Selection history influences an attentional decision bias toward singleton targets.

Selection history effects are ubiquitous findings that show how implicitly encoding a target's feature or location on a trial can facilitate target activation on the following trial. Although the target-defining feature (e.g., color) is usually unpredictable, it is often relevant to determining the target on a given trial. The present study used a feature priming task, like the three-item oddball search task, but varied the target-defining feature (shape) orthogonal to the priming feature (color) that could influence target activation. On any trial the target could be a color singleton or not, and the target's feature could repeat or switch between trials. Larger priming effects were seen when the current target was a color singleton than a nonsingleton. Importantly, diffusion analyses showed that pretrial selection bias contributed to these larger priming effects. The results suggest selection history facilitates target activation through an attentional decision bias to select the object with the most recently attended color, and this attentional decision is easier when the current target is also distinct.

Pitch direction on the perception of major and minor modes.

One factor affecting the qualia of music perception is the major/minor mode distinction. Major modes are perceived as more arousing, happier, positive, brighter, and less awkward than minor modes. This difference in emotionality of modes is also affected by pitch direction, with ascending pitch associated with positive affect and decreasing pitch with negative affect. The present study examined whether pitch direction influenced the identification of major versus minor musical modes. In six experiments, participants were familiarized with ascending and descending major and minor modes. We then played ascending and descending scales or simple eight-note melodies and asked listeners to identify the mode (major or minor). Identification of mode was moderated by pitch direction: major modes were identified more accurately when played with ascending pitch, and minor modes were identified better when played with descending pitch. Additionally, we replicated the difference in emotional affect between major and minor modes. The crossover pattern in mode identification may result from dual activation of positive and negative constructs, under specific combinations of mode and pitch direction.

Are liberals really dirty? Two failures to replicate Helzer and Pizarro's (2011) study 1, with meta-analysis.

Helzer and Pizarro (2011) reported 2 studies that showed an influence of cleanliness cues on political attitudes. Specifically, when standing near a hand-sanitizer dispenser (signal of cleanliness and purity), individuals rated their political attitudes more conservative, compared with individuals who were standing near an empty wall. The present study reports 2 failed attempts to replicate the results of Study 1 in Helzer and Pizarro (2011). Additionally, a meta-analysis was conducted by combining the results of Helzer and Pizarro (2011), the failed replications reported here, and a third failed replication reported by Allison-Godfrey, Bronson, Luby, Salazar, and Holmes (2015). The meta-analysis revealed a very small effect of the presence of cleanliness cues on political attitudes. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

Evidence for early top-down modulation of attention to salient visual cues through probe detection.

The influence of top-down attentional control on the selection of salient visual stimuli has been examined extensively. Some accounts suggest all salient stimuli capture attention in a stimulus-driven manner, while others suggest salient stimuli capture attention contingent on top-down relevance. Evidence consistently shows target templates allow only salient stimuli sharing a target's features to capture attention, while salient stimuli not sharing a target's features do not. A number of hypotheses (e.g., contingent orienting, disengagement, signal suppression) from both sides of this debate have been proposed; however, most predict similar performance in the visual search and spatial cuing tasks. The present study combined a cuing task, in which subjects identified a target defined by its having a unique feature, with a probe identification task developed by Gaspelin, Leonard, and Luck (Psychological Science, 26, 1740-1750, 2015), in which subjects identified letters appearing in potential target locations just after the appearance of a salient cue that matched or did not match the target-defining feature. The probe task provided a measure of where attention was focused just after the cue's appearance. In six experiments, we observed top-down modulation of spatial cuing effects in response times and probe identification: Probes in the cued location were identified more often, but more when preceded by a cue that shared the target-defining feature. Though not unequivocal, the results are explained in terms of the on-going debate over whether top-down attentional control can prevent bottom-up capture by salient, task-irrelevant stimuli.

Selection and response bias as determinants of priming of pop-out search: Revelations from diffusion modeling.

During visual search, both top-down factors and bottom-up properties contribute to the guidance of visual attention, but selection history can influence attention independent of bottom-up and top-down factors. For example, priming of pop-out (PoP) is the finding that search for a singleton target is faster when the target and distractor features repeat than when those features trade roles between trials. Studies have suggested that such priming (selection history) effects on pop-out search manifest either early, by biasing the selection of the preceding target feature, or later in processing, by facilitating response and target retrieval processes. The present study was designed to examine the influence of selection history on pop-out search by introducing a speed-accuracy trade-off manipulation in a pop-out search task. Ratcliff diffusion modeling (RDM) was used to examine how selection history influenced both attentional bias and response execution processes. The results support the hypothesis that selection history biases attention toward the preceding target's features on the current trial and also influences selection of the response to the target.

Intertrial priming of popout search on visual prior entry.

When the features of a visual target and of nontargets are repeated between successive search displays, responding to a subsequent target is faster than when the features of the target and the nontargets switch between trials. This intertrial priming effect can influence perceptual processes, postperceptual processes (e.g., episodic retrieval), or both. Previous studies have shown that repeating irrelevant visual features that do not define the target or the response can influence postperceptual processes. The present study examined whether intertrial priming by irrelevant features also influences perceptual processes. Subjects completed a temporal order judgment task that appeared within a popout visual search display containing a color singleton among nonsingletons, all of which served as placeholders for two probes. Intertrial priming by the placeholder colors shifted the psychometric function. Specifically, the probes appearing at the color singleton in the switch condition needed to appear earlier than the probes at the color singleton in the repeat condition to be perceived simultaneous with the probes on a nonsingleton. This suggests there was an influence of intertrial priming by the irrelevant colors on visual prior entry; hence, repeating irrelevant features between trials can influence perpetual processes.

Intertrial priming of pop-out search influences the shift, skew, and dispersion of response time distributions.

Priming of pop-out (PoP), or intertrial priming, is the finding that responding to a singleton target is faster when a target's defining feature (e.g., color) and nontarget features are repeated between trials than when the target and nontarget features switch between trials. Facilitated responding may reflect priming's influence on selection, that is,  implicitly encoded features speed the selection of a matching target. In contrast, PoP effects may also reflect intertrial priming's influence on postselection processes, where episodic retrieval of a previous target is facilitated when its features match the current target. Lamy, Yashar, and Ruderman Attention, Perception, & Psychophysics, 73, 2160-2167 (2011) proposed a hybrid, dual-stage model that assumes intertrial priming influences both selection and postselection retrieval. To provide support for intertrial priming influencing more than one cognitive process, we examined priming's influence on the shift, skew, and dispersion of RT distributions in PoP tasks by fitting the exponential-Gaussian function to the RTs. Three experiments demonstrated that PoP effects at the level of mean RT were associated with changes in both the shift and skew of the underlying RT distributions. Importantly, Experiments 2 and 3 showed that manipulations intended to influence selection or postselection processes produced corresponding changes in the contributions of the distribution shift and skew to the PoP effects on mean RT. The results suggest more than one process is influenced by intertrial priming in visual search tasks, but readers should be cautious about relating specific processes to specific exponential-Gaussian parameters.

Components of working memory and visual selective attention.

Load theory (Lavie, N., Hirst, A., De Fockert, J. W., & Viding, E. [2004]. Load theory of selective attention and cognitive control. Journal of Experimental Psychology: General, 133, 339-354.) proposes that control of attention depends on the amount and type of load that is imposed by current processing. Specifically, perceptual load should lead to efficient distractor rejection, whereas working memory load (dual-task coordination) should hinder distractor rejection. Studies support load theory's prediction that working memory load will lead to larger distractor effects; however, these studies used secondary tasks that required only verbal working memory and the central executive. The present study examined which other working memory components (visual, spatial, and phonological) influence visual selective attention. Subjects completed an attentional capture task alone (single-task) or while engaged in a working memory task (dual-task). Results showed that along with the central executive, visual and spatial working memory influenced selective attention, but phonological working memory did not. Specifically, attentional capture was larger when visual or spatial working memory was loaded, but phonological working memory load did not affect attentional capture. The results are consistent with load theory and suggest specific components of working memory influence visual selective attention.

Response retrieval in a go/no-go priming-of-popout task.

Priming of popout is the finding that singleton search is faster when features of a target and of nontargets are repeated across trials than when the features switch. Theoretical accounts suggest that intertrial repetition influences perceptual and attentional selection processes, episodic retrieval processes, or both. The present study combined a popout search task with a go/no-go task. In Experiment 1, the nontarget distractors in each display carried the go/no-go feature, and in Experiment 2, the texture of all items carried the go/no-go feature. Results showed that the go/no-go task moderated the intertrial repetition effects. In Experiment 1, the target color elicited retrieval of the preceding distractor color and associated no-go response, resulting in larger interference effects. In Experiment 2, the target color elicited retrieval of the preceding target color and no-go response, resulting in reduced facilitation effects. Additional results from both experiments showed that the colors in a search display also influenced target selection on the following trial. Taken together, the results of both experiments suggest that intertrial repetition influences both early selection and postselection retrieval processes.

Using response time distributions to examine top-down influences on attentional capture.

Three experiments examined contingent attentional capture, which is the finding that cuing effects are larger when cues are perceptually similar to a target than when they are dissimilar to the target. This study also analyzed response times (RTs) in terms of the underlying distributions for valid cues and invalid cues. Specifically, an ex-Gaussian analysis and a vincentile analysis examined the influence of top-down attentional control settings on the shift and skew of RT distributions and how the shift and the skew contributed to the cuing effects in the mean RTs. The results showed that cue/target similarity influenced the size of cuing effects. The RT distribution analyses showed that the cuing effects reflected only a shifting effect, not a skewing effect, in the RT distribution between valid cues and invalid cues. That is, top-down attentional control moderated the cuing effects in the mean RTs through distribution shifting, not distribution skewing. The results support the contingent orienting hypothesis (Folk, Remington, & Johnston, Journal of Experimental Psychology: Human Perception and Performance, 18, 1030-1044, 1992) over the attentional disengagement account (Theeuwes, Atchley, & Kramer, 2000) as an explanation for when top-down attentional settings influence the selection of salient stimuli.

Randomized, double-blind, placebo-controlled, linear dose, crossover study to evaluate the efficacy and safety of a green coffee bean extract in overweight subjects.

BACKGROUND: Adult weight gain and obesity have become worldwide problems. Issues of cost and potential side effects of prescription weight loss drugs have led overweight and obese adults to try nutraceuticals that may aid weight loss. One promising nutraceutical is green coffee extract, which contains high concentrations of chlorogenic acids that are known to have health benefits and to influence glucose and fat metabolism. A 22-week crossover study was conducted to examine the efficacy and safety of a commercial green coffee extract product GCA™ at reducing weight and body mass in 16 overweight adults. METHODS: Subjects received high-dose GCA (1050 mg), low-dose GCA (700 mg), or placebo in separate six-week treatment periods followed by two-week washout periods to reduce any influence of preceding treatment. Treatments were counterbalanced between subjects. Primary measurements were body weight, body mass index, and percent body fat. Heart rate and blood pressure were also measured. RESULTS: Significant reductions were observed in body weight (-8.04 ± 2.31 kg), body mass index (-2.92 ± 0.85 kg/m(2)), and percent body fat (-4.44% ± 2.00%), as well as a small decrease in heart rate (-2.56 ± 2.85 beats per minute), but with no significant changes to diet over the course of the study. Importantly, the decreases occurred when subjects were taking GCA. Body mass index for six subjects shifted from preobesity to the normal weight range (<25.00 kg/m(2)). CONCLUSION: The results are consistent with human and animal studies and a meta-analysis of the efficacy of green coffee extract in weight loss. The results suggest that GCA may be an effective nutraceutical in reducing weight in preobese adults, and may be an inexpensive means of preventing obesity in overweight adults.

The visual hemifield asymmetry in the spatial blink during singleton search and feature search.

The present study examined a visual field asymmetry in the contingent capture of attention that was previously observed by Du and Abrams (2010). In our first experiment, color singleton distractors that matched the color of a to-be-detected target produced a stronger capture of attention when they appeared in the left visual hemifield than in the right visual hemifield. This replicated Du and Abrams and also revealed a difference between hemifields in the time course of this effect. Our second experiment suggested that this asymmetry is moderated by the tuning of attentional control settings: when the target was easier to detect the asymmetry was attenuated. Our third experiment showed that this asymmetry is also present during singleton detection: a color singleton distractor produced a larger capture effect in the left hemifield than in the right hemifield. Finally, our fourth experiment suggested that this asymmetry is moderated by the salience of the attention-capturing distractor: when the distractor was not salient, the asymmetry was attenuated. These results suggest that there are boundary conditions in the observed hemifield asymmetry in the contingent capture of attention and several underlying brain systems might be involved.

Cognitive load modulates attentional capture by color singletons during effortful visual search.

Color singletons that are irrelevant to locating a visual target do not typically capture attention if visual search is effortful. In contrast, when search is efficient color singletons are often found to capture attention. Such distraction by a color singleton can be modulated by single-task vs. dual-task manipulations when visual search is efficient. This is due, presumably, to the increased cognitive load in the dual-task condition, which interferes with top-down attentional control. This study investigated whether capture by a color singleton is also modulated by single-task vs. dual-task manipulations when visual search was effortful. The results of three experiments revealed that attentional capture effects were absent in a single-task condition and were present in a dual-task condition, but only when the identity of the color singleton is not associated with the target response-set. When the identity of the color singleton was relevant to the response-set it captured attention in both the single-task and in dual-task conditions.

Stimulus-driven attentional capture by a static discontinuity between perceptual groups.

After C. L. Folk, R. W. Remington, and J. C. Johnston (1992) proposed their contingent-orienting hypothesis, there has been an ongoing debate over whether purely stimulus-driven attentional capture can occur for visual events that are salient by virtue of a distinctive static property (as opposed to a dynamic property such as abrupt onset). The present study identified 3 methodological criteria for establishing that attentional capture is stimulus driven and not contingent on top-down attentional control settings. In 5 experiments, attentional capture occurred for a static discontinuity at the boundary between one group of homogeneous items (red Xs) abutted next to a group of homogeneous items that were featurally different (green Xs) within a single row. Experiment 1 intentionally violated one of the criteria for demonstrating stimulus-driven capture so as to establish that contingent attentional capture can occur for this novel type of static cue. In the remaining 4 experiments, even with all 3 criteria for stimulus-driven capture partially or completely satisfied, the static discontinuity captured attention. These attentional capture effects are the first to be obtained when all 3 criteria for establishing that they are purely stimulus driven have been satisfied.

A static color discontinuity can capture spatial attention when the target is an abrupt-onset singleton.

C. L. Folk, R. W. Remington, and J. C. Johnston's (1992) contingent involuntary orienting hypothesis states that a salient visual feature will involuntarily capture attention only when the observer's attentional set includes similar features. In four experiments, when the target's relevant feature was its being an abruptly onset singleton, attentional capture occurred for a static discontinuity cue that was the boundary between a group of red Xs contiguously joined to a group of green Os within a single row. Such an attentional capture effect is novel and contrary to Folk et al.'s (1992) hypothesis, because the attentional set for the target should have included abrupt onset but not color discontinuity, which was the feature that captured attention. These capture effects were involuntary because they occurred even when the target never appeared in the same location as the cue, and color could not have been used as a cue to signal the appearance of the target array (cf. B. S. Gibson & E. M. Kelsey, 1998).

Involuntary capture of visual-spatial attention occurs for intersections, both real and "imagined".

In three spatial precuing experiments, we demonstrate attentional capture by an intersection that occurs (1) between two lines that are not part of an enclosed object, and (2) between a line in the cuing array that is not physically present during target search and the invisible circumference of a perceptual circle formed by the elements in the target array. This capture effect conceptually replicates Cole, Gellatly, and Blurton's (2001) corner enhancement effect, in which responses are faster for targets presented near an object's corners rather than along its straight edges. However, it extends that effect by showing that it occurs even when the intersection is not part of an enclosed object and is not physically present during target search. More important, our capture effect occurred even though the target's position was not designated by a perceptually distinctive feature and was not predicted by the intersection's position. Thus, it seems that a line intersection--whether it be real or imaginary-automatically captures visual-spatial attention, contrary to Folk, Remington, and Johnston's (1992) and Gibson and Kelsey's (1998) views that such an involuntary capture of spatial attention is contingent on attentional control settings.

Displaywide visual features associated with a search display's appearance can mediate attentional capture.

Whether or not the capture of visual attention is driven solely by the salience of an attention-capturing stimulus or mediated by top-down control has been a point of contention since Folk, Remington, and Johnston (1992) introduced their contingent involuntary orienting hypothesis, which states that the capture of attention by a salient stimulus depends on its relevance to a feature distinguishing the target from nontargets. Gibson and Kelsey (1998) extended Folk et al.'s (1992) hypothesis by demonstrating that features associated with the appearance of the target display also mediate capture. Although similar to Folk et al. (1992), Gibson and Kelsey's displaywide contingent orienting hypothesis makes it difficult to demonstrate stimulus-driven capture, because an observer must always use some perceptible feature as a signal of the target display's appearance; hence, such features could always be mediating capture. The present article reviews and applies the logic of Gibson and Kelsey's and Folk et al.'s (1992) hypotheses to experiments from the attentional capture literature, and assesses whether previously reported capture effects were mediated by top-down attentional control. It concludes that these capture effects were not stimulus-driven.

Priming effects on temporal order judgments about words: perceived temporal priority or response bias?

In a temporal order judgment task, in which observers select which of two words appeared first, Stolz (1999) found that observers were more likely to select the word that had been semantically primed. Using repetition priming, we replicated Stolz's finding and extended her results by demonstrating that the effect was due to both (1) repetition priming causing the primed item to be perceived as having occurred earlier and (2) a response bias to guess the repetition primed item as the correct response. We discuss our new finding that priming induces an attentional precedence effect in the context of previous research suggesting that exogenous spatial cuing induces an attentional precedence effect but identity or semantic priming may not.