Ed 603 Quiz 14

Enter your name and student ID number in the spaces below. Then select the best answer to each test item. After clicking the submit button at the bottom of the page, your responses will be evaluated and the results returned to you.

Name:

Student ID# (or SSN):

  1. Identify the single best way to control extraneous variables.
    1. analysis of covariance
    2. comparing homogeneous groups
    3. matching involving random assignment
    4. randomization

  2. The generalizability of the results of a study is most directly dependent on
    1. type and size of population.
    2. method of statistical analysis employed.
    3. purpose of the study.
    4. precautions taken against extraneous sources of error.
    5. years of experience of the investigator or investigators.

  3. When the results of an experiment are true only under certain very special conditions, the experiment is said to have
    1. low internal validity.
    2. low external validity.
    3. high internal validity.
    4. high external validity.

  4. If an experiment is conducted in a highly controlled, laboratory-like environment, the experiment is said to have
    1. low internal validity.
    2. low external validity.
    3. high internal validity.
    4. high external validity.

  5. Over a period of 3 years, a group of 20 teachers are observed closely by external evaluators as they undergo a series of workshops aimed at improving their quality of instruction. At the end of the 3 years, the same 20 teachers are watched systematically by the same evaluators as they teach. Their teaching has improved according to criteria for improvement (agree-upon definitions and behavior). Perhaps the instruction produced the gain, but perhaps the gain was caused in large part by
    1. history/maturation.
    2. testing.
    3. instrumentation.
    4. statistical regression.

After answering all questions, press .