Rapid allocation of temporal attention in the attentional blink paradigm

How fast can information of a first target (T1) in a rapid serial visual presentation be used for top-down allocation of attention in time? A valid cue about the temporal position of a second target (T2) was integrated into T1. The data show that 100 ms after T1 onset, T2 was identified better than without cue, raising the conditional T2 performance. T1 apparently triggers a facilitative effect of attention, known from other paradigms such as peripheral cueing.     

The relationship between sustained attention,attentional selectivity,and capacity

The Theory of Visual Attention (TVA; Bundesen, 1990) provides a quantitative account of visual attentional selectivity and capacity but does not include a parameter relating to sustained attention. We conducted two studies to examine the relationship between sustained attention and the TVA parameters relating to selectivity and capacity. In the first study (n=46; mean age=41, SD=10), we investigated the effects of self alerting during a combined whole and partial report task (CombiTVA). In the second study, 70 participants (aged 20–69), performed the CombiTVA and the Sustained Attention to Response Task (Robertson, Manly, Andrade, Baddeley, & Yiend, 1997). The results indicated that attentional selectivity and capacity were unaffected by self alerting, unrelated to sustained attention ability and robust to the adverse effects of time-on-task. These findings are in keeping with the idea of independent functions relating to sustained attention and attentional selectivity and capacity.     

An electrophysiological study of attention capture by salience: Does rarity enable capture?

Several behavioural studies have suggested that rarity is critical for enabling irrelevant, salient objects to capture attention. We tested this hypothesis using the N2pc thought to reflect attentional allocation. A cue display was followed by a target display in which participants identified the letter in a specific colour. Experiment 1 pitted rare, irrelevant abrupt onset cues (appearing on only 20% of trials) against target-relevant colour cues. The relevant colour cue produced large N2pc and cue validity effects even when competing with a rare, salient, simultaneous abrupt onset. Similar results occurred even when abrupt onset frequency was reduced to only 10% of trials (Experiment 2). Experiment 3 examined rare, irrelevant colour singleton cues (20% of trials). Despite being rare and salient, these singleton cues produced no N2pc or cue validity effect indicating little attentional capture. Experiment 4 greatly increased colour cue salience by adding four background boxes, increasing colour contrast and tripling the cue display duration (from 50 to 150 ms). Small cue validity and N2pc effects were obtained, but did not strongly depend on degree of rarity (20% vs. 100%). We argue that rarity by itself is neither necessary nor sufficient to produce attention capture.     

Assessing the effect of sound complexity on the audiotactile cross-modal dynamic capture task

Recent studies have provided evidence that dual-task interference is typically caused by a single-channel bottleneck, but the processing locus of the bottleneck has yet to be pinned down. A bottleneck locus at the response-selection stage is widely advocated, but an earlier locus would be consistent with most previous evidence. Four new experiments used the “locus of slack” method to investigate whether the stages postponed by the central bottleneck include stimulus classification, a very late stage of perceptual processing. The experiments varied stimulus classification difficulty for two different analogueue perceptual judgements. Experiment 1 found only modest absorption into slack for the difficulty of a spatial position judgement. Experiments 2–4 found virtually no absorption into slack for the difficulty of a box-width judgement. These results support a bottleneck locus beginning at or before the stage of stimulus classification and hence prior to the stage of response selection. Other evidence, however, leaves no doubt that response selection is also subject to bottleneck postponement. Two architectures are discussed that can account parsimoniously for both old and new results. One posits a single bottleneck resulting from a unified CPU-like central processor; the other posits multiple bottlenecks resulting from multiple processors accomplishing different substages of central processing.     

Attentional control settings prevent abrupt onsets from capturing visual spatial attention

When a visual distractor appears earlier than a visual target in a target-detection task, response time is faster if the distractor appears at the same location as the target. When a visual distractor appears concurrently with a visual target in a target-detection task, response time is slowed relative to when no distractor is presented. Both effects have been taken as evidence of the capture of visual spatial attention, yet capture by early distractors is contingent on top-down attentional control settings (ACSs), and capture by concurrent distractors is not. The present study evaluated whether this incongruity is attributable to the timing of distractors (earlier than vs. concurrently with the target), or to the employed comparisons (same location/different location vs. distractor/no distractor). Using a task that presented both early and concurrent distractors, we observed that, regardless of timing, capture was contingent on ACSs when assessed by the same-location/different-location comparison. This result suggests that, although irrelevant stimuli cause nonspatial purely stimulus-driven effects, the capture of visual spatial attention is contingent on ACSs.     

Interpersonal self‐support and attentional bias on negative and positive interpersonal information

Interpersonal self‐support is an indigenous Chinese personality concept. It represents the idealized notion of the kind of personality traits that help individuals deal with interpersonal problems and develop and maintain the harmonic and appropriate social relationships required in China's collectivistic and interdependent culture. It also was assumed to be a protective personality factor with regard to mental health and was found to be negatively related to psychosomatic symptoms. In the current study, cognitive processing of interpersonal information is assumed to be an underlying mechanism that connects interpersonal self‐support with interpersonal relationships and mental health. To test this hypothesis, we conducted two experiments to investigate whether attentional bias on positive and negative interpersonal information was related to high and low interpersonal self‐support. A spatial cueing task and the emotional Stroop task were administered to two samples of high and low interpersonal self‐support Chinese undergraduate students to measure attentional bias. The results from both experiments suggested that high interpersonal self‐support students had an attentional bias toward positive interpersonal information, while low interpersonal self‐support students preferentially attended to negative interpersonal information. Study 1 indicated that attentional bias toward positive interpersonal information was easily engaged in the high interpersonal self‐support group, while attentional bias toward negative interpersonal information was both easy to engage and difficult to disengage in the low interpersonal self‐support students. These results support our hypotheses that high interpersonal self‐support people engage in positive processing of interpersonal information, whereas low interpersonal self‐support people engage in negative processing of interpersonal information. The differential balance between positive and negative processing on interpersonal information may explain why interpersonal self‐support predicts both mental health and interpersonal relationships. In addition, the relational schema may explain why interpersonal self‐support is associated with an attentional bias toward interpersonal information.     

Eighteen-month-olds’ ability to make gaze predictions following distraction or a long delay

The abilities to flexibly allocate attention, select between conflicting stimuli, and make anticipatory gaze movements are important for young children's exploration and learning about their environment. These abilities constitute voluntary control of attention and show marked improvements in the second year of a child's life. Here we investigate the effects of visual distraction and delay on 18-month-olds’ ability to predict the location of an occluded target in an experiment that requires switching of attention, and compare their performance to that of adults. Our results demonstrate that by 18 months of age children can readily overcome a previously learned response, even under a condition that involves visual distraction, but have difficulties with correctly updating their prediction when presented with a longer time delay. Further, the experiment shows that, overall, the 18-month-olds’ allocation of visual attention is similar to that of adults, the primary difference being that adults demonstrate a superior ability to maintain attention on task and update their predictions over a longer time period.     

Control over experience? Magnitude of the attentional blink depends on meditative state

The information processing capacity of the human mind is limited, as is evidenced by the so-called ‘attentional-blink’ deficit. This deficit is believed to result from competition between stimuli for limited attentional resources. We examined to what extent advanced meditators can manipulate their attentional state and control performance on an attentional blink task. We compared the magnitude of the attentional blink between states of focused attention meditation (in which one focuses tightly on an object) and states of open monitoring meditation (in which one is simply aware of whatever comes into experience) in a sample of experienced meditators. We found a smaller attentional blink during open monitoring compared to focused attention meditation due to reduced T1 capture. Of note, this effect was only found for very experienced meditators (on average 10,704 h of experience). These data may suggest that very advanced practitioners can exert some control over their conscious experience.     

Attentional control as a prospective predictor of posttraumatic stress symptomatology

Attentional control may be used by trauma survivors to temporarily disengage and shift attention from threat salient information, allowing individuals to remain in, and habituate to, trauma-relevant contexts rather than using less adaptive regulatory strategies. Thus, greater attentional control abilities may be one factor that differentiates those who recover from trauma exposure from those who do not. In the present study, we examined attentional control as a prospective predictor of posttraumatic (PTS) symptoms over the course of two assessment sessions (T1 and T2). Consistent with the hypothesis that attentional control can be used to alleviate trauma-related distress, we predicted that an inverse relation between T1 attentional control and T2 PTS symptoms would be significantly stronger among participants who had experienced a traumatic event between time points (24% of the total sample: N = 85). Pre-T1 trauma history and T1 PTS symptoms served as covariates in regression analysis. Results revealed that T1 attentional control only predicted T2 PTS symptoms for participants who had experienced a traumatic event between time points. Thus, attentional control may be a protective factor against the development of PTS symptomatology in the aftermath of a traumatic event.     

Identifying words that emerge into consciousness: Effects of word valence and unconscious previewing

Words with negative valence capture attention and this increase in attentional resources typically enhances perceptual processing. Recently, data using continuous flash suppression (CFS) appear to contradict this. In prior research when Chinese words were unconsciously presented in CFS and contrast was raised until the word was identified, RTs to identify words with negative valence were slower than RTs to words with neutral valence. This result might be limited to situations where a logographic writing system is used and could reflect a type of cognitive aftereffect where previewing the word causes habituation. Data (N = 60) indicate that results generalize from a logographic (Chinese) to an orthographic writing system (English). In addition, when words were previewed in CFS RTs were slowed for words with negative valence relative to words with neutral valence and this was reversed when words were shown binocularly. Implications for theories of unconscious word processing and cognitive aftereffects are discussed.