All the scores that were derived from impulsivity measures are listed in Table 1. There were two impulsivity measures used in the study: 1) Barratt impulsiveness scale, version 11 (BIS-11) [36, 37], a self-rated measure that assesses trait-related impulsivity, and 2) task-related behavioral (TRB) scores as derived from the performance of the gambling task. The BIS-11 consists of thirty items yielding a total score, and additional scores for three subcategories: motor impulsivity (acting without thinking), cognitive impulsivity (making decisions quickly), and non-planning (lack of prior planning or of future orientation). The TRB scores were of 3 categories: 1) reaction time for the task conditions and responses, 2) number of impulsive responses (IR), viz. IR-1 (selecting 50 after a single event of loss) and IR-2 (selecting 50 after two consecutive events of loss), and 3) selection frequency that represents the number of times a particular amount (10 or 50) was chosen after a losing or gaining trend in the previous 2 to 4 trials. The gaining and losing trends were computed based on the resultant outcome of the cumulative account of
