Author Question: An important measure to decrease threats to internal validity in an experimental study is to a. ... (Read 72 times)

washai · **on:** Jul 8, 2018

An important measure to decrease threats to internal validity in an experimental study is to

a. apply the intervention consistently.
b. improve the precision of measurement methods.
c. increase the sample size.
d. randomly assign subjects to study groups.

Question 2

A researcher reviews demographic characteristics of potential study subjects, such as age and gender, to determine whether these characteristics may influence the outcome of the study. This is done to help ensure

a. construct validity.
b. external validity.
c. internal validity.
d. statistical conclusion validity.