Hd 25 light headphones

Each participant completed the forward serial recall task using the stimuli described above. All participants completed the task with the acoustically distinct word set and again with the acoustically similar word set, with half of the participants assigned to the matched labels and half assigned to the mismatched labels. Word set order was counterbalanced across participants and the set of labels used for the acoustically similar words were assigned randomly. Prior to serial recall for each word set, participants were trained to map target vocoded words to the corresponding orthographic labels used in that word set and their proficiency was assessed until they could successfully map every target word to the correct response. All target words were presented through Sennheiser HD 25 Light headphones at an average level of 65 dB SPL. The experimental procedure was implemented in E-Prime (Psychology Software Tools, Pittsburgh, PA).