The effect of smoking on sensory and attentional masking

This study examined the influence of smoking on low-level sensory and higher level visual cognitive abilities. Three groups (nonsmokers, deprived smokers, and nondeprived smokers) of 22 observers were tested using a visual target discrimination task. To assess sensory and visual cognitive differences, a masking task developed by Enns and Di Lollo (1997) was used. In the task, the target was masked by either a contour mask (contour masking) or an object mask (attentional masking by object substitution). The strongest masking effects were found in the group of nondeprived smokers, for both sensory and attentional masking. This pattern of results as well as results in the deprived smokers indicated changes in transient visual processing channels due to the acute actions of nicotine, not mediated by withdrawal relief.     

同伴、父母对青少年吸烟认识、吸烟行为的相对影响力

以1042名初一至高三学生为被试,考察了最要好同伴、父母对青少年吸烟认识和吸烟行为的相对影响力,以及同伴和父母对青少年吸烟行为的影响方式和影响途径。结果发现:(1)与父母作用相比,最要好同伴吸烟行为和态度对青少年吸烟认识的作用力要更大。但在不同的群体上,父母的影响力加强了;(2)与青少年吸烟认识相比,父母对青少年吸烟行为的作用力加大了,这种影响力同样表现在不同的群体上;(3)青少年的吸烟认识可以显著地预测其吸烟行为;(4)最要好同伴吸烟行为和态度、父母吸烟行为、青少年对吸烟的认识可以直接影响青少年的吸烟行为,而且最要好同伴吸烟行为和态度又通过青少年的吸烟认识对其吸烟行为产生间接的作用;(5)最要好同伴吸烟行为对青少年吸烟行为的影响力要大于父母的影响力。     

The synergistic effect of smoking and serum cholesterol on coronary heart disease

Cigarette smoking is a strong predictor of coronary heart disease (CHD), but much of the variance in determining which smokers will, and which will not, suffer from CHD remains unexplained. This review examines evidence of a synergistic interaction effect of smoking and elevated serum cholesterol on CHD morbidity and mortality. Evidence is also presented to support the notion that, in part, serum cholesterol, like smoking, is an index of a behavioral risk factor. Such a synergistic interaction is determined to exist, although improvements in methodology are needed to more clearly identify its magnitude. The review suggests that behavioral treatments aimed at smoking cessation and dietary modification should be focused specifically on the more than 25 million young and middle-aged Americans who smoke and have elevated serum cholesterol. In this way, such treatments may increase their effectiveness in lowering the risk of CHD (benefit) without necessarily increasing their effort (cost).     

The effect of smoking on brainstem auditory evoked potentials in positive- and negative-symptom schizophrenia

Studying brainstem auditory evoked potentials (BAEPs) and comparing the specific waves in smokers vs nonsmokers in both positive- and negative-symptom schizophrenia may elucidate the role of smoking in information processing. BAEPs were recorded in 40 patients with schizophrenia; 20 had predominantly positive symptoms (10 smokers and 10 nonsmokers) and 20 had predominantly negative symptoms (10 smokers and 10 nonsmokers). The severity of positive and negative symptoms was assessed by scale of assessment of positive symptoms and scale of assessment of negative symptoms (SANS). The BAEP results were compared with 15 healthy control individuals matched with the patients by age, sex, and cultural background. The smokers with negative symptoms showed a significant increase in the alogia, summary, and composite scores of SANS as compared to the nonsmokers. Although, most of the BAEP abnormalities were among patients with positive symptoms. The effect of smoking on the BAEPs was only in patients with negative symptoms. We also studied the interaction between smoking factor (smokers vs nonsmokers) and group type (group with mostly positive symptoms vs group with mostly negative symptoms) on the BAEPs and found a significant difference only for the first-wave latency mainly on the right side (P=0.012). The absence of a significant effect of smoking on most of the parameters of the BAEPs on interaction with the group factor suggests that the effect of smoking on the BAEPs is more apparent when negative symptoms prevail. However, studies are warranted to substantiate this finding.     

The effects of beliefs about smoking and health on smoking cessation

The purpose of this study was to examine whether beliefs of an American sample about smoking and health, as defined by cognitive orientation theory, would determine those smoking cessation program participants who would become abstainers and those who would not. Although the smoking cessation program was not designed to influence the specific kinds of beliefs studied, subscales measuring two of the four types of beliefs differentiated participants who would become abstainers from those who would not. Abstainers tended to have stronger goal beliefs about their desire to quit smoking, and stronger beliefs about the health-related implications of smoking. Participants' beliefs that they could resist an urge to smoke, which implied the use of coping skills, were more important in determining who would abstain from smoking than was their confidence that they could quit smoking, which implied the use of willpower.     

The effects of self-modeling on cigarette smoking behavior

Two studies of self-modeling are described. Study 1 investigated whether self-modeling would inhibit cigarette smoking behavior. Fourteen cigarette smokers (four males and 10 females) served as subjects for a repeated-measures design. In the self-modeling condition, the subjects watched themselves on a television monitor while smoking; in the control condition, they watched a short cartoon film on the same monitor, also while smoking. The following were measured: (1) the amount of tobacco consumed, (2) the amount of time lit cigarettes were in contact with the subjects’ lips, and (3) the subjects’ physiological responses (GSRs). Study 2 investigated the role of cognitive factors in self-modeling. It followed much the same self-modeling procedures as Study 1. However, unlike Study 1, it incorporated a manipulated cognitive variable: attitudes toward cigarette smoking. Self-modeling reduced the amount of smoking relative to the control condition in Study 1. In Study 2 it was found that cognitive factors influenced the amount of smoking. Smoking increased in subjects supplied with information favorable to smoking, whereas it decreased in those supplied with information unfavorable to smoking. These findings and additional research on the efficacy of self-modeling relative to other procedures suggest the importance of cognitive factors in self-modeling.     

The natural history of cigarette smoking: predicting young-adult smoking outcomes from adolescent smoking patterns

Assessed the magnitude of risk that adolescent cigarette smoking carries for adult smoking. Using a longitudinal, prospective design, results indicate that even infrequent experimentation in adolescence significantly raises the risk for adult smoking and that regular (at least monthly) adolescent smoking raises the risk for adult smoking by a factor of 16 compared to nonsmoking adolescents. Relative risk was also increased by an early onset of smoking and by a stable, uninterrupted course from experimentation to regular smoking. Relative risk did not significantly vary by age or sex. The continuity of smoking behavior between adolescence and adulthood supports the importance of primary prevention programs directed at adolescent populations.     

Quitting smoking: The importance of non-smoker identity in predicting smoking behaviour and responses to a smoking ban

Objective: We examined how ‘smoker’ and ‘non-smoker’ self- and group-identities and socio-economic status (SES) may predict smoking behaviour and responses to antismoking measures (i.e. the Dutch smoking ban in hospitality venues). We validated a measure of responses to the smoking ban.

Design: Longitudinal online survey study with one-year follow-up (N = 623 at T1 in 2011; N = 188 at T2 in 2012) among daily smokers.

Main outcome measures: Intention to quit, quit attempts and ‘rejecting’, ‘victimizing’, ‘socially conscious smoking’ and ‘active quitting’ responses to the smoking ban.

Results: Non-smoker identities are more important than smoker identities in predicting intention to quit, quit attempts and responses to the smoking ban, even when controlling for other important predictors such as nicotine dependence. Smokers with stronger non-smoker identities had stronger intentions to quit, were more likely to attempt to quit between measurements, and showed less negative and more positive responses to the smoking ban. The association between non-smoker self-identity and intention to quit was stronger among smokers with lower than higher SES.

Conclusion: Antismoking measures might be more effective if they would focus also on the identity of smokers, and help smokers to increase identification with non-smoking and non-smokers.     

The effectiveness of narrative versus informational smoking education on smoking beliefs,attitudes and intentions of low-educated adolescents

Objective: This study tests the effectiveness of narrative versus informational smoking education on smoking beliefs, attitudes and intentions of low-educated adolescents.

Design: A field experiment with three waves of data collection was conducted. Participants (N = 256) were students who attend lower secondary education. At the first and third waves, they completed a questionnaire. At the second wave, 50.8% of the participants read a smoking education booklet in narrative form and 49.2% read a booklet in informational form. After reading, all participants also completed a questionnaire at wave 2.

Main outcome measures: Beliefs about negative consequences of smoking, attitudes towards smoking and intentions to smoke were measured.

Results: Repeated measures analyses with time as a within-subjects factor and condition as a between-subjects factor showed that beliefs about smoking were more negative at Wave 2 compared to Wave 1, irrespective of condition. However, attitudes towards smoking were more positive at Wave 3 compared to Wave 1 when participants had read the narrative version.

Conclusion: These results show that narrative smoking education is not more effective than informational smoking education for low-educated adolescents and can even have an unintended effect for this target group by making attitudes towards smoking more positive.     

Joint effect of dopaminergic genes on likelihood of smoking following treatment with bupropion SR.

OBJECTIVE: To determine the relationship between joint variation in 2 dopaminergic genes and the likelihood of nonsmoking following treatment with bupropion sustained release (SR). DESIGN: Three hundred twenty-three participants in a bupropion SR smoking cessation effectiveness trial with 12-month follow-up were genotyped for variants of dopamine receptor gene DRD2 and dopamine transporter SLC6A3. MAIN OUTCOME MEASURES: Self-reported 7-day point prevalence of nonsmoking. RESULTS: Neither genotype alone was associated with 7-day point-prevalent nonsmoking at the 12-month follow-up. However, in the presence of the DRD2 A1 allele, SLC6A3 status was significantly associated with the likelihood of nonsmoking at the 12-month follow-up (individuals with DRD2 A1+ and SLC6A3 9- were more likely to be smoking). In the absence of the DRD2 A1 allele, the association between SLC6A3 status and nonsmoking was nonsignificant. CONCLUSION: Although these results are suggestive, a more compelling test is needed of the hypothesis that dopaminergic gene interaction underlies, in part, the likelihood of smoking following treatment with bupropion SR. Most likely this will come from larger studies involving prospective randomization to treatment based on genotype.     

The effects of smoking and urinary pH on a detection task

Performance was measured in a detection task over a period of 50 min. Subjects were either non-smokers or smoked more than 15 cigarettes per day. No smoking was allowed during the task, but smokers were all asked to smoke a cigarette immediately before doing it. One hour previously, subjects had been given a double-blind dose of a substance which would shift the pH of their urine either upwards or downwards, by small amounts sufficient to affect the rate of renal excretion of nicotine in the smokers. The pH manipulation had no effect on the performance of the non-smokers, who improved steadily throughout the task. After some 40 min of performance, the deprived smokers showed less improvement than the non-smokers, and the smokers whose urine had been made acid improved less than those whose had been made alkaline. The results are interpreted as evidence for a phasic effect on performance of small degrees of nicotine deprivation, which has consequences for theories of nicotine dependence.     

The intergenerational transmission of implicit and explicit attitudes toward smoking: Predicting adolescent smoking initiation

This study examined the intergenerational transmission of implicit and explicit attitudes toward smoking, as well as the role of these attitudes in adolescents’ smoking initiation. There was evidence of intergenerational transmission of implicit attitudes. Mothers who had more positive implicit attitudes had children with more positive implicit attitudes. In turn, these positive implicit attitudes of adolescents predicted their smoking initiation 18-months later. Moreover, these effects were obtained above and beyond the effects of explicit attitudes. These findings provide the first evidence that the intergenerational transmission of implicit cognition may play a role in the intergenerational transmission of an addictive behavior.