Identify the major threat to internal validity in the following research studies. A teacher researcher randomly assigned students within a classroom to two groups, one of which received some special instructional materials to take home with them to study and to use with homework assignments. The C group did not get the special materials. The researcher was surprised to find that there weren't
significant differences between the two groups on achievement tests and other selected measures.
a. Regression
b. Diffusion
c. Mortality
d. Selection
e. History
B
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In order to assess students' ability to express themselves creatively in writing, it would be best to use which of the following?
A. an objective test of writing skill B. extended-response essay questions C. restricted-response essay questions D. themes and other writing assignments
Which of the following are commonly cited problems with testing English learners (ELs)?
1 . These students tend to come from low SES families. 2 . These students tend to attend schools with underqualified teachers. 3 . These students are given tests that have not been validated with national norms. 4 . These students are placed in classes for which the requirements exceed their academic ability. a. 1, 2, 3, 4 b. 1, 2, 3 c. 1, 2, 4 d. 1, 2
One disadvantage when using written notes to record a narrative is that ______.
A. you may run out of ink or space to take notes B. you are not likely to be able to record verbatim responses C. you will distract the storyteller D. you need special equipment
Christine has been struggling with getting started on a research paper for her economics course. Which of the following strategies will best help her avoid procrastination?
a. Ask her instructor for more time on the assignment to avoid being late. b. Ask someone for his or her paper from last term. c. Write down the tasks needed for the paper, and set some short-term goals. d. Make a promise to write her paper tomorrow.