Mathematics, 17.12.2019 18:31 Aidanme25

Apretest of knowledge about microcomputers is given to a group of students 5 min prior to a filnm on the subject. a posttest given 10 min after the film showed a 10-point gain from the pretest. the researcher concludes that the film produced the gain. which of the following is likely the threat to internal validity?

a. statestical regression
b. selection bias
c, testing
d. maturation

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