This journal article describes a study that used Ecological Momentary Assessments (EMA) to examine the effect of urges on drug use among homeless youth. Using a sample of 66 homeless youth from a drop-in center in Houston, the researchers collected daily EMA to assess patterns of drug use and the correlation between real-time contextual factors and drug use. The study sample represents predominantly unsheltered and unstably housed homeless youth ages 18 to 25 with high incidences of drug use. Alcohol use was less prevalent in the study population. EMA data indicate that marijuana was the primary class of drug used. The researchers conclude that EMA can be used to predict drug use among homeless youth. Drug use treatment among homeless youth should address how experiencing discrimination, using pornography and alcohol, and using urge management strategies affect drug use. The authors recommend additional research to determine if EMA informed just-in-time interventions targeting these predictors can reduce use. (author abstract modified)