The way immigration policies changed in the 1920s is: Immigration was more restricted.
Step-by-step explanation:
The Immigration Act of 1924 restricted the number of immigrants from entering America through governmental origins quota.
The quota provided immigration visas to only three percent of the total population of the foreign-born of each citizenship. Immigrants from Asian countries were completely excluded.
As, the literacy test failed to prevent immigrants from entering, so the members of Congress found this unique way to restrict immigration.
The most basic purpose of the Immigration Act of 1924 was to protect the ideal of U.S. homogeneity.