If more participants drop out of one of the levels of your independent variable than a second level, you may have a problem with mortality as a threat to internal validity.
Indicate whether the statement is true or false
Question 2
Suppose you have two levels of your independent variable and you assign participants to the levels by asking them to volunteer for one of the levels, the threat to external validity that you should be most concerned with is maturation.
Indicate whether the statement is true or false
School-age children are often independent and industrious, with a developing sense of self-confidenc
Sunlight on Mars is dimmer than on Earth. This photo of a Martian sunset was imaged by Mars Pathfind
The reflection nebula NGC 1999 is brilliantly illuminated by V380 Orionis (center), a variable star
How to solve a linear system when the variable is in the denominator position (Question 2 of 2)
Coastal sensitivity to rising sea levels
Effect of dietary fats on high- and low-density cholesterol levels