TABLE 2—
Question–Knowledge Item | No. | Presession, Mean (SE) | Postsession, Mean (SE) | t | P | Effect Size d |
1. There are several stop smoking medications such as nicotine replacement (patch, gum, etc.), Zyban, and Chantix that have been shown by scientific evidence to improve one’s chances of quitting smoking. | 1258 | 5.32 (0.04) | 5.94 (0.04) | 12.73 | < .001 | 0.38 |
2. Behavioral counseling, in a group or individual setting, has been shown by scientific evidence to improve one’s chances of quitting smoking. | 1255 | 5.16 (0.04) | 5.84 (0.04) | 14.49 | < .001 | 0.41 |
3. There are several alternative techniques, such as lasers, hypnosis, acupuncture, and herbs that have been shown by scientific evidence to improve one’s chances of quitting smoking. | 1253 | 4.03 (0.05) | 3.12 (0.05) | −15.39 | < .001 | 0.43 |
4. Nicotine replacement products (patch, gum, lozenge, etc.) can cause cancer. | 1246 | 2.95 (0.05) | 2.09 (0.05) | −16.36 | < .001 | 0.45 |
5. If I have a slip or setback, I will be judged by the program leader and participants and I will not be welcome to continue in the program. | 1246 | 2.10 (0.05) | 1.71 (0.04) | −8.12 | < .001 | 0.23 |
6. Nicotine replacement products (patch, gum, lozenge, etc.) are just replacing one addiction to cigarettes with another addiction. | 189 | 3.77 (0.05) | 2.78 (0.05) | 6.44 | < .001 | 0.47 |
7. I cannot tolerate any weight gain at all when I quit smoking, even a few pounds. | 190 | 4.24 (0.05) | 3.67 (0.05) | 4.24 | < .001 | 0.31 |
8. If I gain weight when I quit smoking, I will have health risks of being overweight that are greater than the health risks of smoking. | 189 | 3.11 (0.05) | 2.60 (0.05) | 3.48 | < .001 | 0.25 |
Note. For items 1–5, we used data imputation, and the means and significance tests are on the basis of n = 1494. The sample size was smaller for items 6–8 because we discontinued some items during the early phase of program delivery to decrease the burden on participants.