When crystal learned to play the piano as a child, her dad would reward her with candy as she practiced. sometimes he gave her candy after 6 minutes of practice, then after another 15 minutes, and then again after another 10 minutes. what type of reinforcement schedule is described here?

How has the immigration of the 1990s affected the social and economic life of the united states?

The ideas of hammond are most clearly an example of which of the following mid-19th century developments? (5 points) the increasingly liberal nature of slavery after the south enforced stronger slave codes the growing use by northern antislavery activists of moral arguments the increasing number of freed slaves in southern states as a result of gradual emancipation laws the growing tendency of southern slaveholders to use the paternal ethos to justify slavery

Why has there been an increase in the older population within our prisons?