(a) Sources of Error Variance:
-test construction (variation may consist within items on a test
or between tests)
-test administration (sources of error may stem from the testing
environment -also test-taker variables (emotional problems,
discomfort, lack of sleep, drugs/medication) -examiner-related
variables such as physical appearance and demeanour may play a
role)
-test scoring and interpretation (-computer testing reduces error
in test scoring -many tests still require expert interpretation
(ex: projective tests) -subjectivity in scoring can enter into
behavioral assessment)
(b) No data file is attached for this part
(c) Error variance does not invalidate an experiment. The more error variance, the more difficult it is to detect the effects of the independent variable. We have the means to calculate error variance.
-Sources of error variance are
difference among participants
Random variations in the experimental setting and procedure
Other unsystematic influences
10. (8 pts.) (a) Choose any of the analyses in questions 7, 8, or 9. Use...
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