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Elizabeth Mechcatie Clinical Psychiatry News. Using the Rasch model to examine the utility of the South Oaks Gambling Screen across clinical and community samples. As is evident from Table 1no single item from the full NODS could operate alone as a brief screen for problem or pathological gambling. PetryPhD 3. In the general population, Chasing is a common subclinical behavior endorsed by many low-risk and at-risk gamblers as well as the majority of problem and pathological gamblers. Has there ever been a period when, if you lost money gambling one day, you would return another gambling screening tools to get even?permission from the Problem Gambling Research and Treatment Centre to do so. .. Review of potential screening and assessment tools for problem gambling. Problem Gambling Severity Index (PGSI). The PGSI, developed in Canada (Ferris & Wynne, ), is an abbreviated version of the original tool. While several short assessment tools for problem gambling have been developed, none of these screens are well-known or widely used.