In a recent study, the short-term memory of college students under the influence of alcohol was examined in which the students were given a beverage with no alcohol, 1 ounce of alcohol or 2 ounces of alcohol. After the consumption of the beverage, the experimenter asked them to complete a forward digit span (how many digits they could remember in the order presented). What is the independent variable in this study?
Level of intoxication
Type of digit span task
Forward digit span
Amount of alcohol administered