Identify the major threat to internal validity in the following research studies. A researcher used two classrooms in an experimental study. It was found that the E group had more high ability students than the C group before the study began
a. Regression
b. Diffusion
c. Mortality
d. Selection
e. History
D
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Some children are able to acknowledge that friendship involves give-and-take. However, these children often still see friendship as mutually serving individual interests rather than mutually cooperating toward a common interest. These traits are characteristic of?
a. ?children in the early childhood years. b. ?children in the middle childhood years. c. ?adolescents. d. ?boys rather than girls.
To be effective in changing a habit, you must choose and commit to a new behavior and then set up consequences for failing to keep your commitment
A. True B. False
According to the text, gestures that indicate importance during a lecture are:
a. a raised index finger b. leaning forward c. walking up the aisle d. all of these
Which teacher below is appropriately using the principles of universal design when presenting content to her social studies class?