Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 3 of 3
Full-Text Articles in Life Sciences
To See Or Not To See: Prestimulus Α Phase Predicts Visual Awareness, Kyle E. Mathewson, Gabriele Gratton, Monica Fabiani, Diane M. Beck, Tony Ro
To See Or Not To See: Prestimulus Α Phase Predicts Visual Awareness, Kyle E. Mathewson, Gabriele Gratton, Monica Fabiani, Diane M. Beck, Tony Ro
Publications and Research
We often fail to see something that at other times is readily detectable. Because the visual stimulus itself is unchanged, this variability in conscious awareness is likely related to changes in the brain. Here we show that the phase of EEG α rhythm measured over posterior brain regions can reliably predict both subsequent visual detection and stimulus-elicited cortical activation levels in a metacontrast masking paradigm. When a visual target presentation coincides with the trough of an α wave, cortical activation is suppressed as early as 100 ms after stimulus onset, and observers are less likely to detect the target. Thus, …
Male Aggression Towards Females In Hamadryas Baboons: Conditioning, Coercion And Control, Larissa Swedell, Amy Schreier
Male Aggression Towards Females In Hamadryas Baboons: Conditioning, Coercion And Control, Larissa Swedell, Amy Schreier
Publications and Research
No abstract provided.
The Fourth Level Of Social Structure In A Multi-Level Society: Ecological & Social Functions Of Clans In Hamadryas Baboons, Amy Schreier, Larissa Swedell
The Fourth Level Of Social Structure In A Multi-Level Society: Ecological & Social Functions Of Clans In Hamadryas Baboons, Amy Schreier, Larissa Swedell
Publications and Research
Hamadryas baboons are known for their complex, multi-level social structure consisting of troops, bands, and one-male units (OMUs) [Kummer, 1968]. Abegglen [1984] observed a 4th level of social structure comprising several OMUs that rested near one another on sleeping cliffs, traveled most closely together during daily foraging, and sometimes traveled as subgroups independently from the rest of the band. Abegglen called these associations “clans” and suggested that they consisted of related males. Here we confirm the existence of clans in a second wild hamadryas population, a band of about 200 baboons at the Filoha site in lowland Ethiopia. During …