EDUC 187 Chapter 1: Ed187bNotesforQuizzam3
Document Summary
Effects of development and enculturation on number representation in the brain - daniel. Numerical magnitude - total number of items. Numerical difference - difference in totals of items between sets or the difference between two numbers. Pervasive view: symbolic systems mapped onto nonsymbolic number representations. Biology+culture in the construction of brain processes. Intraparietal sulcus is crucial area for processing numerical magnitude. Increased numeral distance decreases reaction time (aka 7 >6 slow but 100>1 fast) = distance effect. When the distance is held constant but the absolute size of the two numerical quantities is increased, reaction time increases and accuracy decreases. (aka. 10>5 slow but 100>95 fast but more wrong answers) fmri: intraparietal sulcus (ips): activates more when numerical distance decreases. Single-cell recordings from neurons in prefrontal cortices of monkeys. Specific neuron bunches for number values fire = tuning curve. Intraparietal sulcus responds to numerical and non numerical coding of magnitude fmri.
