Is a Depression Questionnaire Reliable?

A depression questionnaire is the same thing as aor "c", or "true" or "false".
depression test or depression quiz. For anyA question that is commonly asked is whether the
psychological test to be reliable it needs to meet theresults from a depression test are used to diagnose
Standards for Education and Psychological Testing.depression. The answer? In part, yes, the depression
These standards are developed by three (3) differentquestionnaire is used as one reference point to
groups that include the American Psychologicaldetermine if a client is depressed or not. However, it is
Association (APA), American Educational Researchimportant to note that there are many other factors
Association (AERA) and the National Council onthat we look at to make a diagnosis. To diagnose
Measurement in Education (NCME). What does itdepression we need to do a full evaluation by looking
mean when a test meets the Standards? It meansat a variety of factors.
that they are "valid", "reliable" and "scored andSymptomotology is one of the components that are
administered" using standardized methods.considered. For instance, what symptoms does the
Validity basically means that the test measures what itclient have? How long have they been present? How
is supposed to measure. Also, it means that thesevere are the symptoms? Has the client experienced
concept for which the test was developed, and thethese symptoms before? How are they currently
measurements put in place, are well founded andfunctioning emotionally and cognitively? Have they
supported by evidence that justifies the interpretationrecently experienced any traumatic events? Also, is
of the scores.the client currently using drugs or alcohol? If so, how
Reliability means that the results of the test will beoften do they use?
consistent. For example, each time a test isThe mental health history of the client is considered as
administered to any one individual the results should bewell - have they been diagnosed with depression
almost the same. Assuming that the structure andbefore? What about the family history? Has any of
quality of the test is consistent, when the test is giventhe client's family members been diagnosed with
at two different points in time, it will yield similar results.depression?
While often confused, validity and reliability are not theIt is also important to rule out any other medical
same. Validity ensures that the test measures what itconditions that might cause or contribute to the
has been designed to measure. Conversely, reliabilitydepressed feelings. Is the client suffering with another
means that the results that are measured arecondition such as Lyme's disease, Rheumatoid Arthritis,
consistent. So, unfortunately, you can have consistencyChronic Fatigue Syndrome, a hypothyroid condition, and
in a test without validity - a test that providesany nutritional deficiencies? All of these things, and
consistent results but is not measuring what ismany others, need to be carefully considered before
designed to be measuring. This is why both validity andmaking a formal depression diagnosis.
reliability are so important.A depression questionnaire and depression tests are
The tests must also be scored and administeredavailable on-line. However, if want reliable results it is
employing a standard methodology. Research hasimportant to take one that is professionally developed
determined that, if a test is scored and administered in(ie. not by a Webmaster!). This will ensure that the
a standard way, the results are more effective anddepression test meets the Standards for Education
predictable than if they use a non-standard format.and Psychological Testing. What this ultimately means
A depression questionnaire or depression test isis that it will be valid - testing for signs of depression
basically a mood measuring device that gives anlike it is supposed to, and that the results you get will
indication of emotional and cognitive functioning.be reliable and statistically relevant.
Depression tests are developed and designed toIt would be horrible to take a depression questionnaire
evaluate an individual's mood, characteristics, affectthat generates incorrect results. It can tell you that
and demeanor. Most are also used to track behavioryou're depressed when you really aren't or tell you that
changes over a specific period of time. In most cases,you aren't depressed when you really are. In either
the tests are self administered and they ask you tocase, you will be misled and will not proceed in a
evaluate your mood or characteristic over the last twomatter that would be in your best interest. If you take
weeks or more. Also depression tests that are selfa depression test that meets the aforementioned
administered usually have pre-defined optionalcriterion, you can rely on the results and determine the
responses so there are not free form answers. Forbest course of action.
example, a test will have the individual choose "a", "b",