The SHQ includes items pertaining to smoking rate, age at onset of smoking initiation, and years of being a daily smoker. The SHQ has been used successfully in previous selleckchem Veliparib studies as a measure of smoking history (e.g., Zvolensky, Lejuez, Kahler, & Brown, 2004). Fagerstr?m Test for Nicotine Dependence. The FTND (Fagerstr?m, 1978; Heatherton et al., 1991) is a six-item scale designed to assess gradations in tobacco dependence (Heatherton et al., 1991). The FTND has shown good internal consistency, positive relations with key smoking variables (e.g., salivary cotinine; Heatherton et al., 1991), and high degrees of test�Cretest reliability (Pomerleau, Carton, Lutzke, Flessland, & Pomerleau, 1994). Minnesota Nicotine Withdrawal Scale.

The Minnesota Nicotine Withdrawal Scale (MWS; Hughes & Hatsukami, 1986) is a reliable and sensitive seven-item self-report scale that was used to measure nicotine withdrawal symptoms on the quit day. Participants were asked to rate their symptoms on a 4-point Likert-type scale (0 = not present to 3 = severe). Mood and Anxiety Symptom Questionnaire. The Mood and Anxiety Symptom Questionnaire (MASQ; Watson et al., 1995) is a 62-item self-report measure of affective symptoms. Participants indicate how much they have experienced each symptom on a 5-point Likert-type scale (1 = not at all to 5 = extremely). The Anxious Arousal scale (MASQ-AA) measures the symptoms of somatic tension and arousal (e.g., ��felt dizzy��). The Anhedonic Depression scale (MASQ-AD) measures a loss of interest in life (e.g., ��felt nothing was enjoyable��), with reverse-keyed items measuring positive affect.

Consistent with past work (Zvolensky, Solomon, et al., 2006), only the MASQ-AA and MASQ-AD subscales were used in the present investigation because they provide psychometrically sound and empirically specific composites for ��pure�� anxiety and ��pure�� depression symptoms, respectively (Watson et al., 1995). Anxiety Sensitivity Index. To assess sensitivity to, and discomfort with, anxiety and related internal states, we used the 16-item Anxiety Sensitivity Index (ASI; Reiss, Peterson, Gursky, & McNally, 1986). The ASI is a self-report measure on which respondents indicate, on a 5-point Likert-style scale, the degree to which they fear the potential negative consequences of anxiety-related symptoms and sensations. The ASI is unique from, and demonstrates incremental predictive validity relative Drug_discovery to, trait anxiety (McNally, 2002) and negative affectivity (Zvolensky, Kotov, Antipova, & Schmidt, 2005). Smoking calendar logs. Participants were asked to record their daily smoking behavior both 2 weeks prior to and following the cessation date, including whether or not they smoked each day.