This study was attempted to make a comparison of the impulsivity and the stress tolerance between patients with alcohol dependence(alcoholic group) and control subjects(control group). The author examined 29 alcoholics and 29 control subjects by the impulsivity scale, Cognitrone test and Determination Unit test. The results were summarized as follows ： The scores o f IMPM(impulsivity-motor), IMPP(impulsivity-nonplanning) and IMP(impulsivity- total score) were significantly higher in alcoholic group than in control group(10.00土5.43 vs 6.38土4.84，t=2.56，d.f.=51，p <0.05 ； 15.22土6.68 vs 10.77土5.87，t=2.53，d.f.=51, p < 0.05 ； 36.67土 13.20 vs 27.12 土 11.73，t=2.78, d.f.=51, p < 0.05). The number of incorrect responses(Incorrect) of the Cognitrone test was significantly higher in alcoholic group than in control group(25.52± 13.26 vs 17.83土7.30，t=2.47，d.f.=43.53, p 〈0.05 in Student t-test). The number of timely right responses of the Determination Unit test, subset-3 was significantly lower in alcoholic group than in control group(62.79±43.13 vs 90.79土 52.02，t= - 2.23，d.f.=56, p 〈 0.05 in Student t-test). These results mean that the impulsivity is higher and the stress tolerance is lower in alcoholic than in control group. With these results, the impulsivity and the stress tolerance in alcoholic patients can be used as indicator of their treatment efficacy and prognosis
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