Effects of phase changes in low-numbered harmonics on the internal representation of complex sounds

A series of experiments investigated the effect of phase changes in lownumbered single harmonics in target sounds that were either synthesized steady-state vowels or periodic signals having only a single formant. A matching procedure was used in which subjects selected a sound along a continuum differing in first formant frequency in order to get the best match with the target sound; perceptual effects of the phase manipulations in the target were detected as a change in the matched first formant frequency. Stimuli had to contain at least three harmonics to produce the effect, but it did not require a particular starting phase of the components. A suppression phenomenon is discussed, in which phase changes alter the phase-locking characteristics of auditory fibres tuned to low-numbered harmonics.     

Human and Global Identities: Different Prototypical Meanings of All-Inclusive Identities

The impact of identities encompassing all human beings (e.g., human and/or global identities) on intergroup relations is complex, with studies showing mostly positive (e.g., less dehumanization), but also negative (e.g., deflected responsibility for harm behavior), effects. However, different labels and measures have been used to examine the effects of these all-inclusive superordinate identities, without a systematic empirical examination of the extent to which they overlap or differ in their sociopsychological prototypical content. This study examined whether different labels activate the same contents in laypeople's conceptualization. Two hundred and forty-eight participants openly described one of six labels: “All humans everywhere”; “People all over the world”; “People from different countries around the world”; “Global citizens”; “Citizens of the world”; and “Members of world community.” Results from quantitative content analyses showed that the different labels activated different thematic attributes, representing differences in their core prototypical meaning. We propose that a general distinction should be made between labels that define membership based on human attributes (e.g., biological attributes) and those that evoke attributes characteristic of membership in a global political community (e.g., attitudinal attributes), as their effect on intergroup relations may vary accordingly.