Impulsivity, Reflectivity, and High IQ

High reflectivity high-Q micromechanical Bragg mirror

The authors report on the fabrication and characterization of a micromechanical oscillator consisting only of a freestanding dielectric Bragg mirror with high optical reflectivity and high mechanical quality. The fabrication technique is a hybrid approach involving laser ablation and dry etching. The mirror has a reflectivity of 99.6%, a mass of 400 ng, and a mechanical quality factor Q of appr...

Impulsivity-Reflectivity and Cognitive Development in Preschoolers: A Longitudinal Analysis of Developmental and Trait Variance

Because impulsivity-reflectivity (IR), as measured by the Matching Familiar Figures Test (MFF; Kagan, 1965) and KRISP (Wright, Note 1), is correlated with age and IQ, we sought to determine how much variance in impulsivity-reflectivity is attributable to an impulsivity-reflectivity trait and how much to cognitive development, as measured by mental age (MA). Since the usefulness of measures of i...

Regional Gray Matter Density Associated with Cognitive Reflectivity–Impulsivity: Evidence from Voxel-Based Morphometry

When faced with a problem or choice, humans can use two different strategies: "cognitive reflectivity," which involves slow responses and fewer mistakes, or "cognitive impulsivity," which comprises of quick responses and more mistakes. Different individuals use these two strategies differently. To our knowledge, no study has directly investigated the brain regions involved in reflectivity-impul...

Femtosecond laser fabrication of high reflectivity micromirrors

High-quality freestanding micromirrors consisting of 40 dielectric layers on silicon have been fabricated by ultrashort-pulse laser ablation in combination with laser-assisted wet chemical etching. Backside material removal enables direct access to both faces of the dielectric coating. The amplitude reflectance of the micromirrors has been determined by Fabry–Pérot interferometry; a finesse in ...

Masters Thesis: High Efficiency IQ-sharing Transmitter