Test of Validity & Reliability Free Essay Samples & Outline

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Sample Essay On Test of Validity & Reliability

The test of validity and reliability are extremely important in any research and they can be described as being pivotal in the field of psychological research. They should be assessed in a manner that is right to the scientific community and which follows the rights methods. There is a need for forensic testing especially in terms of persons that have violence, there is a need for violence assessment instrument. The psychosocial evaluation and Threat risk assessment is a 60 item self- report that is often designed to address the psychosocial characteristics that are often associated with violence. This paper assesses the concepts of validity and reliability in relation to norm population and their relation to the psychosocial evaluation and threat risk assessment.

Forensic psychology

The field of forensic psychology can be described as the intersection that exists between psychology with the justice system. Forensic Psychologists earned their credibility as mind assessors during the First World War when the Army Alpha was developed to test verbal skills and Army Beta came up to test the non verbal ones. Research has very intricate uses in the processes of Forensic psychology. Just like in any other field, previously done research brings with it a foundation of theoretical knowledge which is very important for one to understand any phenomenon in forensic psychology.

A psychologists’ knowledge about former researches helps him in deducing mental health, the connection between physical diseases and the patient’s state of psychological health. Secondly, research carries a myriad of evidences which guide the forensic psychologists in their practice. These are through valid methods used to assess people’s problems in relation to crime scenes and their states of mind at the time of the crime. The researched methods are more reliable than any trial and error ways of attempting solutions in addition to their obvious high degrees of validity (Meloy, 2014).

There is a need to norm populations in forensic testing. This is done because most of the psychological tests cannot be described as mastery tests with criterion references that can be used in the determination of performance, a different way that might be used classification of scores as either being low or high. Therefore, in order to effectively assess the overall performance, most psychological tests employ a standardization sample that allows the test makers to be able to create what can be described a normal distribution that can be used for comparison for any specific future test score.

There is a need for reliability in the forensic psychology assessment tests. The idea behind reliability in these tests is that there is a need for significant results that can be proved and are inherently repeatable (Andrade, 2009). Other forensic psychologists should be able to carry the same forensic analysis, under the same conditions and be able to generate the same results. This will be important as it will effectively reinforce the findings and consequently ensure that the wider scientific community is able to accept the proposed solutions and results.

Validity on the other in the field of forensic psychology can be said to encompass the whole entire experimental concept and it should be able to establish indeed whether or not the results that have been obtained from the experiments meet the requirements of the intended scientific research method. Using the forensic assessment tools there is a need to ensure internal validity through following the right experimental design being structured as well as encompassed in all the steps that should be followed when following the scientific research method.

It is of the essence to note that even if the results of the forensic assessment are great, validity is extremely important (Meloy, 2014). This is because results that are not valid are seen as being because of sloppy as well as inconsistent design that eventually compromises the integrity of the results in the eyes of the scientific community and courts.

In addition to this, researched and well documented findings bear the reputation of being more effective in use in court settings than the otherwise alternative forms and ways of treating people with mental disorders. Finally, for research and forensic psychology, it is a win-win situation in that each field builds unto the other (Andrade, 2009). This is because as researchers will give new information to the forensic psychologists, the ideas brought by forensic occurrences and experiences forms hypotheses for the upcoming researches. The research does also give about newer perspectives and ideas for use in forensic psychology and provides a link between the study to other related areas like behavioral, social and biological sciences. The statistics realize from these researches gives a picture of the severity of the problem at hand, or the improvements that are occurring on the ground.

The psychosocial evaluation and threat risk assessment is a 60 item self report that is often designed to address the psychosocial characteristics that are often associated with violence. The instrument is designed to assess the violence levels using several checklists for risk factors and warning signs developed form a norm referenced perspective. The instrument is a self-report and is consistent with understanding the client’s perspective (Meloy, 2014). Further, the instrument also involves the inclusion of the social desirability and inconsistency scales.

Therefore, validity is extremely important in the core of any experimental research method and design. It is important in psychosocial evaluation and threat risk assessment to use the right procedures in order to make the tests valid and reliable. There is also a need to examine the results in the validity section and question whether or not there any other possible causal relationships that might exist. There is always a chance that there might be another unknown factor that has contributed to the findings and results, however, this extraneous casual relationship may become minimized as validity and reliability of the results from the psychological assessments.


Andrade, J. T. (2009). Handbook of violence risk assessment and treatment: New approaches for mental health professionals. New York: Springer.
Meloy, J. R., & Hoffmann, J. (2014). International handbook of threat assessment.