Limits...
Predicting auditory space calibration from recent multisensory experience.

Mendonça C, Escher A, van de Par S, Colonius H - Exp Brain Res (2015)

Bottom Line: Multisensory experience can lead to auditory space recalibration.This study focuses on identifying the factors in recent sensory experience leading to such auditory space shifts.Sequences of five audiovisual pairs were presented, each randomly congruent or discrepant in space.

View Article: PubMed Central - PubMed

Affiliation: Department of Signal Processing and Acoustics, Aalto University, Otakaari 5, 02150, Espoo, Finland, Catarina.Hiipakka@aalto.fi.

ABSTRACT
Multisensory experience can lead to auditory space recalibration. After exposure to discrepant audiovisual stimulation, sound percepts are displaced in space, in the direction of the previous visual stimulation. This study focuses on identifying the factors in recent sensory experience leading to such auditory space shifts. Sequences of five audiovisual pairs were presented, each randomly congruent or discrepant in space. Each sequence was followed by a single auditory trial and two visual trials. In each trial, participants had to identify the perceived stimuli positions. We found that auditory localization is shifted during audiovisual discrepant trials and during subsequent auditory trials, suggesting a recalibration effect. Time did not lead to greater recalibration effects. The last audiovisual trial affects the subsequent auditory shift the most. The number of discrepant trials in a sequence, and the number of consecutive trials in sequence, also correlated with the subsequent auditory shift. To estimate the individual contribution of previously presented trials to the recalibration effect, a best-fitting model was developed to predict the shift in a linear weighted combination of stimulus features: (1) whether matching or discrepant trials occurred in the sequence, (2) total number of discrepant trials, and (3) maximum number of consecutive discrepant trials, (4) whether the last trial was discrepant or not. The selected model consists of a function including as properties the type of stimulus of the last audiovisual sequence trial and the overall probability of mismatching trials in sequence.

No MeSH data available.


Related in: MedlinePlus

Example of one sequence of trials. All sequences started with five audiovisual trials (1–5) and were followed by one auditory trial (6) and two visual trials (7 and 8). In the example, the audiovisual sequence started with a discrepant trial (1) and ended with a matching trial (5). For this subject, all-discrepant trials had the auditory stimulus 12° to the left of the visual stimulus. In this sequence, stimuli were presented in the left stimulus area
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4464732&req=5

Fig1: Example of one sequence of trials. All sequences started with five audiovisual trials (1–5) and were followed by one auditory trial (6) and two visual trials (7 and 8). In the example, the audiovisual sequence started with a discrepant trial (1) and ended with a matching trial (5). For this subject, all-discrepant trials had the auditory stimulus 12° to the left of the visual stimulus. In this sequence, stimuli were presented in the left stimulus area

Mentions: The stimuli were presented as sequences of different trial types. Each sequence started with five audiovisual trials and was followed by an auditory and two visual trials (Fig. 1 shows one example sequence). Each sequence had all stimuli within only one of the three stimulus areas. The sequences of five audiovisual trials had a random combination of matching and discrepant trials, and therefore the total number of possible sequence types was 32.Fig. 1


Predicting auditory space calibration from recent multisensory experience.

Mendonça C, Escher A, van de Par S, Colonius H - Exp Brain Res (2015)

Example of one sequence of trials. All sequences started with five audiovisual trials (1–5) and were followed by one auditory trial (6) and two visual trials (7 and 8). In the example, the audiovisual sequence started with a discrepant trial (1) and ended with a matching trial (5). For this subject, all-discrepant trials had the auditory stimulus 12° to the left of the visual stimulus. In this sequence, stimuli were presented in the left stimulus area
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4464732&req=5

Fig1: Example of one sequence of trials. All sequences started with five audiovisual trials (1–5) and were followed by one auditory trial (6) and two visual trials (7 and 8). In the example, the audiovisual sequence started with a discrepant trial (1) and ended with a matching trial (5). For this subject, all-discrepant trials had the auditory stimulus 12° to the left of the visual stimulus. In this sequence, stimuli were presented in the left stimulus area
Mentions: The stimuli were presented as sequences of different trial types. Each sequence started with five audiovisual trials and was followed by an auditory and two visual trials (Fig. 1 shows one example sequence). Each sequence had all stimuli within only one of the three stimulus areas. The sequences of five audiovisual trials had a random combination of matching and discrepant trials, and therefore the total number of possible sequence types was 32.Fig. 1

Bottom Line: Multisensory experience can lead to auditory space recalibration.This study focuses on identifying the factors in recent sensory experience leading to such auditory space shifts.Sequences of five audiovisual pairs were presented, each randomly congruent or discrepant in space.

View Article: PubMed Central - PubMed

Affiliation: Department of Signal Processing and Acoustics, Aalto University, Otakaari 5, 02150, Espoo, Finland, Catarina.Hiipakka@aalto.fi.

ABSTRACT
Multisensory experience can lead to auditory space recalibration. After exposure to discrepant audiovisual stimulation, sound percepts are displaced in space, in the direction of the previous visual stimulation. This study focuses on identifying the factors in recent sensory experience leading to such auditory space shifts. Sequences of five audiovisual pairs were presented, each randomly congruent or discrepant in space. Each sequence was followed by a single auditory trial and two visual trials. In each trial, participants had to identify the perceived stimuli positions. We found that auditory localization is shifted during audiovisual discrepant trials and during subsequent auditory trials, suggesting a recalibration effect. Time did not lead to greater recalibration effects. The last audiovisual trial affects the subsequent auditory shift the most. The number of discrepant trials in a sequence, and the number of consecutive trials in sequence, also correlated with the subsequent auditory shift. To estimate the individual contribution of previously presented trials to the recalibration effect, a best-fitting model was developed to predict the shift in a linear weighted combination of stimulus features: (1) whether matching or discrepant trials occurred in the sequence, (2) total number of discrepant trials, and (3) maximum number of consecutive discrepant trials, (4) whether the last trial was discrepant or not. The selected model consists of a function including as properties the type of stimulus of the last audiovisual sequence trial and the overall probability of mismatching trials in sequence.

No MeSH data available.


Related in: MedlinePlus