What does "accounts" mean here? Description?

Context:
Buehner decided to test this hypothesis in two experiments using an event-anticipation paradigm. Participants in the experiments had to predict when a target light would flash. In the Baseline condition, the target flash was preceded by a signal light; in the Self-Causal condition, participants pressed a button to generate the target flash; in the Machine-Causal condition, a separate machine pressed the button to generate the target flash. According to the causal binding hypothesis, the Self-Causal and Machine-Causal conditions should lead participants to anticipate the target flash earlier relative to Baseline; according to intentional binding accounts, only participants in the Self-Causal condition would show early anticipation.