其他摘要：In order to study the influence of three types of envíronments (standard laboratory, enriched laboratory, and simulation of natural envirenment). on two tasks (retention in the delayed reactíonj , and discrimina· tion (reversal shifts). two pairs of mice were raised in each of the environments. The mice used in the experíment belonged to a second generatíon, raised in the particular envíronment, Sixteen mice were randomly selected, 22 days old: half of the subjects were tested in the reversal-shift situatíon, and the other hald in the delayed-reaction test. R.esuIts indicated that mice raised in two of the environments (enriched laboratory and simulation of natural environment) had higher performance Ievels, both in the delayed-reactlon ud in the reversal·shift. than those raised in the standard laboratory environment
