 McKoon and Macfarland (2002) were among the first to study processing consequences of decompositional analyses along the lines of Dowty (1979). They provided evidence from reading times and lexical decision times that accomplishments \((\alpha\) CAUSE \(x\) BECOME IN-STATE) are inherently more complex than achievements \((x\) BECOME IN-STATE). Similarly, Gennari and Poeppel (2003) compared eventive predicates (which included accomplishments, achievements and activities) to statives and found that the former were more complex to process than the latter. Brennan and Pylkkänen (2010) extended this line of research to psychological verbs and compared accomplishments (e.g., scare) with statives (e.g.,  cherish) using reading time methods and magnetoencephalography (MEG). They also included a comparison of the simple psychological statives with modified sentences that required coercion (e.g., within half an hour, the child cherished the precious kitten). Reading times and MEG data indicated that accomplishments were more complex to comprehend than statives and, moreover, that the enhanced semantic complexity led to different MEG components than aspectual coercion. Finally, Coll-Florit and Gennari (2011) compared durative states and punctual event predicates (mostly achievements) and observed longer reading times of statives than of event predicates. They attributed this effect—which runs counter to what would be expected under a decomposition analysis—to the fact that durative situations occur in semantically more diverse contexts and elicit more diverse associations than event predicates which may modulate the required processing effort. Taken together, the existing studies provide evidence for complexity differences between the aspectual classes, lending support to decompositional analyses. However, not all issues are entirely solved yet and further research is required. 