Astudy of computer-assisted learning examined the learning of "blissymbols" by children. blissymbols are pictographs (think of egyptian hieroglyphs) that are sometimes used to learning-impaired children communicate. the researcher designed two computer lessons that taught the same content using the same examples. one lesson required the children to interact with the material, while in the other the children controlled only the pace of the lesson. call these two styles "active" and "passive", respectively. children were assigned at random to active and passive groups. after the lesson, the computer presented a quiz that asked the children to identify 56 blissymbols. what type of study is this?

The owner of a one-acre parcel of land with a small house on it rented the property to a professor of a nearby college at a monthly rental of $500. several years later, after the professor got tenure, the parties orally agreed that the professor would purchase the property from the owner for the sum of $60,000, payable at the rate of $500 a month for 10 years. they agreed that the owner would give the professor a deed to the property after five years had passed and $30,000 had been paid toward the purchase price, and that the professor would execute a note secured by a mortgage for the balance. the professor continued in possession of the property and made all monthly payments in a timely fashion. when he had paid $30,000, he tendered a proper note and mortgage to the property owner and demanded that she deliver the deed as agreed. the owner refused because valuable minerals had been discovered on adjacent parcels in recent months, causing the value of this parcel of land to increase to 10 times its former value. the professor brought suit against the property owner for specific performance. if the court rules in favor of the property owner, what is the likely reason?

The belmont principle of beneficence requires that: a. subjects derive individual benefit from study participation. b. potential benefits justify the risks of harm. c. the study makes a significant contribution to generalizable knowledge. d. risks are managed so that they are no > minimal.

1. describe the concept of the unitary executive. discuss whether this concept is practical.