Directly perceiving Gibson: A further reply to Gyr.

In his 1972 critique of direct theories of perception, J. W. Gyr argued from the view that Gibson believes (a) that stimulus structure can determine perception and (b) that perceiving as a consequence of voluntary activity is virtually the same as perception that is not a consequence of voluntary activity. Since neither of these assumptions is found in Gibson's approach, Gyr's criticisms do not seem to apply. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Much dilution little load in Lavie and Torralbo's (2010) response: A reply.

Lavie and Torralbo (2010) present a response to the critique of load theory put forward by Tsal and Benoni (2010). We note that this response includes long discussions that dilute the major points of the debate and deals only with the first experiment in Tsal and Benoni, and we question whether it covers the broader critique we offer. In our reply, we argue against the points made by Lavie and Torralbo and propose that the “dilution” critique of the theory is justified. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effect of object onset on the distribution of visual attention.

There now exists considerable evidence to suggest that the appearance of a new object in the visual field captures visual attention. One of the consequences of this attentional capture is that the object initiates a redistribution of attentional resources across visual space. This is classically observed in the precuing paradigm in which the onset of an abrupt cue influences the processing of a subsequently presented target. The present research describes a new phenomenon that occurs as a result of a new object appearing in the visual field. A stimulus presented in a region of space adjacent to a comer of an onsetting object receives an enhancement of processing relative to a stimulus presented adjacent to one of the object's straight edges. With the use of 2 converging methods, evidence is presented that suggests that the effect is a higher order attentional phenomenon whereby greater resources become directed to the comers of objects. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Simon effect with and without awareness of the accessory stimulus.

The authors investigated whether a Simon effect could be observed in an accessory-stimulus Simon task when participants were unaware of the task-irrelevant accessory cue. In Experiment 1A a central visual target was accompanied by a suprathreshold visual lateral cue. A regular Simon effect (i.e., faster cue-response corresponding reaction times [RTs]) was found. Experiment 1B demonstrated that this effect cannot be attributed to perceptual grouping of the target and cue. Experiments 2A, 2B, and 2C showed a reverse Simon effect (i.e., faster noncorresponding RTs) when participants were not aware of the cue. In this condition, the Simon effect would occur relative to the reorientation of attention from the cue, which would initially capture attention, toward the target. This conclusion is supported by the results of Experiments 3A and 3B, in which the reorientation of attention was induced by having the target flash after its onset. With suprathreshold cues either a reverse or regular Simon effect was observed by using a 100-ms or ≥200-ms onset flashing interval, respectively, whereas with subthreshold cues a reverse Simon effect was found irrespective of the interval length. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Ratings and misratings: A reply to Mace and Warner.

Comments on K. C. Mace and H. D. Warner's (1973) study purporting to assess the extent of agreement among psychologists in their rating of journals. The authors criticize the initial selection of journals, the rating procedure, and the selection raters. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Load Theory of Selective Attention and Cognitive Control.

A load theory of attention in which distractor rejection depends on the level and type of load involved in current processing was tested. A series of experiments demonstrates that whereas high perceptual load reduces distractor interference, working memory load or dual-task coordination load increases distractor interference. These findings suggest 2 selective attention mechanisms: a perceptual selection mechanism serving to reduce distractor perception in situations of high perceptual load that exhaust perceptual capacity in processing relevant stimuli and a cognitive control mechanism that reduces interference from perceived distractors as long as cognitive control functions are available to maintain current priorities (low cognitive load). This theory resolves the long-standing early versus late selection debate and clarifies the role of cognitive control in selective attention. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The role of selective attention in the perception of multiple-element stimulus arrays.

To access the role of attention in visual processing, we have recorded single-unit activity from area V4 of visual cortex in macaque monkeys, and the results of these experiments provide a clear demonstration of the relationship between inter-stimulus competition and attention. Specifically, attended stimuli elicit larger responses than ignored stimuli, and these attention effects are increased when: a) the total number of distracting stimuli is increased; b) both attended and ignored stimuli are located inside the neuron's receptive field; and c) the attended and ignored stimuli are presented simultaneously rather than sequentially. We have also examined the role of inter-stimulus competition in human subjects by recording event-related potentials (ERPs), which are electrophysiological responses that can be recorded noninvasively from the scalp. In these experiments, we have found that the attention-sensitive N2pc wave is present when subjects focus attention onto target stimuli when they are surrounded by competing distractor stimuli, but is absent when the competition is eliminated (e.g. by removing the distractors). (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Experimental investigations of the genesis of visual space perception.

The methodology and findings of 3 categories of experimental studies are reviewed and evaluated: (a) studies of organisms that have been deprived of visual stimulation until the time of testing, (b) studies of newborn organisms that are tested soon after birth, and (c) studies in which E controls the visual stimulation to which O is exposed from birth to the time of testing. The evidence provided by these experiments suggests that conclusions about the genetic basis of space perception will differ depending on the stimulus correlates under consideration.—(47 ref.) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Is position "special" in visual attention? Evidence that top-down processes guide visual selection.

The role of spatial position in selective visual processing has been the source of recent debate. The present study, using undergraduates, attempted to reconcile various findings by exploring the influence of top-down processes (task instructions) while explicitly controlling for eye movements. Exp 1 demonstrated there was no inherent selection bias for stimuli similar to those used by A. H. C. van der Heijden et al (1996), suggesting that the tendency to select according to colour found by van der Heijden et al was due to task demands. Exp 2 further established the role of top-down factors by replicating the results of van der Heijden et al with the current authors' stimuli. Exp 3 demonstrated that selection can be switched from colour to position by changing the demands of the task. These results suggest that selection may be accounted for by task demands (e.g., instructions) with no priority access for position information. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Finding "Meaning" in Psychology: A Lay Theories Approach to Self-Regulation, Social Perception, and Social Development.

Much of psychology focuses on universal principles of thought and action. Although an extremely productive pursuit, this approach, by describing only the "average person," risks describing no one in particular. This article discusses an alternate approach that complements interests in universal principles with analyses of the unique psychological meaning that individuals find in their experiences and interactions. Rooted in research on social cognition, this approach examines how people's lay theories about the stability or malleability of human attributes alter the meaning they give to basic psychological processes such as self-regulation and social perception. Following a review of research on this lay theories perspective in the field of social psychology, the implications of analyzing psychological meaning for other fields such as developmental, cultural, and personality psychology are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

"Motivation sharpens exogenous spatial attention": Correction to Engelmann and Pessoa (2007).

Reports an error in "Motivation sharpens exogenous spatial attention" by Jan B. Engelmann and Luiz Pessoa (Emotion, 2007[Aug], Vol 7[3], 668-674). The supplemental materials link is as follows: http://dx.doi.org/10.1037/1528-3542.7.3.668.supp. (The following abstract of the original article appeared in record 2007-11660-020.) Although both attention and motivation affect behavior, how these 2 systems interact is currently unknown. To address this question, 2 experiments were conducted in which participants performed a spatially cued forced-choice localization task under varying levels of motivation. Participants were asked to indicate the location of a peripherally cued target while ignoring a distracter. Motivation was manipulated by varying magnitude and valence (reward and punishment) of an incentive linked to task performance. Attention was manipulated via a peripheral cue, which correctly predicted the presence of a target stimulus on 70% of the trials. Taken together, our findings revealed that the signal detection measure, reflecting perceptual sensitivity, increased as a function of incentive value during both valid and invalid trials. In addition, trend analyses revealed a linear increase in detection sensitivity as a function of incentive magnitude for both reward and punishment conditions. Our results suggest that elevated motivation leads to improved efficiency in orienting and reorienting of exogenous spatial attention and that one mechanism by which attention and motivation interact involves the sharpening of attention during motivationally salient conditions. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Capturing Attention When Attention "Blinks".

Four experiments addressed the question of whether attention may be captured when the visual system is in the midst of an attentional blink (AB). Participants identified 2 target letters embedded among distractor letters in a rapid serial visual presentation sequence. In some trials, a square frame was inserted between the targets; as the only geometric object in the sequence, it constituted a singleton. Capture effects obtained when the AB was most severe and when it was over were compared. There were 3 main results. First, capture occurred even when the AB was crippling, suggesting that a singleton exogenously engaged attention even when processing of a previous target was continuing apace. Second, when the singleton contained the key target feature, capture effects were clearly manifest. Third, even when the singleton did not possess the key target feature, it still succeeded in capturing attention, although the effects were both feeble and fleeting. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A reply to David R. Matteson's "Two transitions and two crises in youth."

Presents a reply to D. R. Matteson's (see record 1977-12487-001) critique of the author's explanation of transition and crisis in college youth. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

"The role of reinforcement symmetry and stimulus modality in successive delayed matching to sample in the rat": Correction.

Reports an error in "The role of reinforcement symmetry and stimulus modality in successive delayed matching to sample in the rat" by J. S. Cohen, M. Escott and P. Ricciardi (Canadian Journal of Psychology Revue Canadienne de Psychologie, 1984[Mar], Vol 38[1], 63-79). The last six words of the legend for Figure 1 should read "in the replication of Experiment 1." (The following abstract of the original article appeared in record 1985-05863-001.) 20 male Wister albino rats were trained and tested in asymmetrically and symmetrically reinforced successive delayed matching to sample (DMTS) tasks. The only difference between these discrimination problems was that correct omission of a leverpress to the test stimulus (S?), differing from the sample stimulus (S?), was reinforced in the symmetrically reinforced DMTS. Response biases during tests for retention of S? were reduced in the symmetrically reinforced DMTS. Greater losses in retention occurred to the visual than to the auditory S?. For the auditory S?, reduced response biases in the symmetrically reinforced DMTS led to reduced losses in S? retention scores over increased retention intervals. Methodological and theoretical implications are discussed in terms of the theory of signal detection. (French abstract) (28 ref). (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

"Movement and visual attention: The spotlight metaphor breaks down": Correction to Driver and Baylis.

Reports an error in "Movement and visual attention: The spotlight metaphor breaks down" by Jon Driver and Gordon C. Baylis (Journal of Experimental Psychology: Human Perception and Performance, 1989[Aug], Vol 15[3], 448-456). In this article, the display durations were incorrect and should be doubled to give the correct figures. The display durations are corrected in the erratum. (The following abstract of the original article appeared in record 1990-00258-001.) The interfering effects of distractor letters are known to diminish with increasing distance from the target letter (B. A. Eriksen and C. W. Eriksen, see record 1975-02247-001). This result is held to support spotlight models in which visual attention can only be assigned to contiguous regions of the visual field. However, the result is also consistent with the rival claim that attention is assigned to perceptual groups. Four experiments show that grouping of target and distractors by common motion can have more influence than their proximity. Distant distractor letters that move with a target letter produce more interference than static distractors that are nearer the target. Near distractors are equally ineffective if the target is static while they move. These results imply that attention is directed to perceptual groups whose components may be spatially dispersed. The spotlight metaphor seems inappropriate for visual attention in a dynamic environment. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Response Selection Modulates Visual Search Within and Across Dimensions.

In feature search tasks, uncertainty about the dimension on which targets differ from the nontargets hampers search performance relative to a situation in which this dimension is known in advance. Typically, these cross-dimensional costs are associated with less efficient guidance of attention to the target. In the present study, participants either had to perform a feature search task or had to perform a nonsearch task, that is, respond to a target presented without nontargets. The target varied either in one dimension or across dimensions. The results showed similar effects both in search and nonsearch conditions: Preknowledge of the target dimension gave shorter response times than when the dimension was unknown. Similar results were found using a trial-by-trial cueing. It is concluded that effects that typically have been attributed to early top-down modulation of attentional guidance may represent effects that occur later in processing. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Aging and Visual Masking: Sensory and Attentional Factors.

Visual tasks can yield quantitatively similar patterns of performance that reflect different underlying mechanisms in younger and older observers. In 3 experiments, we used the visual masking task of J. T. Enns and V. Di Lollo (1997) to examine 2 of these mechanisms: stimulus contrast and attention. Performance appeared to be equivalent for younger and older observers in some circumstances, although manipulation of contrast and attention suggested that older observers may use focal attention to enhance the perceptual clarity of the target. For older observers, impoverished visual representations may more readily be eliminated by manipulation of attention or by the presence of a mask, indicating that both attention and stimulus quality are important influences on performance. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Another example of a paradigm clash: A reply to Bixenstine's "criticisms."

Responds to V. E. Bixenstine's (1977) critique of W. W. Tryon's (see record 1977-04654-001) article on models of behavior disorder. The formal analysis paradigm from which Tryon operated is restated, and the way in which Bixenstine operated from the different phenomenology paradigm is demonstrated. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Visual attention and the perception of features and objects.

Feature integration theory (Treisman & Gelade, 1980) suggested that simple features are coded in parallel in a number of specialized feature maps, but that focussed attention is required to ensure the correct integration of features to specify objects. This is done by a serial scan through a master-map of locations, giving access to the features currently occupying the attended location. These are then integrated to form a representation of the object in the selected location. The present paper reviewed new evidence that has accrued since 1980 and elaborated the model to accommodate the recent findings. The proposal is that four different mechanisms may be involved in different conditions: selection of locations, directed by an externally controlled window of attention; selection by features through preattentive grouping; selection of objects; and selection for access to responses. (PsycINFO Database Record (c) 2010 APA, all rights reserved)