Biomedical subjects

Magdalena Kanabus

Publications and source records attributed to Magdalena Kanabus.

3 recordsLinked to original sources

PubMed2004

Individual differences in temporal information processing in humans.

This article reviews some of our investigations concerning individual differences in temporal information processing. Two different levels of temporal information processing are discussed, namely the low-frequency (i.e., a few seconds time range) and the high-frequency processing level (i.e., some tens of milliseconds range) of temporal information with respect to various experimental paradigms. Evidence has been obtained indicating that the processing of temporal information on these two levels can be influenced by various subject-related factors, out of which age, gender, developmental disorders, auditory experience and localisation of damage in the brain seem to be the most significant.

Autistic Disorder↗

PubMed2004

Reproduction of auditory and visual standards in monochannel cochlear implant users.

The temporal reproduction of standard durations ranging from 1 to 9 seconds was investigated in monochannel cochlear implant (CI) users and in normally hearing subjects for the auditory and visual modality. The results showed that the pattern of performance in patients depended on their level of auditory comprehension. Results for CI users, who displayed relatively good auditory comprehension, did not differ from that of normally hearing subjects for both modalities. Patients with poor auditory comprehension significantly overestimated shorter auditory standards (1, 1.5 and 2.5 s), compared to both patients with good comprehension and controls. For the visual modality the between-group comparisons were not significant. These deficits in the reproduction of auditory standards were explained in accordance with both the attentional-gate model and the role of working memory in prospective time judgment. The impairments described above can influence the functioning of the temporal integration mechanism that is crucial for auditory speech comprehension on the level of words and phrases. We postulate that the deficits in time reproduction of short standards may be one of the possible reasons for poor speech understanding in monochannel CI users.

Acoustic Stimulation↗

PubMed2002

Temporal order judgement for auditory and visual stimuli.

The ability to perceive temporal order for pairs of auditory and visual stimuli was investigated in 12 volunteers. They were asked to make judgements about the order of presented stimuli by pressing two response buttons in a certain order. The performance on auditory and visual tests was studied in relation to the Inter-Stimulus-Interval (ISI), which varied from 5 to 500 ms. In general, the level of performance was similar for the two modalities and the criterion of 75% of correct responses was reached at ISI longer than 40 ms, independently of the modality. These findings are consistent with previous research. However, at ISI of 5 ms, a significantly higher level of correctness was observed for the auditory than visual task. Such a tendency was also observed for ISIs of 10, 20 and 40 ms. Better processing in the auditory compared to the visual task at shorter ISIs may result from a different kind of transduction mechanism at the level of receptive cells in each modality. Alternatively, subjects may use two different kinds of response strategies in the auditory modality, only one being comparable to the response strategy in the visual modality.

Acoustic Stimulation↗