@article{ref1,
title="The relationship of ordinal position and sibling sex status to cognitive abilities",
journal="Psychonomic science",
year="1964",
author="Rosenberg, B. G. and Sutton-smith, B.",
volume="1",
number="1-12",
pages="81-82",
abstract="The influence of the interaction of ordinal position and sibling sex status on cognitive activity was examined. <br><br>RESULTS generally confirm the superiority of the first born over the second born on cognitive activity. Directional trends suggest that the presence of amale sibling enhances quantitative scores, the presence of a female enhances language scores, males having a greater effect on females than vice versa.<p /><p>Language: en</p>",
language="en",
issn="0033-3131",
doi="10.3758/BF03342800",
url="http://dx.doi.org/10.3758/BF03342800"
}