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Psychological Research
Gepubliceerd in: Psychological Research 3/2003

01-08-2003 | Original Article

Perceptual latency priming by masked and unmasked stimuli: Evidence for an attentional interpretation

Auteurs: Ingrid Scharlau, Odmar Neumann

Gepubliceerd in: Psychological Research | Uitgave 3/2003

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Abstract.

Four experiments investigated the influence of a metacontrast-masked prime on temporal order judgments. The main results were (1) that a masked prime reduced the latency of the mask's conscious perception (perceptual latency priming), (2) that this effect was independent of whether the prime suffered strong or weak masking, (3) that it was unaffected by the degree of visual similarity between the prime and the mask, and that (4) there was no difference between congruent and incongruent primes. Finding (1) suggests that location cueing affects not only response times but also the latency of conscious perception. (2) The finding that priming was unaffected by the prime's detectability argues against a response bias interpretation of this effect. (3) Since visual similarity had no effect on the prime's efficiency, it is unlikely that sensory priming was involved. (4) The lack of a divergence between the effects of congruent and incongruent primes implies a functional difference between the judgments in the temporal order judgment task and speeded responses that have demonstrated differential effects of congruent and incongruent primes (e.g., Klotz & Neumann, 1999). These results can best be interpreted by assuming that the prime affects perceptual latency by initiating a shift of attention, as suggested by the Asynchronous Updating Model (AUM; Neumann 1978, 1982).
vorige artikel Influences of response-activating stimuli and passage of time on the Simon effect
volgende artikel Unique transitions between stimuli and responses in SRT tasks: Evidence for the primacy of response predictions
Voetnoten
1
One might argue that this control does not sufficiently exclude eye movements, and that therefore an eye movement or express saccade account of the data is feasible. In a yet unpublished experiment with EOG recordings, we found a PLP effect of 45 ms with a priming SOA of 48 ms. When we reduced data by eliminating those trials in which a vertical eye movement occurred (vEOG amplitude of more than 40 µV; targets were presented on the vertical midline in this study), the priming effect was 46 ms. There was no difference between the two sets of data (t[8] < 1). Though stimulus conditions in this experiment were not strictly comparable to the experiments reported in the presented study, these data do not favor an eye movement account.
 
2
The reason why the control condition was presented with as many repetitions as the four primed conditions taken together was that an equal number of primed and unprimed trials was required for the SD task, which was designed to match the TOJ task as closely as possible.
 
3
The basic assumptions of this model have formerly been referred to as Weather Station Model (see Neumann, 1982; Neumann & Müsseler, 1990).
 
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Metagegevens
Titel
Perceptual latency priming by masked and unmasked stimuli: Evidence for an attentional interpretation
Auteurs
Ingrid Scharlau
Odmar Neumann
Publicatiedatum
01-08-2003
Uitgeverij
Springer-Verlag
Gepubliceerd in
Psychological Research / Uitgave 3/2003
Print ISSN: 0340-0727
Elektronisch ISSN: 1430-2772
DOI
https://doi.org/10.1007/s00426-002-0116-3

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