Biomedical subjects

Anthony Lambert

Publications and source records attributed to Anthony Lambert.

3 recordsLinked to original sources

PubMed2003

Surgical gloves. How do you change yours?

Surgical gloves are frequently changed intraoperatively, and different techniques exist. We surveyed surgeons and scrub staff in our hospital and prospectively compared contamination between two glove changing techniques. We questioned 25 surgeons and 25 scrub staff regarding their intra-operative glove changing technique. Twenty scrub staff performed a standard 'surgical scrub', following which aliquots of fluorescent powder were applied symmetrically to each forearm prior to donning gown and gloves. Subjects were randomised to group 1-open technique (OT) followed by closed technique (CT), or group 2-CT followed by OT. Following unassisted glove change, glove and hand contamination was assessed.

Attitude of Health Personnel↗

PubMed2003

The influence of a salience distinction between bilateral cues on the latency of target-detection saccades.

The spatial cueing paradigm, with saccades to targets as the method of response, was used to investigate the influence of two simultaneously presented cues on the orienting of visual attention. Participants were presented with bilateral cues, one of which was perceptually salient (high luminance) relative to the other. They participated in one of three conditions: in the 'bright side likely' condition targets usually (p =.8) appeared near the more salient cue; in the 'dim side likely' condition targets usually (p =.8) appeared near the less salient cue; and in the 'neutral' condition the arrangement of the cues was uninformative with respect to target location. Brief SOAs (0, 50, 100 and 150 ms) were employed. Rapid reflexive orienting to the more salient stimulus was observed in the neutral condition: saccadic latencies were faster when the target appeared near the bright cue, and this was found even across the two shortest SOAs. However, this reflexive orienting was suppressed in both the bright side likely and dim side likely conditions: the advantage observed at the bright cue's location across the two shortest SOAs in the neutral condition was significantly attenuated in the two contingent conditions. Results point to rapid expectancy-based interference in the reflexive process of attention capture.

Attention↗

PubMed2003

Do isoluminant color changes capture attention?

Four experiments are reported in which the effects of peripheral cues on visual orienting were investigated. In the luminance condition, the cues consisted of a peripheral change in stimulus luminance. In the isoluminance condition, the cues consisted of an isoluminant color change, using the transient tritanopic technique. In Experiments 1 and 2, it was found that peripheral luminance cues captured attention, whereas peripheral isoluminance cues did not. In Experiments 3 and 4, the participants detected a peripheral target that was also isoluminant with the background. Under these conditions, it was found that both luminance and isoluminance cues captured attention. The results are discussed in terms of the roles of the dorsal and ventral streams in visual orienting, and it is concluded that our findings provide partial support for the contingent involuntary orienting hypothesis of C. Folk and colleagues.

Attention↗