Do emotion-induced blindness and the attentional blink share underlying mechanisms? An event-related potential study of emotionally-arousing words

When two targets are presented within approximately 500 ms of each other in the context of rapid serial visual presentation (RSVP), participants’ ability to report the second target is reduced compared to when the targets are presented further apart in time. This phenomenon is known as the attentional blink (AB). The AB is increased in magnitude when the first target is emotionally arousing. Emotionally arousing stimuli can also capture attention and create an AB-like effect even when these stimuli are presented as to-be-ignored distractor items in a single-target RSVP task. This phenomenon is known as emotion-induced blindness (EIB). The phenomenological similarity in the behavioral results associated with the AB with an emotional T1 and EIB suggest that these effects may result from similar underlying mechanisms – a hypothesis that we tested using event-related electrical brain potentials (ERPs). Behavioral results replicated those reported previously, demonstrating an enhanced AB following an emotionally arousing target and a clear EIB effect. In both paradigms highly arousing taboo/sexual words resulted in an increased early posterior negativity (EPN) component that has been suggested to represent early semantic activation and selection for further processing in working memory. In both paradigms taboo/sexual words also produced an increased late positive potential (LPP) component that has been suggested to represent consolidation of a stimulus in working memory. Therefore, ERP results provide evidence that the EIB and emotion-enhanced AB effects share a common underlying mechanism.     

Telling in-tune from out-of-tune: widespread evidence for implicit absolute intonation

Absolute pitch (AP) is the rare ability to name or produce an isolated musical note without the aid of a reference note. One skill thought to be unique to AP possessors is the ability to provide absolute intonation judgments (e.g., classifying an isolated note as “in-tune” or “out-of-tune”). Recent work has suggested that absolute intonation perception among AP possessors is not crystallized in a critical period of development, but is dynamically maintained by the listening environment, in which the vast majority of Western music is tuned to a specific cultural standard. Given that all listeners of Western music are constantly exposed to this specific cultural tuning standard, our experiments address whether absolute intonation perception extends beyond AP possessors. We demonstrate that non-AP listeners are able to accurately judge the intonation of completely isolated notes. Both musicians and nonmusicians showed evidence for absolute intonation recognition when listening to familiar timbres (piano and violin). When testing unfamiliar timbres (triangle and inverted sine waves), only musicians showed weak evidence of absolute intonation recognition (Experiment 2). Overall, these results highlight a previously unknown similarity between AP and non-AP possessors’ long-term musical note representations, including evidence of sensitivity to frequency.     

Visual-motor problems of adolescents who attempt suicide.

Using the Canter Background Interference Procedure with the Bender-Gestalt Test, a group of 18 adolescent suicide attempters earned test scores indicating they had significantly more problems with visual-motor coordination than did a control group of 21 adolescents. There were also a greater number of school failures and behavior problems among these suicide attempters. The findings suggest that learning disabilities may be an unrecognized factor which increases the risk of suicide attempts by adolescents.     

Changing Race Boundary Perception by Reading Narrative Fiction

Participants read a story about a counterstereotypical Muslim woman and were then asked to determine the race of ambiguous-race Arab-Caucasian faces. Compared to a content-matched control condition, participants who read the narrative exhibited lower categorical race bias by making fewer categorical race judgments and perceiving greater genetic overlap between Arabs and Caucasians (Experiment 1). In Experiment 2, participants determined the race of ambiguous-race Arab-Caucasian faces depicting low and moderate anger. Emotion-related perceptual race bias was observed in the control conditions where higher intensity anger expressions led participants to disproportionately categorize faces as Arab. This bias was eliminated in the narrative condition.     

The Aesthetic Preference for Nature Sounds Depends on Sound Object Recognition

People across the world seek out beautiful sounds in nature, such as a babbling brook or a nightingale song, for positive human experiences. However, it is unclear whether this positive aesthetic response is driven by a preference for the perceptual features typical of nature sounds versus a higher‐order association of nature with beauty. To test these hypotheses, participants provided aesthetic judgments for nature and urban soundscapes that varied on ease of recognition. Results demonstrated that the aesthetic preference for nature soundscapes was eliminated for the sounds hardest to recognize, and moreover the relationship between aesthetic ratings and several measured acoustic features significantly changed as a function of recognition. In a follow‐up experiment, requiring participants to classify these difficult‐to‐identify sounds into nature or urban categories resulted in a robust preference for nature sounds and a relationship between aesthetic ratings and our measured acoustic features that was more typical of easy‐to‐identify sounds. This pattern of results was replicated with computer‐generated artificial noises, which acoustically shared properties with the nature and urban soundscapes but by definition did not come from these environments. Taken together, these results support the conclusion that the recognition of a sound as either natural or urban dynamically organizes the relationship between aesthetic preference and perceptual features and that these preferences are not inherent to the acoustic features. Implications for nature's role in cognitive and affective restoration are discussed.     

Victim Ambiguity: Bystander Intervention and Sexual Assault in the College Drinking Scene

Alcohol-related sexual assault is the most common form of sexual victimization on college campuses. Bystander intervention has been suggested as effective in preventing sexual assault, but its usefulness in sexual assaults that involve alcohol in particular has not yet been examined. The current study draws from intensive interviews with 30 undergraduates at a large Midwestern university to understand how students’ perceptions about sexual victimization and alcohol use affect their bystander behavior. Findings suggest that in alcohol-involved situations, the ambiguity of whether the woman is at risk and her perceived worthiness are significant barriers to intervention. Policy implications are discussed.     

The Equivalence of Contingency Structure for Intuitive Covariation Judgments About Height,Weight, and Body Fat

In a complete between-subjects design, 576 respondents judged covariations of problems framed around height, weight, and body fat. A verbal measure was used, consisting of prepositional statements representing relationships between two of the variables, as well as two types of response options: true or false, and a 7-point, bipolar, Likert-type scale. Consistent with previous findings, weight and body fat were unambiguously judged as if positively correlated; there were indications of a perceived negative correlation of height and body fat; and there was no evidence that participants regarded height and weight as positively correlated. Furthermore, there was no reliable evidence in support of framing effects. However, there were indications of influence for conditional format. These findings are discussed relative to previous and ongoing research efforts, and it is concluded that it may be inappropriate to regard variations in conditional format as parallel items. Measures involving all possible variations are considered fundamentally unbiased and consistent with I. Ajzen's (1988) principle of aggregation.