Affect 1 Air Pollution, Indoor 1 Contingency management 1 Family Characteristics 1 Humans 1 JITAI 1 Operant theory 1 Real-Time data Secondhand smoke 1 Smokers 1 Tobacco Smoke Pollution 1 adult 1 affect 1 ambient air 1 analysis of covariance 1 article 1 comparative effectiveness 1 family size 1 feedback system 1 household 1 human 1 indoor air pollution 1 major clinical study 1 passive smoking 1 reinforcement (psychology) 1 smoking 1