: A questionnaire that can be completed in ten minutes is often preferred over a one-hour interview—provided that both yield comparable information.
Acceptability
Tolerability refers to the burden that a test places on the person taking it. This burden may be physical, psychological, or time-related. A test should be designed to affect the person taking it as little as possible. Tolerability can be improved through clear instructions and a pleasant testing environment.
Example: A comprehensive personality test that asks intimate questions may be perceived as inappropriate, whereas a shorter, anonymized test is more likely to be accepted.
Acceptance
The acceptance of a test describes how well it is received by test participants and other stakeholders. Acceptance is a subjective but decisive criterion that can influence willingness to participate and the quality of the results. Factors that promote acceptance include understandable instructions and transparent objectives, an appropriate length and level of difficulty, and fair, culturally independent test design.
Example: An adaptive intelligence test that dynamically adjusts the difficulty of the questions is often perceived as more motivating than a test that always presents questions of the same difficulty.
Q&A
Secondary quality criteria are additional quality characteristics that go beyond the classic quality criteria of objectivity, reliability, and validity. They include aspects such as fairness, efficiency, acceptability, and transparency. These criteria ensure that diagnostic procedures are not only scientifically sound but also practical to use. For example, a test may be valid and reliable but still impractical if it is too expensive or time-consuming. Secondary quality criteria are therefore essential for ensuring that diagnostic procedures can be applied efficiently and fairly.
Fairness means that diagnostic procedures do not systematically disadvantage people on the basis of gender, background, or other demographic factors. For example, a test that uses linguistically demanding items could disadvantage people whose first language is not German. To prevent this, tests should be designed so that they are equally accessible to all target groups. Fairness therefore contributes to equal opportunities and to the acceptance of diagnostic results.
The acceptability of a test refers to the burden it places on the person being tested. This includes the length of the test, the difficulty of the tasks, and the emotional burden. A test should be designed so that it does not overwhelm or demotivate the test participants. For example, a long intelligence test can be tiring, which negatively affects test performance. An acceptable test improves test motivation and thus increases the quality of the results.
Transparency means that test participants and those commissioning the test are informed about the purpose, administration, and evaluation of the test. This strengthens confidence in the test and its results. For example, test participants should know how their answers are evaluated and interpreted. Transparency promotes acceptance of the test results and minimizes misunderstandings.
The economy of a test refers to the relationship between the effort required and the benefits gained. An economical test is cost-effective, requires little time, and is easy to administer. For example, a questionnaire for assessing job satisfaction is more economical than an extensive interview. Economical tests are particularly important in practice because they conserve resources while still producing reliable results.
Conclusion
Secondary quality criteria such as standardization, comparability, economy, feasibility, and acceptability make a decisive contribution to the successful application of psychological tests. They ensure that tests are not only valid and reliable, but also practical and acceptable. By consistently taking these criteria into account, researchers and practitioners can develop psychological tests that meet the high standards required in research and practice.
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