Temporal parameters as cues to phrasal boundaries: a comparison of processing by left- and right-hemisphere brain-damaged individuals

Two experiments were conducted to examine the ability of left- (LHD) and right-hemisphere-damaged (RHD) patients and normal controls to use temporal cues in rendering phrase grouping decisions. The phrase "pink and black and green" was manipulated to signal a boundary after "pink" or after "black" by altering pre-boundary word durations and pause durations at the boundary in a stepwise fashion. Stimuli were presented to listeners auditorily along with a card with three alternative groupings of colored squares from which to select the presented alternative. Results revealed that normal controls were able to use both temporal cues to identify the intended grouping. In contrast, LHD patients required longer than normal pause durations to consistently identify the intended grouping, suggesting a higher than normal threshold for perception of temporal prosodic cues. Surprisingly, the RHD patients exhibited great difficulty with the task, perhaps due to the limited acoustic cues available in the stimuli.     

Interhemispheric effects of simulated lesions in a neural model of single-word reading

A neural model consisting of paired cerebral hemispheric regions interacting via homotopic callosal connections was trained to generate pronunciations for 50 monosyllabic words. Lateralization of this task occurred readily when different underlying cortical asymmetries were present. Following simulated focal cortical lesions of systematically varied sizes, acute changes in the distribution of cortical activation were found to be most consistent with experimental data when interhemispheric interactions were assumed to be excitatory. During subsequent recovery, the contribution of the unlesioned hemispheric region to performance improvement was a function of both the amount of preexisting lateralization and the side and size of the lesion. These results are discussed in the context of unresolved issues concerning the mechanisms underlying language lateralization, the nature of interhemispheric interactions, and the role of the nondominant hemisphere in recovery from adult aphasia.     

How do location and control over the music influence listeners’ responses?

This study uses Mehrabian and Russell's ( 1974 ) Pleasure‐Arousal‐Dominance (PAD) model to consider how responses to both the music heard and overall in‐situ listening experience are influenced by the listener's degree of control over music selected for a particular listening episode and the location in which the listening takes place. Following recruitment via campus advertisements and a university research participation program, 216 individuals completed a background questionnaire and music listening task in a 3 (location) × 2 (experimenter‐ or participant‐selected music) design. After the listening task, participants completed a short questionnaire concerning the music they heard and the overall in‐situ listening experience. Results demonstrated that there was a positive relationship between control and liking for the music and episode, whether the former was considered in terms of: (1) whether the music was self‐selected or experimenter‐selected or (2) overt ratings of perceived control. Furthermore, the location and liking for the music were related to people's judgments of their enjoyment of the overall experience. This research indicates that the PAD model is a useful framework for understanding everyday music listening and supports the contention that, in a musical context, dominance may be operationalized as control over the music.     

Who should be on the $10 and $20 bills? Preferences based on gender,sexism, race,racism, political affiliation,and political ideology

In June 2015, the U.S. Department of the Treasury announced that a woman would replace Hamilton on the $10 bill. In April 2016, it announced that Harriet Tubman would replace Andrew Jackson on the $20 bill, instead. After each announcement, we surveyed nationally representative samples of American adults and asked them what they thought of these proposed changes for the $10 bill (Study 1, N = 209) and the $20 bill (Study 2, N = 208). Predictors of currency preferences were gender, race, political affiliation and their respective prejudices and biases—sexism, racism, and political ideology. On the basis of social identity, system justification, and social dominance theories we predicted that privileged groups (i.e., males, Whites) and groups who desire to maintain the status quo (i.e., Republicans, conservatives, sexist and racist individuals) would prefer to leave Hamilton on the $10 bill and Jackson on the $20 bill. Results were consistent with these predictions: Overall, we found that under‐represented groups and more liberal individuals support the proposals from the U.S. Department of the Treasury. These findings suggest a bill of money is not just a piece of paper. The person depicted on U.S. currency can be perceived as an in‐group or out‐group member and this can affect judgements in line with relevant social psychological theories.