Biomedical subjects

M Tlauka

Publications and source records attributed to M Tlauka.

4 recordsLinked to original sources

PubMed2000

Dual displays.

The study examined whether the simultaneous presentation of different map displays can aid situational awareness in spatial tasks relying on ego-centred and world-centred reference frames. Two commonly used aircraft displays, track-up and north-up maps, were compared with a dual aircraft display consisting of both track-up and north-up maps. Participants took part in two tasks: one relied on an ego-centred reference frame (ERF) and the other on a world-centred reference frame (WRF). The ERF task involved left/right judgements with respect to the aircraft's current heading while in the WRF task participants were asked to identify the compass heading associated with a landmark. A moderate amount of training resulted in a significant improvement with the dual maps in both the WRF task (relative to track-up maps) and the ERF task (relative to north-up maps). The findings are discussed with reference to how attention is allocated to visual displays.

Adolescent↗

PubMed2000

Hierarchical knowledge influences stimulus-response compatibility effects.

The influence of spatial stimulus grouping on stimulus-response compatibility effects was investigated in three experiments. Stimuli were grouped as part of a superordinate unit BY (1) perceptually organizing them (Experiment 1), (2) organizing them on the basis of semantic links (Experiment 2), or (3) arbitrary links (Experiment 3). In some instances the arrangement of the stimuli resulted in a conflict between two types of spatial relationship: one between stimulus and response and the other between superordinate unit and response. The experiments indicated that it was the latter relationship that mainly determined performance in the experiments. Reaction time analyses showed that responses were fastest if they spatially corresponded to the relative location of the superordinate unit of which the stimulus was part. The results are discussed with reference to hierarchical accounts of coding stimulus information.

Adult↗

PubMed1998

Mental imagery yields stimulus-response compatibility.

The present paper provides evidence for stimulus-response (S-R) compatibility effects in visual mental images. In two experiments subjects either studied a simple map (Experiment 1) or read a verbal description of the same map (Experiment 2), and then responded after generating a mental image of the presented information. Responses were made in a crossed-hand and in an uncrossed-hand manner, and the S-R arrangements were compatible and incompatible. In both experiments response latencies were found to be faster for compatible than for incompatible S-R mappings, and the crossed-hand condition resulted in increased response latencies relative to the uncrossed-hand condition. The findings are discussed with respect to the processing mechanisms involved in imagery and perception.

Adolescent↗

PubMed1996

Transfer of spatial information from a virtual to a real environment in physically disabled children.

A group 10 severely physically disabled children explored a to-scale computer simulation of a real multi-storey building. Following exploration, their knowledge of the spatial properties of the real environment was assessed by asking them to point to fire apparatus that was not visible from the test site. Subjects in a control group were asked to complete the same assessment tasks, but without the opportunity to explore either the real building or the computer simulation. The estimates of the disabled children were superior to the control group indicating good transfer of spatial knowledge. Route finding and recognition reports provided support for the pointing data in indicating good transfer of spatial information.

Child↗