Task switching under predictable and unpredictable circumstances

Andreadis, Nikolaos; Quinlan, Philip
October 2010
Attention, Perception & Psychophysics;Oct2010, Vol. 72 Issue 7, p1776
Academic Journal
Task switching was examined under predictable and unpredictable circumstances. In the first two experiments (in predictable conditions), the upcoming task was determined by the trial sequence. In unpredictable conditions, this task was signaled by the stimulus. Under speeded conditions, participants had to judge either the parity of a digit or the vowel/consonant nature of a letter. On bivalent trials, a digit and a letter were presented. On univalent trials, a task-relevant character occurred alongside a task-irrelevant character (e.g., '&'). Task-switching costs were found, and response times were generally slower on bivalent than on univalent trials. This crosstalk effect was reduced when a task repetition was expected. In the final experiment, trial predictability was defined according to whether a task precue was presented prior to or concurrently with the trial stimulus. Contrasting patterns of crosstalk effects were obtained and are discussed in terms of exogenous and endogenous factors that affect task switching.


Related Articles

  • Effects of extensive dual-task practice on processing stages in simultaneous choice tasks. Strobach, Tilo; Liepelt, Roman; Pashler, Harold; Frensch, Peter; Schubert, Torsten // Attention, Perception & Psychophysics;Jul2013, Vol. 75 Issue 5, p900 

    Schumacher et al. Psychological Science 12:101-108, () demonstrated the elimination of most dual-task costs ('perfect time-sharing') after extensive dual-task practice of a visual and an auditory task in combination. For the present research, we used a transfer methodology to examine this...

  • Temporal-order judgment of visual and auditory stimuli: modulations in situations with and without stimulus discrimination. Hendrich, Elisabeth; Strobach, Tilo; Buss, Martin; Müller, Hermann J.; Schubert, Torsten // Frontiers in Integrative Neuroscience;Aug2012, Vol. 6, p1 

    Temporal-order judgment (TOJ) tasks are an important paradigm to investigate processing times of information in different modalities. There are a lot of studies on how temporal order decisions can be influenced by stimuli characteristics. However, so far it has not been investigated whether the...

  • L'influence de la taille typique des objets dans une tâche de catégorisation. Ferrier, Laurent; Staudt, Arnaud; Reilhac, Gilles; Jimenez, Manuel; Brouillet, Denis // Canadian Journal of Experimental Psychology;Dec2007, Vol. 61 Issue 4, p316 

    This study explores the influence of typical size during a categorization task. The specificity of this experimental work is based on the homogeneity of the graphic stimuli size. We have created a typical size standard of our stimuli, that concerns the real size of the objects represented by the...

  • Stimulus-specific learning: disrupting the bow effect in absolute identification. Dodds, Pennie; Donkin, Christopher; Brown, Scott; Heathcote, Andrew; Marley, A. // Attention, Perception & Psychophysics;Aug2011, Vol. 73 Issue 6, p1977 

    The bow effect is ubiquitous in standard absolute identification experiments; stimuli at the center of the stimulus-set range elicit slower and less accurate responses than do others. This effect has motivated various theoretical accounts of performance, often involving the idea that...

  • Adaptation to biological motion leads to a motion and a form aftereffect. Theusner, Stefanie; Lussanet, Marc; Lappe, Markus // Attention, Perception & Psychophysics;Aug2011, Vol. 73 Issue 6, p1843 

    Recent models have proposed a two-stage process of biological motion recognition. First, template or snapshot neurons estimate the body form. Then, motion is estimated from body form change. This predicts separate aftereffects for body form and body motion. We tested this prediction. Observers...

  • THE ROLE OF EYE HEIGHT IN JUDGMENT OF AN AFFORDANCE OF PASSAGE UNDER A BARRIER. Marcilly, Romaric; Luyat, Marion // Current Psychology Letters;2008, Vol. 24 Issue 1, p12 

    According to the ecological theory of visual perception (Gibson, 1979), the perceiver-actor perceives affordances (i.e. opportunities of action) through multiple interactions with the environment. This perception is direct and consists in picking up information that specifies the relationship...

  • The shape of a hole and that of the surface-with-hole cannot be analyzed separately. Bertamini, Marco; Helmy, Mai // Psychonomic Bulletin & Review;Aug2012, Vol. 19 Issue 4, p608 

    Figure-ground organization has a central role in visual perception, since it creates the regions to which properties, such as shape descriptions, are then assigned. However, there is disagreement on how much shape analysis is independent of figure-ground. The reversal of figure-ground of a...

  • Negative Priming Under Rapid Serial Visual Presentation. Kin Fai Ellick Wong // PLoS ONE;May2012, Vol. 7 Issue 5, p1 

    Negative priming (NP) was examined under a new paradigm wherein a target and distractors were temporally separated using rapid serial visual presentation (RSVP). The results from the two experiments revealed that (a) NP was robust under RSVP, such that the responses to a target were slower when...

  • Visual 'Bildung' between Iconoclasm and Idolatry. Fritze, Yvonne; Haugsbakk, Geir; Nordkvelle, Yngve // NORDICOM Review;2016, Vol. 37 Issue 2, p17 

    The point of departure for this article is 'the visual turn', the proclaimed need for specific competencies, and furthermore the lack of clarity in the concepts and the lack of research that accompany the use of images. Terms like 'visual literacy' and 'visual competence' are compared with a...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics