Steven F. Morgan

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The effects of varying times of cigarette deprivation on cognitive and performance tasks were examined. This study employed a between-subjects design in which five groups of smokers (9-10 subjects in each group) were compared on a vigilance task and cognitive measures as a function of length of deprivation (0, 2, 4, 8, or 24 hours). Each subject was tested(More)
Temporal patterns of smoking topography were studied in the natural environment. Six smokers smoked all cigarettes over a 10-day period using a small portable electronic recording device which allowed the measurement of a number of aspects of smoking topography. When the data were averaged in 2-hour blocks across the 10-day smoking period, all subjects(More)
100 persons referred for neuropsychological evaluation were administered both the Symbol Digit Modalities Test and the WAIS--R Digit Symbol subtest. The two sets of scores correlated 0.85, but standard scores derived from the Symbol Digit Modalities Test were significantly lower than standard scores based on Digit Symbol. The mean score on the former for(More)
A group of 35 alcoholics who indicated they had symptoms of phobia, panic, or both (the anxiety problem group) were compared to their matched controls who did not indicate having anxiety problems. Comparisons of relapse rates, reasons for relapse, and rates of emotional problems at six months posttreatment were made. Results showed that although relapse(More)
The effects of naltrexone on both mood and cognition were examined in overweight male subjects. Subjects were randomly prescribed, in a double-blind fashion, either placebo or naltrexone for 8 weeks. The results of the study showed that a chronic administration of a high dose of naltrexone (300 mg/day) does not significantly change mood or cognitive(More)
The relationships between the number of cigarettes smoked/day and the number of puffs/cigarette, puff duration, and total puff time/cigarette were studied. Data were collected on 12 regular smokers for all cigarettes smoked over a 3-day period in a nonlaboratory environment. Between-subject variability was substantial on each of the topographical measures.(More)
Laboratory studies examining the effects of cigarette smoking on behavior have routinely employed a variety of standardized smoking procedures. This study examined whether reaction time performance after smoking varied as a function of the cigarette smoking procedure employed. Twelve regular smokers were tested on a reaction time task after smoking on three(More)
Given the successful use of selective reminding measures of learning and memory in experimental research, initial normative and psychometric data was collected to assess the potential clinical utility of a selective reminding measure with children. Sixty-six 5- to 8-year-old children were administered counterbalanced alternate forms of the selective(More)
Situational factors related to smoking behavior in the natural environment were studied. Six subjects smoked all cigarettes over 10 days with a portable, electronic recording device which measured a number of frequency and time-based features of smoking. Subjects also coded activities and internal states associated with each cigarette smoked. Across(More)