The threat to external validity posed by multiple?treatment interference can be reduced
through experimental designs in which:
a. experimental groups experience the independent variables in every possible
sequence or combination.
b. only one independent variable is used.
c. a double?blind situation is used to reduce experimenter expectations.
d. reactivity is decreased through replication.
A
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Which of the following is NOT an attribute of a profession?
A. Systematic theory B. Authority C. Community intervention D. Ethical codes
As a mode of observation, content analysis is essentially an operation of coding
Indicate whether the statement is true or false.
Researchers using dMRI examine the flow direction of diffusion by measuring…
a. mean diffusion rate. b. fractional anisotropy. c. tractogrraphy, d. presence of amblyobia.
How many baseline periods are included in the ABAB single-subject research study?
A. One B. Two C. Three D. Four