Studies consistently show that individual judgments are sensitive to error based on socio-cultural, biological, personal, environmental and other contextual influences. At an unconscious level, the human observer filters information (i.e., perceives it) though biases created through personal belief systems, values, attitudes, incomplete knowledge, and distractions in the environment (PAN, 2005).
However, this does not imply that personality tests are able to take the place of the professional judgment of the therapist/analyst. The personality test is not usually completed in isolation to other measures to determine aspect of the personality, as well as other sources of information (e.g., personal interview, GP diagnosis, input from family and friends, other psychometric tests). Personality tests can be assured of their validity and reliability when they have been professionally designed, and scored and interpreted by individuals trained to do so. Though these measures, a professional therapist/analyst is able to draw informed conclusions in a holistic manner, about the whole person, at this point in time.
With ensured high accuracy and consistency in scoring and outcome...
This is the result of years, sometimes decades of empirical research testing and retesting the construction, reliability and validity of the test.
The Appropriateness of Using a Battery of Tests
A study by Vujanovic, Zvolensky, Bernstein, Feldner, and McLeish (2006) investigated the effects of anxiety sensitivity (AS) by giving participants a battery of personality tests that measured mindfulness, and its importance in psychological well-being. The ability of a person to "be present" in the moment has been linked to low panic-related responses, which is important both in the workplace and in day-to-day functioning (e.g., driving a car). A sample of 248 participants completed the battery of self-report instruments. Due to the wide range of tests measuring different aspects of the personality (i.e., mindfulness, anxiety, panic, depression, and agoraphobia), a more holistic picture of each participant's personality was established. Also, the studies hypothesis was supported in that the battery of personality tests revealed a significant interaction between AS and mindfulness. Further, this interaction accurately predicted anxious arousal symptoms and agoraphobic cognitions, and did not predict depression.
A cross-sectional study by Kumar, Jorm, Parslow, and Sachdev (2006) investigate the prevalence and characteristics of depression for participants with mild cognitive impairment (MCI). The study was a longitudinal design called the Personality and Total Health Through Life 60+ (PATH 60+) Project. There were 2551 participants between the ages of 60-64 years who were randomly recruited by way of the electoral roll. Besides a