Pre-experimental designs produce the greatest threat to internal and external validity because it provides
a. either no control group or no way to equate the groups used
b. a control group through randomization
c. an equivalent-groups design
d. none of the above
Question 2
It is generally inappropriate to generalize the results of a study to a population when the subjects are NOT
randomly selected from the population because
a. the number of subjects in the study is too small
b. there is likely experimenter bias
c. there is little assurance that the subjects are an adequate representation of the population
d. there is little assurance that the data collected from the subjects is reliable
External ear.
A model of anxiety in which stressful events or a changing mental condition can produce unfavorable
Internal and External Loci of Control
Hydrogen burns to produce energy and water
opener E. coli have been genetically engineered to produce lycopene
Floral components. Anthers produce pollen and ovules produce eggs.