| dc.description.abstract | Rapid recalibration is a possible explanation to the brains ability of quickly adapting to asynchronous audiovisual stimuli (Roseboom, 2019). Using a simultaneity judgement task, an audiovisual speech video was presented to participants in a set of audio leads vision and vision leads audio asynchronies, in addition to synchrony (0 ms). A dependent variable SOA-1 was used to investigate the effects of previously exposed stimuli on current trials of four independent variables; point of subjective simultaneity (PSS) (average and crossover), audio lead thresholds (ALT) and video lead thresholds (VLT). Expectations was for PSS and VLT to be affected by previous trials, and that ALT would not be affected. Results indicated that VLT and PSS-average was affected by previous trials, which comply with findings from previous research (Roseboom, 2019; Van der Burg et. al., 2013). Unexpected results included that the ALT was affected by previous trials, and the conclusion suggests it being a consequence of a stringent hypothesis without a solid foundation in previous research. PSS is criticized through the significant findings for average and not for crossover. The measure for PSS-average resembles the PSS calculated from a symmetrical gaussian, which is known for its limitations (Yarrow et. al., 2011). The PSS-crossover more closely represent the raw data, as it is found at the crossing point of s-curves of independent AL and VL sides. ALT and VLT are discussed as alternative measures for research on audiovisual rapid recalibration as opposed to PSS, based on the PSS-crossover not being significant. | |