Data obtained by multiple observers is useful in controlling
A) experimenter effects.
B) subject effects.
C) placebo effects.
D) social desirability.
Question 2
Which of the following is an appropriate control for situations in which there may be questions of objectivity in making observations?
A) Increase the number of participants.
B) Decrease the number of conditions to be manipulated.
C) Use laboratory animals instead of human participants.
D) Use several observers to record participants' responses.
The cladistic approach from molecular genetic data
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Doty's data show a very rapid drop in late adulthood in the ability to identify smells