A historical study (Twenge, 2001) on the effects of changes in women's social roles in the United States during the twentieth century showed that ________ over the century.

Question

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The study by Twenge (2001) found that both opportunities for women and women's assertiveness fluctuated together throughout the century, rather than steadily increasing or remaining constant.

A Historical Study (Twenge, 2001) on the Effects of Changes