The major conclusion to be drawn from Rosenzweig's study of the brains of rats raised in an enriched environment is that:
A) early experience shapes the way in which the brain develops
B) genes exert their greatest influence in guiding neural development during the prenatal period
C) too much "privilege" can cause the development of selfishness that cannot be undone through later training
D) neural development is for the most part determined by genes, and especially by those carried on the sex chromosomes

Question

Quizplus · Accepted Answer

Rosenzweig (1969) assigned infant rats to one of two conditions. Some were placed in standard cages where there were few options for their activities. Others, however, were assigned to "enriched" environments where there were running wheels, levers to press, steps to climb, and other "rat toys" to play with. Rats raised in the enriched environments developed brains that were not only heavier but also had thicker layers of cortex cells and more neurochemical activity at synapses, demonstrating that early experience shapes the way in which the brain develops.

The Major Conclusion to Be Drawn from Rosenzweig's Study of the Brains