Affect variability in relation to alcohol use frequency, intensity, and concurrent cannabis use among college students during the COVID-19 pandemic

Although alcohol use is related to daily affect, findings regarding affect variability—the degree to which individuals exhibit day-to-day fluctuations in affect—and alcohol use have been mixed. The present study assessed whether individuals who use alcohol tend to have higher positive and negative affect variability than individuals who do not, as well as whether higher affect variability is related to more frequent and intense alcohol use among individuals who use alcohol. We also explored whether affect variability differed between individuals who use alcohol and those who concurrently use alcohol and cannabis. College students (N = 1909; M = 20.1, SD = 1.3; 67.7% female; 76.6% white; n = 1147 individuals who use alcohol) completed a 21-day protocol between February-December 2021 in which they reported daily affect, number of drinks consumed, and any cannabis use. As hypothesized, individuals who used alcohol had higher positive and negative affect variability than individuals who did not. Among individuals who used alcohol, individuals with higher negative affect variability drank alcohol more frequently, and both higher positive and negative affect variability were related to more intense alcohol use. No differences emerged between individuals who used alcohol and those who concurrently used alcohol and cannabis. Taken together, higher positive and negative affect variability were related to higher odds of using alcohol and more frequent and intense use among individuals who use alcohol, over and above average affect. Higher affect variability could relate to alcohol use because of difficulties with emotion regulation or heightened sensitivity to the environment.