Systems and methods for assessing resource allocation are provided. In some exemplary embodiments, the system uses an attention buffer to classify glances by a person and/or automated system, the buffer determining the impact the glances have on the person and/or automated system's situation awareness level. The attention buffer calculates on a continuous basis a buffer value that is representative of the situation awareness level for the person and/or automated system at a particular moment in time. The calculated buffer values, referred to as moment-to-moment buffer values, among other names, can be used as data points, and/or they can also be used to direct action by the system and/or person to alter the situation awareness level of the person and/or automated system.