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Pathological Gambling Adaptation of the Yale-Brown Obsessive Compulsive Scale (PG-YBOCS)
Availability
Please contact Eric Hollander, M.D. eholland@montefiore.org for information about this instrument. This instrument can be found : J. E. Grant, C. B. Donahue, & B. L. Odlaug (Eds.), Treating Impulse Control Disorders : a Cognitive-Behavioral Therapy Program : Therapist Guide (pp. 109–112). Oxford: Oxford University Press.
Classification
Supplemental: Parkinson’s Disease
Short Description of Instrument
The Pathological Gambling version of the Yale-Brown Obsessive Compulsive Scale (PG- YBOCS) was modified from the Yale-Brown Obsessive Compulsive Scale (YBOCS) (Goodman, Price, Rasmussen, Mazure, Delgado, et al., 1989; Goodman, Price, Rasmussen, Mazure, Fleischmann, et al., 1989) The PG-YBOCS is a 10-item clinician- administered scale that measures the severity of pathological gambling within a set period of time (i.e., the past one / two week(s)) (Pallanti, DeCaria, Grant, Urpe, & Hollander, 2005; Pallanti, Grant, Urpe, & Hollander, 2011). Five questions (urge/thought subscale) access urges and thoughts associated with pathological gambling and five questions (behavior subscale) assess the behavioral component of the disorder (Pallanti et al., 2005). Both sets of questions address the time occupied by gambling, interference due to gambling, distress associated with gambling, resistance against gambling, and degree of control over gambling (Pallanti et al., 2005; Pallanti et al., 2011).
Scoring
Each item is scored 0 through 4. Scores are assigned according to the severity of the response with 0 = None, 1 = Mild, 2 = Moderate, 3 = Severe, and 4 = Extreme. The Total score is composed of the Urge/Thought Subscale Score plus the Behavior Subscale Score
Psychometric Properties
Reliability: Internal consistency was excellent with a Cronbach’s alpha = 0.97. Cronbach’s alpha for “gambling thoughts/urges” was 0.94 and for “gambling related behaviour” was 0.93; Test-retest reliability for each item ranged from 0.29 to 0.56; Inter-rater reliability between 3 raters for total score (ICC) = 0.97
Validity: Convergent validity: Total PG-YBOCS score correlated with the South Oaks Gambling Screen (SOGS) (r = 0.90); Discriminate validity: PG-YBOCS did not correlate with the Hamilton Anxiety Rating Scale (HARS) (r = -.005) and Hamilton Depression Rating Scale (HAM-D) (r = 0.08); Sensitivity to change: Correlation between PG-YBOCS and Clinical Global Impression-Improvement Scale (CGI) (r = -.69)
References
Pallanti S, DeCaria CM, Grant JE, Urpe M, & Hollander E. Reliability and validity of the pathological gambling adaptation of the Yale-Brown Obsessive-Compulsive Scale (PG-YBOCS). J Gambl Stud. 2005; 21(4), 431–443.
 
American Psychiatric Association. (2008). Handbook of psychiatric measures (2nd ed.). Washington, DC: American Psychiatric Pub.
 
Goodman WK, Price LH, Rasmussen SA, Mazure C, Delgado P, Heninger GR, & Charney DS. The Yale-Brown Obsessive Compulsive Scale. II. Validity. Arch Gen Psychiatry. 1989; 46(11), 1012–1016.
 
Goodman WK, Price LH, Rasmussen SA, Mazure C, Fleischmann RL, Hill CL, Heninger GR, and Charney DS. The Yale-Brown Obsessive Compulsive Scale. I. Development, use, and reliability. Arch Gen Psychiatry. 1989; 46(11), 1006–1011.
 
Hollander E, & Berlin HA. (2008). Impulse control disorder measures. In a. J. Rush, M. B. First, & D. Blacker (Eds.), Handbook of Psychiatric Measures (2nd ed., pp. 667–686). Arlington, VA: American Psychiatric Press.
 
Hollander E, & DeCaria C. (2008). Pathological gambling modification of the Yale-Brown Obsessive Compulsive Scale (PG-YBOCS). In A. J. Rush, M. B. First, & D. Blacker (Eds.), Handbook of Psychiatric Measures (2nd ed., pp. 677–678). Arlington, VA: American Psychiatric Press.
 
Pallanti S, Grant JE, Urpe M, & Hollander E. (2011). Pathological Gambling Adaptation of the Yale-Brown Obsessive Compulsive Scale (PG-YBOCS). In J. E. Grant, C. B. Donahue, & B. L. Odlaug (Eds.), Treating Impulse Control Disorders : a Cognitive-Behavioral Therapy Program : Therapist Guide (pp. 109–112). Oxford: Oxford University Press.
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