Back to content-based validity

The development and validation of self-reported measuring instruments as a way of quantifying addictive behaviors is currently common practice. These instruments in articles about addiction, however, are dominated by methods involving structural equations and, therefore, evidence based on internal structure. This is the case even though it is known that there are other sources of evidence, such as test consequence, relationships with other variables, content and response processes, which are considered to contribute methodological rigor when researching addiction. Given the above, the author of this letter would like to offer readers an expert rater grid, which can be requested in its entirety and free of charge. Once the raters’ answers have been obtained, they can be quantified by Aiken’s V, a coefficient which is simple to calculate and easy to interpret.